Content      ..     27      28      29      30     ..

SINUMERIK 840D sl. Service - Functions. Manual (2018-2020) - page 29

Auxiliary function outputs to PLC

13.15 Information options

13.15.1

Group-specific modal M auxiliary function display

Function

The output status and acknowledgment status of M auxiliary functions can be displayed on the

user interface on a group-specific basis.

Requirements

To implement function-oriented acknowledgment and display of M auxiliary functions, the

auxiliary functions must be managed in the PLC and, thus, in the user program itself. Therefore,

it is up to the PLC programmer to program the acknowledgment of these auxiliary functions. The

programmer must know which auxiliary functions in which group have to be acknowledged.

Standard

M auxiliary functions that are not managed by means of the PLC are identified by the NC as

"transferred" and output to the PLC. There is no functional acknowledgment for these auxiliary

functions. All M-auxiliary functions collected after a block search are also displayed so that the

operator knows which auxiliary functions will be output after a start following a block search.

PLC activities

In the case of auxiliary function groups that are managed by the PLC itself, the PLC user program

must acknowledge all auxiliary functions of this group at Transfer and End of function. The PLC

programmer must know all the auxiliary functions of these groups.

Miscellaneous

Only the group-specific M auxiliary functions are displayed. The block-by-block display is also

retained. Up to 15 groups can be displayed, whereby only the last M function of a group that

was either collected or output to the PLC is displayed for each group. The M functions are

presented in various display modes depending on their status:

Status

Display mode

Auxiliary function is collected

Inverted with yellow font

Auxiliary function is output from NC to PLC

Inverted

Auxiliary function has been transferred from NC to PLC and

Black font on gray backg16round

transport acknowledgment has taken place

Auxiliary function is managed by the PLC and has been taken

Black font on gray backg16round

over directly by the PLC

Auxiliary function is managed by the PLC and the function

Black font on gray backg16round

acknowledgment has taken place

Basic functions

Function Manual, 10/2020, 6FC5397-2GP40-0BA1

759

Auxiliary function outputs to PLC

13.15 Information options

Display update

The display is organized in such a way that the collected auxiliary functions are always output

first, before those managed by the PLC and before those managed by the NC. A collected

auxiliary function is marked as collected until it has been output from the NC to the PLC. PLC-

managed auxiliary functions are retained until they are substituted by another auxiliary

function. At a reset, only the collected auxiliary functions and the NC-managed auxiliary

functions are deleted.

13.15.2

Querying system variables

Function

Auxiliary functions can be queried on a group-specific basis via system variables in the part

program and via synchronized actions:

$AC_AUXFU_... [<n>] = <Value>

System variable

Meaning

$AC_AUXFU_PREDEF_INDEX[<n>]

<Value>:

Index of the last auxiliary function collected for an

auxiliary function group (block search) or the last

predefined auxiliary function to be output

Type

INT

:

If no auxiliary function has been output yet for the

specified group or if the auxiliary function is a

user-defined auxiliary function, the variable sup-

plies the value "-1".

<n>:

Group index (0 … 63)

Note:

A predefined auxiliary function can be uniquely identified via

this variable.

$AC_AUXFU_TYPE[<n>]

<Value>:

Type of the last auxiliary function collected for an

auxiliary function group (block search) or the last

auxiliary function to be output

Type

CHAR

:

<n>:

Group index (0 … 63)

$AC_AUXFU_EXT[<n>]

<Value>:

Address extension of the last auxiliary function

collected for an auxiliary function group (block

or or M function-specific:

search) or the last auxiliary function to be output

$AC_AUXFU_M_EXT[<n>]

Type

INT

:

<n>:

Group index (0 … 63)

Basic functions

760

Function Manual, 10/2020, 6FC5397-2GP40-0BA1

Auxiliary function outputs to PLC

13.15 Information options

System variable

Meaning

$AC_AUXFU_VALUE[<n>]

<Value>:

Value of the last auxiliary function collected for an

auxiliary function group (block search) or the last

or or M function-specific:

auxiliary function to be output

$AC_AUXFU_M_VALUE[<n>]

Type

REAL

:

<n>:

Group index (0 … 63)

$AC_AUXFU_SPEC[<n>]

Value:

Bit-encoded output behavior according to

MD22080/MD22035 (or QU programming) of the

last auxiliary function collected for an auxiliary

function group (block search) or the last auxiliary

function to be output

Type

INT

:

<n>:

Group index (0 … 63)

Note:

This variable can be used to determine whether the auxiliary

function should be output with a fast acknowledgment.

$AC_AUXFU_STATE[<n>]

<Value>:

Output state of the last auxiliary function collec-

ted for an auxiliary function group (block search)

or or M function-specific:

or the last auxiliary function to be output

$AC_AUXFU_M_STATE[<n>]

Type:

INT

Range of values:

0 ... 5

0:

Auxiliary function does not exist

1:

M-auxiliary function was collected via a

block search

2:

M-auxiliary function has been output to the

PLC

3:

M-auxiliary function has been output to the

PLC and the transport acknowledgment has

taken place

4:

M-auxiliary function is managed by the PLC

and has been taken over by the PLC

5:

M-auxiliary function is managed by the PLC,

and the function acknowledgment has taken

place

<n>:

Group index (0 … 63)

Example

All M-auxiliary functions of the 1st group will be stored in the order they are output

id=1 every $AC_AUXFU_M_STATE[0]==2 do $AC_FIFO[0,0]=

$AC_AUXFU_M_VALUE[0]

Further information

List Manual System Variables

Basic functions

Function Manual, 10/2020, 6FC5397-2GP40-0BA1

761

Auxiliary function outputs to PLC

13.16 Supplementary conditions

13.16.2

Output behavior

Thread cutting

During active thread cutting G33, G34 and G35, the following output behavior is always active

for the spindle-specific auxiliary functions:

• M3 (spindle right)

• M4 (spindle left)

• Output duration of one OB40 cycle (quick acknowledgement)

• Output during motion

The spindle-specific auxiliary function M5 (spindle stop) is always output at the end of the block.

The part program block that contains M5 is always ended with exact stop, i.e. even during active

continuous-path mode.

Synchronized actions

With output auxiliary functions from synchronized actions, the parameterized output behavior

is ignored except for the following parameters:

• Bit0: Output duration of one OB1 cycle (normal acknowledgement)

• Bit1: Output duration of one OB40 cycle (quick acknowledgement)

Auxiliary functions: M17 or M2/M30 (end of subprogram)

In its own part program block

If one of the auxiliary functions M17, M2 or M30 is programmed as the only auxiliary function in

a part program block and an axis is still in motion, the auxiliary function is not output to the PLC

until after the axis has stopped.

Overriding the parameterized output behavior

The parameterized output behavior of the auxiliary functions M17 or M2/M30 is overridden by the

output behavior that is determined in the following machine data:

MD20800 $MC_SPF_END_TO_VDI, bit 0 (subprogram end / stop to PLC)

Bi

Value

Meaning

t

0

0

The auxiliary functions M17 or M2/M30 (subprogram end) are not output to the PLC. Con-

tinuous-path mode is not interrupted at the end of the subprogram

1

The auxiliary functions M17 or M2/M30 (subprogram end) are output to the PLC.

Auxiliary function: M1 (conditional stop)

Overriding the parameterized output behavior

Basic functions

Function Manual, 10/2020, 6FC5397-2GP40-0BA1

763

Auxiliary function outputs to PLC

13.17 Examples

The parameterized output behavior of the auxiliary function M1 is overridden by the output

behavior defined in the following machine data:

MD20800 $MC_SPF_END_TO_VDI, bit 1 (subprogram end / stop to PLC)

Bi

Value

Meaning

t

1

0

The auxiliary function M01 (conditional stop) is always output to the PLC. A quick acknowl-

edgement is ineffective, because M01 is permanently assigned to the first auxiliary function

group and is therefore always output at the end of the block.

1

The auxiliary function M01 (conditional stop) is only output to the PLC, if the function:

"Programmed stop" is activated via the HMI user interface.

In the case of a quick acknowledgement, the M1 is output to the PLC during the motion.

While the function is not active, this does not interrupt continuous-path mode.

Part program blocks without traversing motion

In a part program block without a traversing motion, all auxiliary functions are output in a block

immediately, irrespective of their parameterized output behavior.

Spindle-specific auxiliary function output only as information for the PLC user program

In certain controller situations, e.g. at the end of a block search, the collected spindle-specific

auxiliary functions (e.g. M3, M4, M5, M19, M40...M45, M70) is output to the NC/PLC interface only

for information purposes for the PLC user program. The controller generates a part program

block (action block) in which the collected auxiliary functions are entered with a negative

address extension. The corresponding system functions are then not executed.

Example: M(-2) = 41 request gear stage change for the 2nd spindle

13.17

Examples

13.17.1

Extension of predefined auxiliary functions

Task

Parameter assignment of auxiliary functions M3, M4, and M5 for the second spindle of the

channel

Parameter assignment: M3

Requirements:

• Machine data index: 0 (first user-defined auxiliary function)

• auxiliary function group: 5

• Type and value: M3 (spindle right)

Basic functions

764

Function Manual, 10/2020, 6FC5397-2GP40-0BA1

Auxiliary function outputs to PLC

13.18 Data lists

Program code

Comment

$MC_AUXFU_ASSIGN_TYPE[17]="M"

; Description of the 18th auxiliary function:

M50

$MC_AUXFU_ASSIGN_EXTENSION[17]=0

$MC_AUXFU_ASSIGN_VALUE[17]=50

$MC_AUXFU_ASSIGN_GROUP[17]=12

$MC_AUXFU_ASSIGN_TYPE[18]="M"

; Description of the 19th auxiliary function:

M51

$MC_AUXFU_ASSIGN_EXTENSION[18]=0

$MC_AUXFU_ASSIGN_VALUE[18]=51

$MC_AUXFU_ASSIGN_GROUP[18]=12

$MN_AUXFU_GROUP_SPEC[12]='H21'

; Specification of the 13th auxiliary function

group

$MC_AUXFU_ASSIGN_TYPE[19]="M"

; Description of the 20th auxiliary function:

M52

$MC_AUXFU_ASSIGN_EXTENSION[19]=0

$MC_AUXFU_ASSIGN_VALUE[19]=52

$MC_AUXFU_ASSIGN_GROUP[19]=13

$MC_AUXFU_ASSIGN_TYPE[20]="M"

; Description of the 21st auxiliary function:

M53

$MC_AUXFU_ASSIGN_EXTENSION[20]=0

$MC_AUXFU_ASSIGN_VALUE[20]=53

$MC_AUXFU_ASSIGN_GROUP[20]=13

13.18

Data lists

13.18.1

Machine data

13.18.1.1

NC-specific machine data

Number

Identifier: $MN_

Description

10713

M_NO_FCT_STOPRE

M function with preprocessing stop

10714

M_NO_FCT_EOP

M function for spindle active after NC RESET

10715

M_NO_FCT_CYCLE

M function to be replaced by subroutine

11100

AUXFU_MAXNUM_GROUP_ASSIGN

Maximum number of user-defined auxiliary functions

per channel

Basic functions

770

Function Manual, 10/2020, 6FC5397-2GP40-0BA1

Auxiliary function outputs to PLC

13.18 Data lists

Number

Identifier: $MN_

Description

11110

AUXFU_GROUP_SPEC

Group-specific output behavior

11450

SEARCH_RUN_MODE

Behavior after a block search

13.18.1.2

Channelspecific machine data

Number

Identifier: $MC_

Description

20110

RESET_MODE_MASK

Definition of control initial setting after part program

start.

20112

START_MODE_MASK

Definition of control initial setting after powerup and on

RESET or at end of part program

20270

CUTTING_EDGE_DEFAULT

Basic setting of tool cutting edge without programming

20800

SPF_END_TO_VDI

Subroutine end / Stop at PLC

22000

AUXFU_ASSIGN_GROUP

Group assignment of user-defined auxiliary functions

22010

AUXFU_ASSIGN_TYPE

Type of user-defined auxiliary functions

22020

AUXFU_ASSIGN_EXTENSION

Address extension for user-defined auxiliary functions

22030

AUXFU_ASSIGN_VALUE

Value of user-defined auxiliary functions

22035

AUXFU_ASSIGN_SPEC

Output behavior of user-defined auxiliary functions

22040

AUXFU_PREDEF_GROUP

Group assignment of predefined auxiliary functions

22050

AUXFU_PREDEF_TYPE

Type of predefined auxiliary functions

22060

AUXFU_PREDEF_EXTENSION

Address extension for predefined auxiliary functions

22070

AUXFU_PREDEF_VALUE

Value of predefined auxiliary functions

22080

AUXFU_PREDEF_SPEC

Output behavior of predefined auxiliary functions

22100

AUXFU_QUICK_BLOCKCHANGE

Block change delay with quick auxiliary functions

22110

AUXFU_H_TYPE_INT

Type of H auxiliary functions

22200

AUXFU_M_SYNC_TYPE

M functions output time

22210

AUXFU_S_SYNC_TYPE

S functions output time

22220

AUXFU_T_SYNC_TYPE

T functions output time

22230

AUXFU_H_SYNC_TYPE

H functions output time

22240

AUXFU_F_SYNC_TYPE

F functions output time

22250

AUXFU_D_SYNC_TYPE

D functions output time

22252

AUXFU_DL_SYNC_TYPE

DL functions output time

22254

AUXFU_ASSOC_M0_VALUE

Additional M function for program stop

22256

AUXFU_ASSOC_M1_VALUE

Additional M function for conditional stop

22530

TOCARR_CHANGE_M_CODE

M code for change of tool holder

22532

GEOAX_CHANGE_M_CODE

M code for replacement of geometry axes

22534

TRAFO_CHANGE_M_CODE

M code for change of tool holder

22560

TOOL_CHANGE_M_CODE

Auxiliary function for tool change

Basic functions

Function Manual, 10/2020, 6FC5397-2GP40-0BA1

771

Digital and analog NC I/O

14.2 Indirect I/O access via PLC

I/O modules can also be connected to the PROFIBUS DP/MPI interfaces X126 and X136. This

enables the number of digital and analog NC inputs/outputs to be expanded by 32 digital and 8

analog inputs and outputs respectively. These NC inputs/outputs are called external NC I/Os in

the following.

Table 14-1

Maximum number of digital and analog NC I/Os

Onboard

NC I/O

Total

Digital inputs

4

32

36

Digital outputs

4

32

36

Analog inputs

-

8

8

Analog outputs

-

8

8

Further information

• Manual SINUMERIK 840D sl

• Operating instructions for SIMATIC ET 200S FC

See also

Direct I/O access via PLC (Page 795)

14.2.2

Parameterization

Machine data

Number of active NC I/Os

The number of active or from the NC usable digital NC I/O bytes are set in the following machine

data:

• Number of digital NC input bytes

MD10350 $MN_FASTIO_DIG_NUM_INPUTS = <number>

• Number of digital NC output bytes

MD10360 $MN_FASTIO_DIG_NUM_OUTPUTS = <number>

The number of active or from the NC usable analog I/Os are set in the following machine data:

• Number of analog NC inputs

MD10300 $MN_FASTIO_ANA_NUM_INPUTS = <number>

• Number of the analog NC outputs

MD10310 $MN_FASTIO_ANA_NUM_OUTPUTS = <number>

The I/Os do not have to actually exist in the hardware. In this case, the signal states or the analog

values are set to "zero" in a defined way inside the NC.

The values present at the I/O inputs can be changed from the PLC user program before they are

read by the NC.

Basic functions

Function Manual, 10/2020, 6FC5397-2GP40-0BA1

775

Digital and analog NC I/O

14.2 Indirect I/O access via PLC

MD21220 $MC_MULTFEED_ASSIGN_FASTIN = <byte address>

<byte address>

Digital NC I/Os

0

None

1

1 ... 4

Onboard inputs/outputs

5 ... 8

NC output without hardware

2

9 ... 16

External NC I/O

3

17 ... 24

External NC I/O

4

25 ... 32

External NC I/O

5

33 ... 40

External NC I/O

128

Inputs 1 to 8 of comparator byte 1

129

Inputs 9 to 16 of comparator byte 2

Note

Multiple assignments

Multiple assignments of inputs are not considered to be incorrect parameterization.

Multiple assignments of outputs are considered to be incorrect parameterization, are checked

during run-up and indicated by an alarm.

Example: Hardware assignment of external I/Os

Two input bytes and one output byte are parameterized for the reading/writing of digital I/Os of

a PROFIBUS module.

Number of active NC I/O bytes

MD10350 $MN_FASTIO_DIG_NUM_INPUTS =

; 2 digital input bytes + 1 onboard byte

2 + 1 = 3

MD10360 $MN_FASTIO_DIG_NUM_OUTPUTS

; 1 digital output byte + 1 onboard byte

= 1 + 1 = 2

Hardware assignment

MD10366 $MN_HW_ASSIGN_DIG_FASTIN[ 0 ] ; $A_IN[ 9 ] ... [ 16 ] from 1st I/O input byte

= 'H5000200'

MD10366 $MN_HW_ASSIGN_DIG_FASTIN[ 1 ] ; $A_IN[ 17 ] ... [ 24 ] from 2nd I/O input byte

= 'H5000201'

MD10368 $MN_HW_ASSIGN_DIG_FAST-

; $A_OUT[ 9 ] ... [ 16 ] in 1st I/O output byte

OUT[ 0 ] = 'H5000200'

The hexadecimal addresses 200_H and 201_H entered in the machine data correspond to those

assigned during the configuration in the SIMATIC S7 Manager, decimal logical start addresses

512_D and 513_D

Basic functions

Function Manual, 10/2020, 6FC5397-2GP40-0BA1

777

Digital and analog NC I/O

14.2 Indirect I/O access via PLC

14.2.3

System variables

Input data

System variable

Index or input number <n>

$A_IN[ <n> ]

1 ... 4 and 9 ... 40, see Digital NC inputs (Page 778)

$A_INA [<n>]

1 ... 8, see Analog NC inputs (Page 784)

A preprocessing stop is triggered in the channel when reading input data from a part program.

Output data

System variable

Index or output number <n>

$A_OUT [<n>]

1 ... 4 and 9 ... 40, see Digital NC outputs (Page 780)

$A_OUTA [<n>]

1 ... 8, see Analog NC outputs (Page 786)

A preprocessing stop is triggered in the channel when reading output data from a part program.

14.2.4

Comparator inputs

In addition to the I/O inputs, 16 control-internal comparator inputs are available.

The current signal state of a comparator input results from the comparison of an analog I/O input

with a threshold value specified in the setting data.

See "Comparator inputs (Page 791)".

14.2.5

Digital NC I/Os

14.2.5.1

Digital NC inputs

Function

Using system variables $A_IN, values of digital NC inputs can be read into an NC program or

synchronized action. The read value can be influenced via NC/PLC interface signals.

Application examples

Digital NC inputs are used, for example, for the following NC functions:

• Delete distance-to-go with positioning axes

• Fast program branching at the end of block

• Programmed read-in disable

• Several feedrates in one block

Further information

Function Manual Synchronized Actions

Basic functions

778

Function Manual, 10/2020, 6FC5397-2GP40-0BA1

Digital and analog NC I/O

14.2 Indirect I/O access via PLC

NC/PLC interface signals

1& LQSXW

1&

3/&

$FWXDO YDOXH

'% '%%

'%%

/RFN

'% '%% '%%

6HW

'% '%% '%%

1& SURJUDP

$B,1>

@

1& LQSXW YDOXH

Actual value

The actual value of the NC input can be read in the PLC user program via the actual value

interface.

Note

Different values

The value in the "Actual value" interface can, as a result of the various subsequent influencing

possibilities, have a different value than that available at the NC input, which is read using system

variable $A_IN.

Lock

If a bit is set in the interface, for the corresponding input, a value of 0 is transferred.

Set

If a bit is set in the interface, for the corresponding input, a value of 1 is transferred.

Overview

Lock

Set

Actual value

NC input

DBX0.0 - 7

DBX1.0 - 7

DBX60.0 - 7

1 - 8

DBX122.0 - 7

DBX123.0 - 7

DBX186.0 - 7

9 - 16

DBX124.0 - 7

DBX125.0 - 7

DBX187.0 - 7

17 - 24

DBX126.0 - 7

DBX127.0 - 7

DBX188.0 - 7

25 - 32

DBX128.0 - 7

DBX129.0 - 7

DBX189.0 - 7

33 - 40

Basic functions

Function Manual, 10/2020, 6FC5397-2GP40-0BA1

779

Digital and analog NC I/O

14.2 Indirect I/O access via PLC

Boundary conditions

Response after a warm restart and channel reset

The value at the hardware input is transferred, unchanged after a warm restart and channel

reset.

14.2.5.2

Digital NC outputs

Function

Using system variables $A_OUT, values of digital NC outputs can be written to an NC program

or synchronized action. The written value can be influenced using NC/PLC interface signals.

Application examples

• Positioning switching signals (see Function Manual Axes and Spindles, Section Software

cams)

• Output of comparator signals

Further information

Function Manual Synchronized Actions

NC/PLC interface signals

1&

3/&

1& SURJUDP

6HWWLQJ YDOXH

$B287>

@

'% '%% '%%

2YHUZULWH

'% '%% '%%

6HWSRLQW

1& RXWSXW YDOXH

'% '%%

'%%

7DUJHW

'% '%% '%%

/RFN

'% '%% '%%

1& RXWSXW

Basic functions

780

Function Manual, 10/2020, 6FC5397-2GP40-0BA1

Digital and analog NC I/O

14.2 Indirect I/O access via PLC

Overwrite

If, in the interface, a bit is set, then for the corresponding output, instead of the value written

using system variables $A_OUT, the setting value specified from the PLC user program is used.

The value written via system variables $A_OUT is then lost.

If the bit in the interface is reset, then the actual value is kept at the hardware output.

Setting value

Using the setting value, the PLC user program can specify a defined output value. In order that

the setting value becomes active, it must be activated via the interfaces for "Overwrite" or

"Target".

Setpoint

The actual NC output value can be read in the PLC user program via the setpoint.

Note

Different values

The value in the "Setpoint" interface can, as a result of the various subsequent influencing

possibilities, have a different value than that available at the NC output.

Target

If, in the interface, a bit is set, then for the corresponding output, instead of the NC output value,

the setting value specified by the PLC user program is used. The actual NC output value is kept.

If a bit is reset in the interface, then the last NC output value becomes active again.

Lock

If a bit is set in the interface, for the corresponding output, a value of 0 is output.

Overview

Lock

Overwrite

Setting value

Target

Setpoint

NC output

DBX4.0 - 7

DBX5.0 - 7

DBX6.0 - 7

DBX7.0 - 7

DBX64.0 - 7

1 - 8

DBX130.0 - 7

DBX131.0 - 7

DBX132.0 - 7

DBX133.0 - 7

DBX190.0 - 7

9 - 16

DBX134.0 - 7

DBX135.0 - 7

DBX136.0 - 7

DBX137.0 - 7

DBX191.0 - 7

17 - 24

DBX138.0 - 7

DBX139.0 - 7

DBX140.0 - 7

DBX141.0 - 7

DBX192.0 - 7

25 - 32

DBX142.0 - 7

DBX143.0 - 7

DBX144.0 - 7

DBX145.0 - 7

DBX193.0 - 7

33 - 40

Boundary conditions

NC outputs without hardware

An alarm is not displayed if NC outputs are written to, which were defined (MD10360

$MN_FASTIO_DIG_NUM_OUTPUTS), but the corresponding hardware is not available. The

setpoint can be read via the PLC user program.

Basic functions

Function Manual, 10/2020, 6FC5397-2GP40-0BA1

781

Digital and analog NC I/O

14.2 Indirect I/O access via PLC

Behavior at end of program reset/channel reset

From the PLC user program, via the interfaces for "Overwrite", "Target" or "Lock", at the end of

program or for a channel reset, every NC output can be set in defined fashion as a function of the

specific application.

Behavior for a warm restart

All NC outputs are set to "0" after a warm restart. From the PLC user program, using the overwrite

or setting screen form, every NC output can be set as a function of the specific application.

14.2.5.3

Connection and logic operations of fast digital I/Os

Function

Fast NC I/O inputs can be set via the software depending on the fast-output signal states.

Overview:

2XWSXW

,QSXW

%\WH

%\WH

%LW

%LW

$OWHUQDWLYHV

,QWHUFRQQHFW

25 ORJLF RSHUDWLRQ

$1' ORJLF RSHUDWLRQ

Connecting

The NC I/O fast input is set to the signal state of the assigned fast output.

OR operation

The NC I/O fast input adopts the signal state as a result of the ORing of the output signal with the

assigned input signal.

AND operation

The NC I/O fast input adopts the signal state as a result of the ANDing of the output signal with

the assigned input signal.

Basic functions

782

Function Manual, 10/2020, 6FC5397-2GP40-0BA1

Digital and analog NC I/O

14.2 Indirect I/O access via PLC

Special cases

• If several output bits are assigned to the same input bit, then the one with the highest MD

index becomes effective.

• If inputs or outputs are specified which do not exist or are not activated, then the assignment

is ignored without an alarm. Checking of the active bytes of the NC I/Os is performed via the

entries in machine data:

MD10350 $MN_FASTIO_DIG_NUM_INPUTS

MD10360 $MN_FASTIO_DIG_NUM_OUTPUTS

Defining assignments

The assignments are specified via machine data:

MD10361 $MN_FASTIO_DIG_SHORT_CIRCUIT[n]

n: can accept values 0 to 9, so up to 10 assignments can be specified.

Two hexadecimal characters are provided for specifying the byte and bit of an output and an

input.

Specifying 0, A and B in input bits 12 - 15 results in the following logic operations:

0

Connecting

A

AND operation

B

OR operation

)$67,2B',*B6+257B&,5&8,7>Q@

2XWSXW

,QSXW

%LW

%\WH

%LW

%\WH

൹ 7\SH RI ORJLF RS

%LW

Examples

Connect:

MD10361 $MN_FASTIO_DIG_SHORT_CIRCUIT = '04010302H'

Output 4, byte 1, connect to

Input 3, byte 2

AND operation:

MD10361 $MN_FASTIO_DIG_SHORT_CIRCUIT = '0705A201H'

Output 7, byte 5 AND operation with

Input 2, byte 1

OR operation:

Basic functions

Function Manual, 10/2020, 6FC5397-2GP40-0BA1

783

Digital and analog NC I/O

14.2 Indirect I/O access via PLC

MD10361 $MN_FASTIO_DIG_SHORT_CIRCUIT = '0103B502H'

Output 1, byte 3 OR operation with

Input 5, byte 2

14.2.6

Analog NC I/Os

14.2.6.1

Analog NC inputs

Function

Using system variables $A_INA, values of analog NC inputs can be read into an NC program or

synchronized action. The read value can be influenced via NC/PLC interface signals.

Binary analog value display

NC/PLC interface signals

1& LQSXW

1&

3/&

$FWXDO YDOXH

'% '%:

'%:

/RFN

'% '%%

6HWWLQJ YDOXH

'% '%:

'%:

7DUJHW

'% '%%

1& SURJUDP

$B,1>

@

1& LQSXW YDOXH

Actual value

The actual value of the NC input can be read in the PLC user program via the actual value

interface.

Basic functions

784

Function Manual, 10/2020, 6FC5397-2GP40-0BA1

Digital and analog NC I/O

14.2 Indirect I/O access via PLC

The actual value is represented as a fixed point number (16 bit value including sign) in a 2's

complement.

See "Representation of the analog I/O values (Page 789)".

Note

Different values

The value in the "Actual value" interface can, as a result of the various subsequent influencing

possibilities, have a different value than that available at the NC input, which is read using system

variable $A_INA.

Lock

If a bit is set in the interface, for the corresponding input, a value of 0 is transferred.

Setting value

Using the setting value, the PLC user program can specify a defined input value. In order that the

setting value becomes active, it must be activated via the "Overwrite" interface.

The setting value must be specified as a fixed point number (16 bit value including sign) in 2's

complement.

See "Representation of the analog I/O values (Page 789)".

Target

If a bit is set in the interface, for the corresponding input, the associated "Setting value" is

transferred.

Overview

Lock

Target

Setting value

Actual value

NC input

DBX146.0 - 7

DBX147.0 - 7

DBW148 - 162

DBW194 - 209

1 - 8

Machine data

Weighting factor

Using the weighting factor, for each analog NC input, the DA converter of the I/O module being

used can be adapted by appropriately parameterizing it.

MD10320 $MN_FASTIO_ANAINTPUT_WEIGHT[<Output>]

Note

Analog NC inputs without hardware

With a weighting factor of 32767, the digitized analog values for the NC program and PLC user

program are identical. As a consequence, the NC output can be used for 1:1 communication

between the NC program and PLC user program.

Basic functions

Function Manual, 10/2020, 6FC5397-2GP40-0BA1

785

Digital and analog NC I/O

14.2 Indirect I/O access via PLC

NC/PLC interface signals

1&

3/&

1& SURJUDP

$B287$>

@

(YDOXDWLRQ

6HWWLQJ YDOXH IURP WKH 3/&

'% '%:

'%:

2YHUZULWH

'% '%%

6HWSRLQW

1& RXWSXW YDOXH

'% '%:

'%:

7DUJHW

'% '%%

/RFN

'% '%%

1& RXWSXW

1)

MD10330 $MN_FASTIO_ANA_OUTPUT_WEIGHT[<Output>]

Setting value

Using the setting value, the PLC user program can specify a defined output value. In order that

the setting value becomes active, it must be activated via the interfaces for "Overwrite" or

"Target".

The setting value must be specified as a fixed point number (16 bit value including sign) in 2's

complement.

See "Representation of the analog I/O values (Page 789)".

Overwrite

If a bit is set, then for the corresponding output, instead of the value written using system

variables $A_OUTA, the setting value specified from the PLC user program is used. The value

written via system variables $A_OUTA is then lost.

Basic functions

Function Manual, 10/2020, 6FC5397-2GP40-0BA1

787

Digital and analog NC I/O

14.2 Indirect I/O access via PLC

If a bit is reset, for the corresponding output, the actual value at the hardware output is kept.

Target

If a bit is set, then for the corresponding output, instead of the NC output value, the setting value

specified by the PLC user program is used. The actual NC output value is kept.

If a bit is reset, then for the corresponding output, the last NC output value becomes active again.

Lock

If a bit is set in the interface, a value of 0 is output at the corresponding NC output.

Setpoint

The actual NC output value can be read in the PLC user program via the setpoint.

The setpoint is represented as a fixed point number (16 bit value including sign) in a 2's

complement.

See "Representation of the analog I/O values (Page 789)".

Note

Different values

The value in the "Setpoint" interface can, as a result of the various subsequent influencing

possibilities, have a different value than that available at the NC output.

Overview

Lock

Overwrite

Setting value

Target

Setpoint

NC output

DBX168.0 - 7

DBX166.0 - 7

DBW170 - 184

DBX167.0 - 7

DBW210 - 225

1 - 8

Machine data

Weighting factor

Using the weighting factor, for each analog NC output, the DA converter of the I/O module being

used can be adapted by appropriately parameterizing it.

MD10330 $MN_FASTIO_ANA_OUTPUT_WEIGHT[<Output>]

Program code

Comment

; Assumption: Analog value range

±10 V

; Parameterization: MD10330 $MN_FASTIO_ANA_OUTPUT_WEIGHT[<output>] = 10000

$A_OUTA[<output>] =

9500

; NC output: 9.5 V

$A_OUTA[<output>] = -4120

; NC output: -4.12 V

Basic functions

788

Function Manual, 10/2020, 6FC5397-2GP40-0BA1

Digital and analog NC I/O

14.2 Indirect I/O access via PLC

Note

Analog NC outputs without hardware

With a weighting factor of 32767, the digitized analog values for the NC program and PLC user

program are identical. As a consequence, the NC output can be used for 1:1 communication

between the NC program and PLC user program.

Boundary conditions

Analog NC outputs without hardware

An alarm is not displayed if NC outputs are written to, which were defined (MD10310

$MN_FASTIO_ANA_NUM_OUTPUTS), but the corresponding hardware is not available. The

setpoint can be read via the PLC user program.

Behavior for a warm restart

All NC outputs are set to "0" after a warm restart. Every NC input can be set as a function of the

specific application from the PLC user program.

Behavior at end of program reset/channel reset

From the PLC user program, via the interfaces for "Overwrite", "Target" or "Lock", at the end of

program or for a channel reset, every NC output can be set in defined fashion as a function of the

specific application.

14.2.6.3

Representation of the analog I/O values

The digitized analog values are represented at the NC/PLC interface as fixed-point numbers (16

bits including sign) in the two's complement.

Bit number

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

Signifi-

SG

2¹⁴

2¹³

2¹²

2¹¹

2¹⁰

2⁹

2⁸

2⁷

2⁶

2⁵

2⁴

2³

2²

2¹

2⁰

cance

SG: Sign

Minimum value

Maximum value

-32768_D

32767_D

8000_H

7FFF_H

Increment

For a resolution of 16 bits and a nominal range of ±10 V, the increment is:

20 V / 2¹⁶ = 20 V / 65536 ≈ 0.305 mV

Basic functions

Function Manual, 10/2020, 6FC5397-2GP40-0BA1

789

Digital and analog NC I/O

14.2 Indirect I/O access via PLC

Resolutions < 16 bits

If the resolution of an analog module is less than 16 bits including sign, then the digitized analog

value is entered in the interface starting from bit 14. The unused least significant bit positions

are filled with "0".

14-bit resolution

For a resolution of 14 bits including sign and a nominal range of ±10 V, the increment is:

20 V / 2¹⁴ = 20 V / 16384 ≈ 1.22 mV

Bit 0 ... 1 are always "0".

12-bit resolution

For a resolution of 12 bits including sign and a nominal range of ±10 V, the increment is:

20 V / 2¹² = 20 V / 4096 ≈ 4.88 mV

Bit 0 ... 3 are always "0".

Representation of the maximum value for different resolutions

Bit number

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

Significance of the bits

SG

2¹⁴

2¹³

2¹²

2¹¹

2¹⁰

2⁹

2⁸

2⁷

2⁶

2⁵

2⁴

2³

2²

2¹

2⁰

16-bit resolution: 32767_D = 7FFF_H

0

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

14-bit resolution: 8191_D = 1FFF_H

0

1

1

1

1

1

1

1

1

1

1

1

1

1

0

0

12-bit resolution: 2047_D = 7FF_H

0

1

1

1

1

1

1

1

1

1

1

1

0

0

0

0

Note

The data (resolution, nominal range) of the analog input/output module used can be taken from

the documentation of the particular module.

Examples

Digital representation of analog values at a resolution of 14 bits including sign and a nominal

range of ±10 V.

Example 1: Analog value = 9.5 V

Digitized analog value (decimal):

9.5 V / 20 V * 16384 = 7782

Digitized analog value 14-bit (binary):

01 1110 0110 0110

Digitized analog value 16-bit (binary):

0111 1001 1001 1000

Digitized analog value 16-bit (hex):

7998_H

Example 2: Analog value = -4.12 V

Digitized analog value (decimal):

-4.12 V / 20 V * 16384 = -3375

Digitized analog value 14-bit (binary):

11 0010 1101 0001

Digitized analog value 16-bit (binary):

1100 1011 0100 0100

Digitized analog value 16-bit (hex):

CB44 _H

Basic functions

790

Function Manual, 10/2020, 6FC5397-2GP40-0BA1

Digital and analog NC I/O

14.2 Indirect I/O access via PLC

Functional sequence

The functional sequence for comparator input byte 1 is represented schematically in the

following figure.

'LJLWDO

$QDORJ LQSXW

2XWSXW E\WH

$QDORJ LQSXW

0'

> E!@

Q!

$VVLJQPHQW RI DQDORJ LQSXW

'LJLWDO RXWSXWV

0'

%LW

Q! WR FRPSDUDWRU ELW

%\WH VSHFLILFDWLRQ

&RPSDULVRQ

0'

%LW

ELW

$QDORJ YDOXH WKUHVKROG YDOXH

,QYHUVLRQ PDVN

0'

%LW

RU

%LW

$QDORJ YDOXH ุ WKUHVKROG YDOXH

7KUHVKROG YDOXH

7KUHVKROG YDOXH

6'

&RPSDUDWRU LQSXW E\WH

&RPSDUDWRU LQSXW E\WH

&RPSDUDWRU LQSXW ELW

&RPSDUDWRU LQSXW

3DUW SURJUDP

$B,1&2 > Q!@

1& IXQFWLRQV

5HDGLQJ RI FRPSDUDWRU

$FFHVV WR FRPSDUDWRU LQSXW E\WH

LQSXW Q! Q!

b b

RU RI 1& IXQFWLRQV

)URP WKH SDUW SURJUDP

Basic functions

794

Function Manual, 10/2020, 6FC5397-2GP40-0BA1

Digital and analog NC I/O

14.3 Direct I/O access via PLC

Principle of the parameterization of the NC I/O in the input area

0'

01B3/&,2B/2*,&B$''5(66B,1

0'

01B3/&,2B180B%<7(6B,1

3/& LQSXW LPDJH

Transfer times

• Transfer of the output data from the NC to the output modules

- The output data is transferred from the NC to the output modules at the end of the current

interpolator cycle.

- The transfer is only performed when at least one output data item has been written in the

current interpolator cycle.

• Transfer of the input data from the input modules to the NC

- Time within which the cyclic request for the update of the input data (input image of the

modules → NC input data) from the NC to the PLC is sent, can be set via the machine data:

- MD10398 $MN_PLCIO_IN_UPDATE_TIME = <update time>

- The parameterized update time is rounded up internally to the next highest multiple of an

interpolator cycle. With update time = 0, the request is transferred to the PLC in each

interpolation cycle.

- The request for the update of the input data is sent to the PLC at the end of the

parameterized interpolation cycle.

- The updated input data is available at the earliest in the following interpolation cycle.

Selection of the storage format (little/big endian)

A total of 16 KB is available for the data transfer between the NC and PLC for all NC channels.

These areas have to be managed by the user (i.e. no overlapping of the variables, not even across

channel borders).

The display of the variables within these areas depends on the setting in the machine data:

MD10399 $MN_PLCIO_TYPE_REPRESENTATION = <value>

<val-

Meaning

ue>

0

Little endian format (default setting)

System variables are displayed in little endian format ⇒ least significant byte at least significant

address

1

Big endian format (PLC standard format, recommended)

System variables are displayed in big endian format ⇒ most significant byte at least significant

address

Note

The big endian format is the format usually used in the PLC and PLC I/O. Therefore, it is recom-

mended that you use this setting.

Basic functions

796

Function Manual, 10/2020, 6FC5397-2GP40-0BA1

Digital and analog NC I/O

14.3 Direct I/O access via PLC

14.3.2

Reading/writing: System variables

Input data

System variable

Type

Offset <n>

$A_PBB_IN[<n>]

Byte

0, 1, 2, ... (MD10394 $MN_PLCIO_NUM_BYTES_IN -1)

$A_PBW_IN[<n>]

Word

0, 2, 4, ... (MD10394 $MN_PLCIO_NUM_BYTES_IN - 2)

$A_PBD_IN[<n>]

Double

0, 4, 8, ... (MD10394 $MN_PLCIO_NUM_BYTES_IN - 4)

$A_PBR_IN[<n>]

Real

0, 4, 8, ... (MD10394 $MN_PLCIO_NUM_BYTES_IN - 4)

A preprocessing stop is triggered in the channel when reading from a part program.

Output data

System variable

Type

Offset <n>

$A_PBB_OUT[<n>]

Byte

0, 1, 2, ... (MD10396 $MN_PLCIO_NUM_BYTES_OUT - 1)

$A_PBW_OUT[<n>]

Word

0, 2, 4, ... (MD10396 $MN_PLCIO_NUM_BYTES_OUT - 2)

$A_PBD_OUT[<n>]

Double

0, 4, 8, ... (MD10396 $MN_PLCIO_NUM_BYTES_OUT - 4)

$A_PBR_OUT[<n>]

Real

0, 4, 8, ... (MD10396 $MN_PLCIO_NUM_BYTES_OUT - 4)

A preprocessing stop is triggered in the channel when reading output data from a part program.

Value ranges of the output data

Type

Value range

Byte

With sign:

-128 ... +127

Without sign:

0 ... 255

Word

With sign:

-32768 ... +32767

Without sign:

0 ... 65535

Double

With sign:

-2147483648 ... +2147483647

Without sign:

0 ... 4294967295

Real

-3.402823466*10⁺³⁸ ... +3.402823466*10⁺³⁸

14.3.3

Supplementary conditions

Several slots

If several slots form an input or output range of the PLC I/O used directly by the NC, the address

range of the slots must be configured as a continuous range without gaps.

Parallel writing of the NC and PLC

Parallel writing of I/O outputs by the NC via direct access over the PLC and from the PLC user

program results in a random, mutual overwriting of the output values. The application is

therefore not permitted, but cannot be prevented on the control.

Time response

The time when the data is read in from the PLC I/Os is not synchronized with the time when the

data is made available to the part program via system variables!

Basic functions

Function Manual, 10/2020, 6FC5397-2GP40-0BA1

797

Digital and analog NC I/O

14.3 Direct I/O access via PLC

Program code

Comment

ID=2 WHEN $AA_IW[x] >= 5 DO $A_PBW_OUT[1]=R11

; 2-byte integer value

Addressing example: $PBW_OUT[ 1 ] = R11

0'

01B3/&,2B/2*,&B$''5(66B287

0'

01B3/&,2B180B%<7(6B287

$B3%

:B287>

@

3/& RXWSXW LPDJH

14.3.4.2

Reading from PLC-I/Os

Specifications

• Decimal logical addresses of the input data to be read within the PLC I/O

-

420: 2-byte integer value

-

422: 4-byte integer value

-

426: 4-byte real value

-

430: 1-byte integer value

• The input data should be stored in a part program in the R parameters R1 - R4.

• In order to only slow down the execution of the PLC user program (OB1) slightly, the update

cycle for read access should be 3-times the interpolator cycle of 12 ms.

Parameterization

• Length of the NC I/O input data area: 2 + 4 + 4 + 1 = 11 bytes

MD10394 $MN_PLCIO_NUM_BYTES_IN = 11

• Logical start address of the input data area: 420

MD10395 $MN_PLCIO_LOGIC_ADRESS_IN = 420

• Update cycle: I/O input data → system variables = 3 * interpolator cycle= 3 * 12 ms = 36 ms

MD10398 $MN_PLCIO_IN_UPDATE_TIME = 3 * 0.012 = 0.036

• Data format: Big endian

MD10399 $MN_PLCIO_TYPE_REPRESENTATION = 1

Refreshing

The system variables are updated in every third interpolation cycle after the NC and PLC startup.

Basic functions

Function Manual, 10/2020, 6FC5397-2GP40-0BA1

799

Digital and analog NC I/O

14.4 Direct I/O access without PLC

Programming

Reading in the NC I/O in R parameters:

Program code

Comment

R1=$A_PBW_IN[0]

; 2-byte integer value

R2=$A_PBD_IN[2]

; 4-byte integer value

R3=$A_PBR_IN[6]

; 4-byte real value

R4=$A_PBB_IN[10]

; 1-byte integer value

Addressing example: R2 = $PBD_IN[ 2 ]

0'

01B3/&,2B/2*,&B$''5(66B,1

0'

01B3/&,2B180B%<7(6B,1

$B3%'B,1>

@

3/& LQSXW LPDJH

14.4

Direct I/O access without PLC

14.4.1

Brief description

Isochronous and non-isochronous PROFINET

Reading / writing of the PROFINET I/O is possible with both isochronous and non-isochronous

PROFINET configuration.

I/O range

If slots are configured for a PROFINET slave used for the NC I/O in such a way that they are in

ascending order without gaps, they are called the I/O range in the following.

An I/O range is therefore characterized by:

• Logical start address: Logical start address of the first slot of the PROFINET slave

• Length: Total length of all slots used for the PROFINET slave

The parameterization of the logical start address and the length of the I/O range is performed in

the NC via machine data (see "Parameter assignment (Page 802)").

Basic functions

800

Function Manual, 10/2020, 6FC5397-2GP40-0BA1

Digital and analog NC I/O

14.4 Direct I/O access without PLC

I/O range attributes

• Attribute of the input range 1, 2, ... m:

MD10502 $MN_DPIO_RANGE_ATTRIBUTE_IN[ <n> ] ; with <n> = 0, 1, 2, ... (m - 1)

Bit

Val-

Meaning

ue

0

Format display of system variables $A_DPx_IN[<n>,<m>]

0

Little endian format

1

Big endian format

2

Reading of input data

0

Reading possible via system variables and CC-binding

1

Reading possible only for CC-binding

3

Output of slot sign-of-life alarms

0

Slot sign-of-life alarms are issued

1

Slot sign-of-life alarms are suppressed

• Attribute of the output range 1, 2, ... m:

MD10512 $MN_DPIO_RANGE_ATTRIBUTE_OUT[ <n> ] ; with <n> = 0, 1, 2, ... (m - 1)

Bit

Value

Meaning

0

Format display of system variables $A_DPx_OUT[<n>,<m>]

0

Little endian format

1

Big endian format

1

Writing of output data

0

Writing only via system variable

1

Writing only via CC-binding

3

Output of slot sign-of-life alarms

0

Slot sign-of-life alarms are issued

1

Slot sign-of-life alarms are suppressed

14.4.3

Reading/writing

14.4.3.1

System variables

Input data

System variable

Type

Meaning

$A_DPB_IN[<n>,<b>]

8-bit unsigned

Reads a data byte (8-bit)

$A_DPW_IN[<n>,<b>]

16-bit unsigned

Reads a data word (16-bit)

$A_DPSB_IN[<n>,<b>]

8-bit signed

Reads a data byte (8-bit)

$A_DPSW_IN[<n>,<b>]

16-bit signed

Reads a data word (16-bit)

Basic functions

Function Manual, 10/2020, 6FC5397-2GP40-0BA1

803

Digital and analog NC I/O

14.4 Direct I/O access without PLC

System variable

Type

Meaning

$A_DPSD_IN[<n>,<b>]

32-bit signed

Reads a data double word (32-bit)

$A_DPR_IN[<n>,<b>]

32-bit REAL

Reads input data (32-bit REAL)

<n> = input range 1, 2, ... m; <b> = byte index within the input range: 0, 1, ... (length - 1)

Output data

System variable

Type

Meaning

$A_DPB_OUT[<n>,<b>]

8-bit unsigned

Writes a data byte (8-bit)

$A_DPW_OUT[<n>,<b>]

16-bit unsigned

Writes a data word (16-bit)

$A_DPSB_OUT[<n>,<b>]

8-bit signed

Writes a data byte (8-bit)

$A_DPSW_OUT[<n>,<b>]

16-bit signed

Writes a data word (16-bit)

$A_DPSD_OUT[<n>,<b>]

32-bit signed

Writes a data double word (32-bit)

$A_DPR_OUT[<n>,<b>]

32-bit REAL

Writes output data (32-bit REAL)

<n> = output range 1, 2, ... m; <b> = byte index within the output range: 0, 1, ... (length - 1)

Configured and parameterized I/O ranges for part programs / synchronized actions

Each system variable is a 32-bit bit array. Each bit is assigned to an I/O range.

Bit <n> ≙ machine data index <n> ≙ I/O range <n+1>

Bit <n> == 1 ⇒ The I/O range <n+1> is configured/parameterized.

System variable

Type

Meaning

$A_DP_IN_CONF

32-bit bit array

Reads all configured input ranges

$A_DP_OUT_CONF

32-bit bit array

Reads all configured output ranges

Valid I/O ranges for part programs / synchronized actions

Each system variable is a 32-bit bit array. Each bit is assigned to an I/O range.

Bit <n> ≙ machine data index <n> ≙ I/O range <n+1>

Bit <n> == 1 ⇒ The I/O range <n+1> is valid. Reading/writing via part programs / synchronized

actions.

System variable

Type

Meaning

$A_DP_IN_VALID

32-bit bit array

Reads all valid input ranges

$A_DP_OUT_VALID

32-bit bit array

Reads all valid output ranges

State of an I/O range

The state of an I/O range can be read via the following system variables.

System variable

Type

Meaning

$A_DP_IN_STATE[<n>]

INT

Reads the state of the input range

$A_DP_OUT_STATE[<n>]

Reads the state of the output range

Basic functions

804

Function Manual, 10/2020, 6FC5397-2GP40-0BA1

Digital and analog NC I/O

14.4 Direct I/O access without PLC

System variable

Type

Meaning

<n> = index of the I/O range

State

0: I/O range has not been configured

1: I/O range could not be activated

2: I/O range is available

3: I/O range is currently not available

Length of an I/O range

The configured length of an I/O range can be read via the following system variables.

System variable

Meaning

$A_DP_IN_LENGTH[<n>]

Reading the length of the input data range

$A_DP_OUT_LENGTH[<n>]

Reading the length of the output data range

<n> = index of the I/O range

Constraints

• A preprocessing stop is triggered in the channel when reading/writing from a part program.

• To ensure data consistency during programming from the part program and the

synchronized actions, the PROFINET I/O data is accessed which is kept consistent for the

respective IPO cycle.

• If the same PROFINET I/O data is to be write-accessed several times within an interpolation

cycle (e.g. synchronized actions, access from different channels, etc.), then the data of the

last write access is valid.

• The PROFINET I/O data to be written is output at the PROFI I/O only after the corresponding

IPO cycle.

• The <b> (RangeOffset) indicates the place (byte offset) within the I/O range as of which the

data access is to be started. Data types can be read/written at any byte offset within the I/O

range. Read/write accesses which exceed the configured limits of the respective I/O range are

rejected with the generation of an alarm (17030).

• Via the machine data MD10502 $MN_DPIO_RANGE_ATTRIBUTE_IN or MD10512

$MN_DPIO_RANGE_ATTRIBUTE_OUT (see "Parameter assignment (Page 802)"), the display

format (little/big endian) for $A_DPx_IN[<n>,<b>] or $A_DPx_OUT[<n>,<b>] system

variables can be defined for the read/write direction as well as for each individual I/O range.

14.4.4

Supplementary conditions

Parallel writing of the NC and PLC

Parallel writing of I/O outputs by the NC via direct access and from the PLC user program results

in a random, mutual overwriting of the output values. The application is therefore not

permitted, but cannot be prevented on the control.

Basic functions

Function Manual, 10/2020, 6FC5397-2GP40-0BA1

805

Digital and analog NC I/O

14.5 Data lists

Examples

check:

; Jump marker

IF $A_DP_OUT_STATE[5]==2 GOTOF write

; If data range valid; => jump to

N15

GOTOB check

; Jump back to check

write:

; Jump marker

$A_DPB_OUT[5,6]=128

; Writing the data byte

check:

; Jump marker

IF $A_DP_OUT_CONF==$A_DP_OUT_VALID GOTOF write

; If data range valid

; => jump to N15

SETAL(61000)

; Set alarm no. 61000

write:

; Jump marker

$A_DPB_OUT[5,6]=128

; Writing the data byte

check:

; Jump marker

IF $A_DP_OUT_VALID B_AND ’B100000’ GOTOF write

; If data range valid

; => jump to N15

SETAL(61000)

; Set alarm no. 61000

write:

; Jump marker

$A_DPB_OUT[5,6]=128

; Writing the data byte

R1=$A_DP_OUT_LENGTH[5]

; Length of the I/O-range (slot) in bytes

;Result: R1 = 32

14.5

Data lists

14.5.1

Machine data

14.5.1.1

General machine data

Number

Identifier: $MN_

Description

10300

FASTIO_ANA_NUM_INPUTS

Number of active analog NC inputs

10310

FASTIO_ANA_NUM_OUTPUTS

Number of active analog NC outputs

10320

FASTIO_ANA_INPUT_WEIGHT

Weighting factor for analog NC inputs

10330

FASTIO_ANA_OUTPUT_WEIGHT

Weighting factor for analog NC outputs

10350

FASTIO_DIG_NUM_INPUTS

Number of active digital NC input bytes

10360

FASTIO_DIG_NUM_OUTPUTS

Number of active digital NC output bytes

Basic functions

810

Function Manual, 10/2020, 6FC5397-2GP40-0BA1

Digital and analog NC I/O

14.5 Data lists

Number

Identifier: $MN_

Description

10362

HW_ASSIGN_ANA_FASTIN

Hardware assignment of external analog NC inputs

10364

HW_ASSIGN_ANA_FASTOUT

Hardware assignment of external analog NC outputs

10366

HW_ASSIGN_DIG_FASTIN

Hardware assignment of external digital NC inputs

10368

HW_ASSIGN_DIG_FASTOUT

Hardware assignment of external digital NC outputs

10500

DPIO_LOGIC_ADDRESS_IN

Logical slot address of the PROFIBUS I/O

10501

DPIO_RANGE_LENGTH_IN

Length of the PROFIBUS I/O range

10502

DPIO_RANGE_ATTRIBUTE_IN

Attributes of the PROFIBUS I/O

10510

DPIO_LOGIC_ADDRESS_OUT

Logical slot address of the PROFIBUS I/O

10511

DPIO_RANGE_LENGTH_OUT

Length of the PROFIBUS I/O range

10512

DPIO_RANGE_ATTRIBUTE_OUT

Attributes of the PROFIBUS I/O

10530

COMPAR_ASSIGN_ANA_INPUT_1

Hardware assignment of NC analog inputs for comparator byte 1

10531

COMPAR_ASSIGN_ANA_INPUT_2

Hardware assignment of NC analog inputs for comparator byte 2

10540

COMPAR_TYPE_1

Parameterization for comparator byte 1

10541

COMPAR_TYPE_2

Parameterization for comparator byte 2

14.5.1.2

Channelspecific machine data

Number

Identifier: $MC_

Description

21220

MULTFEED_ASSIGN_FASTIN

Assignment of input bytes of NC I/Os for "multiple fee-

drates in one block"

14.5.2

Setting data

14.5.2.1

General setting data

Number

Identifier: $SN_

Description

41600

COMPAR_THRESHOLD_1

Threshold values for comparator byte 1

41601

COMPAR_THRESHOLD_2

Threshold values for comparator byte 2

14.5.3

System variable

Identifier

Description

$A_IN

Digital NC input

$A_OUT

Digital NC output

$A_INA

Analog NC input

$A_OUTA

Analog NC output

$A_DPB_IN

Reads a data byte (8 bit)

Basic functions

Function Manual, 10/2020, 6FC5397-2GP40-0BA1

811

Digital and analog NC I/O

14.5 Data lists

Identifier

Description

$A_DPW_IN

Reads a data word (16 bit)

$A_DPSB_IN

Reads a data byte (8 bit)

$A_DPSW_IN

Reads a data word (16 bit)

$A_DPSD_IN

Reads a double word (32 bit)

$A_DPR_IN

Reads input data (32 bit REAL)

$A_DPB_OUT

Writes a data byte (8 bit)

$A_DPW_OUT

Writes a data word (16 bit)

$A_DPSB_OUT

Writes a data byte (8 bit)

$A_DPSW_OUT

Writes a data word (16 bit)

$A_DPSD_OUT

Writes a double word (32 bit)

$A_DP_IN_VALID

Reads all valid input ranges

$A_DP_OUT_VALID

Reads all valid output ranges

$A_DP_IN_STATE[<n>]

Reads the state of the input range

$A_DP_OUT_STATE[<n>]

Reads the state of the output range

$A_DP_IN_LENGTH[<n>]

Reads the length of the input data range

$A_DP_OUT_LENGTH[<n>]

Reads the length of the output data range

14.5.4

Signals

14.5.4.1

Signals to NC

Signal name

SINUMERIK 840D sl

SINUMERIK 828D

Disable of the digital NC inputs

DB10.DBB0/122/124/126/128

DB2800.DBB0/1000

Setting of the digital NC inputs from the PLC

DB10.DBB1/123/125/127/129

DB2800.DBB1/1001

Disable of the digital NC outputs

DB10.DBB4/130/134/138/142

DB2800.DBB4/1008

Overwrite mask of the digital NC outputs

DB10.DBB5/131/135/139/143

DB2800.DBB5/1009

Setting value of the digital NC outputs from the PLC

DB10.DBB6/132/136/140/144

DB2800.DBB6/1010

Input mask of the digital NC outputs

DB10.DBB7/133/137/141/145

DB2800.DBB7/1011

Disable of analog NC inputs

DB10.DBB146

-

Input mask for analog NC inputs

DB10.DBB147

-

Setting value from PLC for the analog NC inputs

DB10.DBB148-163

-

Overwrite mask for the analog NC outputs

DB10.DBB166

-

Input mask for analog NC outputs

DB10.DBB167

-

Disable of NC outputs

DB10.DBB168

-

Setting value from PLC for the analog NC outputs

DB10.DBB170-185

-

Basic functions

812

Function Manual, 10/2020, 6FC5397-2GP40-0BA1

Digital and analog NC I/O

14.5 Data lists

14.5.4.2

Signals from NC

Signal name

SINUMERIK 840D sl

SINUMERIK 828D

Actual value for digital NCK inputs

DB10.DBB60/186-189

DB2900.DBB0/1000

Setpoint for digital NCK outputs

DB10.DBB64/190-193

DB2900.DBB4/1004

Actual value for analog NCK inputs

DB10.DBB194-209

-

Setpoint for analog NCK outputs

DB10.DBB210-225

-

Basic functions

Function Manual, 10/2020, 6FC5397-2GP40-0BA1

813

Distributed systems

15

15.1

Brief description

15.1.1

Several operator panels on several NCUs (T:M:N)

Under certain circumstances, a single operator control and monitoring station may not be

sufficient for complex plants and machines. Therefore, several operator control and monitoring

stations in a SINUMERIK system network (Ethernet) can be connected to several numerical

controls (NCU) via a PCU in such a way that they enable flexible and distributed operation and

monitoring of the entire system.

The following figure provides an overview of the components that currently can be connected

in a system network to form an operator control and monitoring system T:1:N. Meanings:

• T: Thin Client Unit (TCU) or handheld unit HT8/HT10 (connected with the PCU)

• M: Man Machine Control (MMC), e.g. PCU 50.x with SINUMERIK Operate

• N: Numeric Control Unit (NCU), e.g. NCU 7x0.3 PN

2SHUDWRU SDQHO IURQW 23 [[[

2SHUDWRU SDQHO IURQW 23 [[[

+DQGKHOG XQLW

ZLWK

ZLWK

+7

7KLQ &OLHQW 8QLW 7&8

7KLQ &OLHQW 8QLW 7&8

0DFKLQH FRQWURO

0DFKLQH FRQWURO SDQHO

SDQHO

0&3 [[[

,QGXVWULDO (WKHUQHW

0&3 [[[

3& XQLW 3&8

[

,( 6ZLWFK

ZLWK

6&$/$1&( [[[

8VHU LQWHUIDFH

6,180(5,. 2SHUDWH

6,180(5,.

'

6,180(5,.

'

6,180(5,.

'

6,180(5,.

'

VO

VO

VO

VO

1&8 [

31

1&8 [

31

1&8 [

31

1&8 [

31

Basic functions

Function Manual, 10/2020, 6FC5397-2GP40-0BA1

815

Distributed systems

15.1 Brief description

handled as a local logical machine axis, e.g. master value for position/feed couplings, NCU-local

axis interchange.

15.1.2.4

Lead link axes

If in conjunction with the coupling functions of the generic coupling, all interpolators, i.e. the

setpoint-creating/processing channels, the leading and following axes/spindles, are on the same

NCU, the use of a lead link axis is not required. The machine axes of the leading and/or following

axes/spindles can also be connected link axes to different NCUs.

Application

A lead link axis is always required when not all interpolators of a coupling group are on the same

NCU. The lead link axis provides an image of the leading axis/spindle or the master value for the

local interpolators, on another NCU. Starting from this master value, the setpoints of the

following axes/spindles are then generated by the interpolators on this NCU.

Further application

A lead link axis is also used if more machine axes are involved in a coupling than are available

absolutely or relatively on an NCU for the coupling.

Further information

Function Manual Axes and Spindles, Axis couplings

15.1.2.5

Dependencies

In order that several axes can be traversed in an interpolatary relationship, it is essential that the

setpoints generated by the interpolator of the traversing channel be transferred to the position

control at the same time.

During the transfer of the setpoints via the NCU link, for example, for a link axis there is a delay

of one interpolator cycle in relation to the setpoint of a local axis. The delay must be

compensated by a suitable increase of the buffer between the interpolator and the position

controller :

MD18720 $MN_MM_SERVO_FIFO_SIZE = <value> = <default value + compensation value>

Function

Compensation value

Link axis

One interpolator cycle must be compensated on all NCUs with axes that inter-

polate with a link or container link axis.

Container-link axis

Compensation value = 1

Lead-link axis

Two interpolator cycles must be compensated on the NCU of the leading axis

that generates the setpoints for the lead link axis.

Compensation value = 2

Basic functions

Function Manual, 10/2020, 6FC5397-2GP40-0BA1

819

Distributed systems

15.1 Brief description

1&8 /LQN YLD 352),1(7

1&8

6HWSRLQW WUDQVIHU LV QRW FXUUHQWO\ UHTXLUHG

1&8

/LQN PRGXOH

/LQN PRGXOH

6SLQGOH 06

1&8

6SLQGOH 06

1&8

5RWDU\ WDEOH

'ULYH

075

'ULYH

8QORDGLQJ VWDWLRQ

/RDGLQJ VWDWLRQ

6SLQGOH

06

=

6SLQGOH

06

;

=

0DFKLQLQJ VWDWLRQ

;

0DFKLQLQJ VWDWLRQ

Figure 15-2

Fig. 1: Initial situation

1&8 /LQN YLD 352),1(7

1&8

6HWSRLQW WUDQVIHU 1&8

! 1&8

VSLQGOH 06

1&8

/

LQN PRGXOH

/

LQN PRGXOH

6SLQGOH 06

1&8

6SLQG

OH 06

1&8

5RWDU\ D[LV 075

'ULYH

'ULYH

/RDGLQJ VWDWLRQ

8QORDGLQJ VWDWLRQ

6SLQGOH 06

=

6SLQGOH 06

;

=

0DFKLQLQJ VWDWLRQ

;

0DFKLQLQJ VWDWLRQ

Figure 15-3

Fig. 2: Location after rotation by one position

Basic functions

Function Manual, 10/2020, 6FC5397-2GP40-0BA1

821

Distributed systems

15.2 NCU link

Parameterization (schematic)

General

Programmed channel axes in the part programs of both NCUs: X, Z, S1

NCU1

Machine axes defined in the NCU:

Local:

X1, Z1

Axis container:

MS1, MS2

NCU2

Machine axes defined in the NCU:

Local:

X1, Z1

Axis container:

MS3, MS4

Initial setting

Rotation of the MTR (rotary table) rotary

axis by one position

(Fig. 1)

(Fig. 2)

NCU1

Machining station 1: X1, Z1, MS2

Diagram showing the channel axes programmed in the part program:

X → X1 and Z → Z1

X → X1 and Z → Z1

S1 → MS2

S1 → MS1

NCU2

Machining station 2: X1, Z1, MS2

Diagram showing the channel axes programmed in the part program:

X → X1 and Z → Z1

X → X1 and Z → Z1

S1 → MS3

S1 → MS2 (link axis)

15.2

NCU link

15.2.1

Link communication

15.2.1.1

General information

'DWD H[FKDQJH E\ 1&8 /LQN YLD 352),1(7

1&8

1&8

1&8Q

1&8

1&8

1&8

/LQN PRGXOH

/LQN PRGXOH

/LQN PRGXOH

Figure 15-4

Link communication (principle)

Basic functions

822

Function Manual, 10/2020, 6FC5397-2GP40-0BA1

Distributed systems

15.2 NCU link

Quantity structure: NCU 7x0.3 PN

As standard, a maximum of three NCUs can be interconnected to form a link group.

Note

For a specific project, on request to your local regional Siemens representative an NCU-link group

with more than three NCUs is possible. Without project-specific supplements, more than three

NCUs are rejected with Alarm 380020.

NCU link and Safety Integrated

The following figure shows a constellation with two NCUs and two machine axes, of which the

MA2 machine axis of the NCU2 is traversed as link axis for NCU1. The Safety Integrated function

monitors the safety-related aspects of both axes.

1&8 /LQN YLD 352),1(7

6DIHW\ ,QWHJUDWHG

(WKHUQHW

352),1(7

1&8

1&8

352),%86

1&.

1&.

&KDQQHO

1

*

)

1

;

=

&KDQQHO D[HV

;

=

0'

/RJ 0DFKLQH D[LV LPDJH

0'

0DFKLQH D[HV

0'

&RQWURO8QLW

&RQWURO8QLW

0RWLRQ

0

RWLRQ

0RQLWRU

0RQLWRU

00

60

60

0

0

63/

63/

3/&

3/&

;

;

;

;

3

3

3

0

0

)6HQG )5HFY

1&8 ORFDO D[LV

31

/LQN D[LV

31

352),VDIH

352),VDIH

)B',

)B'2

',

'2

',

'2

)B',

)B'2

Figure 15-5

NCU link and Safety Integrated

The safety-related input signals (F_DI) of both NCUs can be acquired, linked via the safe

programmable logic (SPL) and exchanged using the safety-related CPU-CPU communication

(FSend/FRecv).

Basic functions

824

Function Manual, 10/2020, 6FC5397-2GP40-0BA1

Content      ..     27      28      29      30     ..