FANUC AC SERVO MOTOR ai series, AC SPINDLE MOTOR ai series, SERVO AMPLIFIER ai series. MAINTENANCE MANUAL

α+ series SERVO AMPLIFIER for 30+-B Start-up and Maintenance manual

1. Type of applied technical documents

Name

α+ series SERVO AMPFLIER for 30+-B Start-up and Maintenance manual

Spec.No./Ver.

B-65285EN/03-02/04

2. Summary of change

Group

Name / Outline

New,Add

Applicable

Correct,Del

Date

Basic Function

It is added that warning level of insulation

Add

Oct. 2012

deterioration detection function can be set by

parameters. Added page : 64

Optional

Function

Unit

Maintenance

Parts

Notice

Correction

Another

2012.09.06

Yamada

6,8,10,22,23,26,76 changed S. Hanyuu

α+ series SERVO AMPLIFIER

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for 30+-B Start-up and

4.1 paragraph is corrected

2011.10.12

Yamamoto

M.Takeshita

Maintenance manual

2.2 paragraph is added

2012.10.25

Tateda

Page 64 is added

A.Hirai

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INDEX

1. START-UP

1.1. COMPONENTS AND ITEMS TO BE CHECKED AT START-UP

1.2. INITIALIZING PARAMETERS

1.3. TROUBLESHOOTING AT START-UP

2. TROUBLESHOOTING

2.1. TROUBLESHOOTING PROCEDURES

2.2. SMART TROUBLE SHOOTING FUNCTION

2.3. ALARM NUMBER

3. PERIODIC MAINTENANCE OF SERVO AMPLIFIER

3.1. PERIODIC MAINTENANCE ITEM

3.2. INSULATION DETERIORATION DETECTION FUNCTION

3.3. HOW TO REPLACE THE BATTERY FOR THE ABSOLUTE PULSECORDER

4. MAINTENANCE PARTS AND REPLACEMENT METHODS

4.1. HOW TO REPLACE FAN MOTORS

4.2. HOW TO REPLACE FUSES ON PRINTED-CIRCUIT BOARDS

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1. START-UP

1.1.

COMPONENTS AND ITEMS TO BE CHECKED AT START-UP

1.1.1

200 V Series Configuration

Power Supply

Spindle Amplifier

Servo Amplifier

αi PS

αi SP

αi SV

DC link

24V Power

24V,0V

Supply

(note 1)

Power Supply

Monitor 3Φ

Coil Power Supply

up to 240VAC

Relay for

magnetic

or 24VDC

contactor

Circuit

Lightning

breaker 2

surge

protector

3φ

Noise

Circuit

Magnetic

AC reactor

filter

breaker 1

contactor

Input

breaker

Spindle motor

Servo motor

200 to 240 VAC

3φ

NOTE

1. Before wiring the power supply monitor, connect a circuit

breaker or fuse so that the wiring can be protected.

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1.1.2

400 V Series Configuration

Power Supply

Spindle Amplifier

Servo Amplifier

αi PS

αi SP

αi SV

DC link

24V Power

24V,0V

Supply

(note 1)

Power Supply

Monitor 3Φ

Coil Power Supply

up to 240VAC

Relay for

magnetic

or 24VDC

contactor

Circuit

Lightning

breaker 2

surge

protector

3φ

Noise

Circuit

Magnetic

AC reactor

filter

breaker 1

contactor

Input

breaker

Spindle motor

Servo motor

400 to 480 VAC

3φ

NOTE

1. Before wiring the power supply monitor, connect a circuit

breaker or fuse so that the wiring can be protected.

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Detail of LED Display of α+ PS

ALARM

ERROR

STATUS

Contents

LED

Control power has not been supplied. Fault of hardware.

LED is off

For detail, refer to “1.3.1 Power supply”

The software series/edition is displayed at 4 sessions for about 4

seconds after the power is turned on.

First 1 sec: Upper 2 digits of the software series

Number /

Second 1 sec: Lower 2 digits of the software series

alphabet

Third 1sec : Upper 2 digits of software version

Forth 1sec : Lower 2 digits of software version

Example) In case of Software serie/version 9G00/01.0

→

－－

Serial communication with the servo or spindle amplifier is being

Blink

established

－－

Serial communication with the servo or spindle amplifier is

Lighting

established

Start up main power (Precharging)

Blink

Ready main power

Number

Lighting

Alarm status

01～

Number

Warning status

01～

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Detail of LED Display of α+ SV

LED

Contents

Control power has not been supplied. Fault of hardware

LED is off

For detail, refer to “1.3.2 Servo amplifier”

The software series/version is displayed at 4seconds after the

Number

power is turned on.

Lighting

Example) In case of software series/version is 9H00/01.0

→

－

Self-Check

Blink

－

SV is waiting for a ready signal

Lighting

－

Measuring isolation resistor

Blink

－

SV is ready to operate

Lighting

Number

Alarm state

1～

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Detail of LED Display of α+ SP

ALARM

ERROR

STATUS

Contents

LED

Control power has not been supplied. Fault of hardware.

LED is off

For detail, refer to “1.3.3 Spindle amplifier”

For about 3.0 s after the control power supply is switched on, the

spindle software series No. and the spindle software edition No. are

indicated.

First 1 sec

Number /

Second 1 sec : The lower two digits of the spindle software series

alphabet

No.

Third 1sec

: The spindle software edition No.

Example) A0: Software series No. 9DA0

04: Software edition D

→

The CNC has not been switched on.

－－

The machine is waiting for serial communication and parameter

Blink

loading to end.

－－

Parameter loading has ended.

Lighting

The motor is not supplied with power.

The motor is supplied with power.

Alarm status

Number

Lighting

The SPM is not operable.

01～

See Chapter 1 of Part II.

Number

Warning status

Lighting

01～

Incorrect parameter setting or improper sequence.

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1.1.6

Check Items

No.

Description

Check method

Servo amplifier installation status check

Servo amplifier and

Check the combination of the servo amplifier and servo motor referring to

servo motor

Section 4.1 of “Į+ series Servo Amplifier Descriptions” (B-65282EN/06).

specifications

Flange packing

Check the supplied packing is attached properly and that there is no gap

between the control panel and amplifier flange.

Maintenance area

Please keep a maintenance area for the amplifier.

For details, refer to Section 5.1 of the document (B-65282EN/06-18) attached

to “Į+ series Servo Amplifier Descriptions”.

Preventing contact with

Check a protective plate is attached to the DC link terminal board properly and

any current-carrying

the terminal board cover is locked.

section

For details, refer to Section 5.3 of the document (B-65282EN/06-18) attached

to “Į+ series Servo Amplifier Descriptions”.

Order of amplifier

As for the α+SP45HV or the larger model, there is a rule to place the

locations

amplifiers.

For details, refer to Section 5.3 of the document (B-65282EN/06-18) attached

to “Į+ series Servo Amplifier Descriptions”.

Prevent cutting fluid

Take a measure to prevent electroconductive, flammable, and corrosive

intrusion

material as well as mist and water drop from getting in the unit. For the detail

of an effective closeness of the control panel, refer to Appendix G of “Į+

series Servo Amplifier Descriptions” (B-65282EN/06).

Servo amplifier wiring status check

Tightening terminal

When connecting wires to the servo amplifier terminal board, be sure to

board screws

tighten the screws with a proper torque. For the detail of the tightening torque

for the terminal board screws, refer to Subsection 5.5.2.9 of “Į+ series Servo

Amplifier Descriptions” (B-65282EN/06).

Connecting a protective

Use a proper cable for grounding in order to prevent electrical shocks at a

ground

ground fault. For details, refer to Subsection 9.3.1.7 of “Į+ series Servo

Amplifier Descriptions” (B-65282EN/06).

Installing a lightning

In order to prevent damage due to a surge voltage applied to the input power

surge protector

supply, install a lightning surge protector. For details, refer to Appendix A of

“Į+ series Servo Amplifier Descriptions” (B-65282EN/06).

Measure for noise

Check that ground wires, including feedback cable shielding clamps, are

connected to proper places to maintain a stable operation of the machine. For

details, refer to Section 5.2 of “Į+ series Servo Amplifier Descriptions”

(B-65282EN/06) and Subsection 7.2.5 of the document (B-65282EN/06-18)

attached to “Į+ series Servo Amplifier Descriptions”. Also refer to Subsection

7.2.8 if the 24 V power supply is shared between the servo amplifier and the

CNC.

(Continued on the next page)

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(Continued from the previous page)

Order of motor power

If the order of motor power line phases is incorrect, there is a risk of an

line phases

unexpected behavior of motor. So, make sure that the power wires are

connected to the motor properly.

Checking the axis where

If the axis where motor feedback and power wires are connected is incorrect,

motor feedback and

there is a risk of an unexpected behavior of motor. So, make sure that the

power wires are

connection is correct.

connected

Battery connection

Do not connect the built-in batteries in parallel. Please make sure, if the

built-in batteries are used with an amp-to-amp battery connection cable

(CXA2A/B or BATL (B3)) attached, they may be connected in parallel. For

details, refer to Subsection 9.3.2.10 of “Į+ series Servo Amplifier

Descriptions” (B-65282EN/06).

Operation start-up check

Power supply voltage

Before turning power on, check that the power supply voltage is in its proper

check

range. For details of the power supply voltage specification, refer to Section

2.1 of “Į+ series Servo Amplifier Descriptions” (B-65282EN/06).

Ground potential check

The 400 V servo amplifier supports only neutral grounding. For details, refer

to Section 2.1 of “Į+ series Servo Amplifier Descriptions” (B-65282EN/06).

Ground fault interrupter

Use a ground fault interrupter that supports inverters. For explanations about

setting

leakage current, refer to Section 5.1 of “Į+ series Servo Amplifier

Descriptions” (B-65282EN/06).

Control power check

Check that the voltage of the 24 V power supply for amplifiers is in its proper

range and the selected current capacity is proper. For details, refer to Section

4.5 and Subsection 7.2.8 of the document (B-65282EN/06-18) attached to “Į+

series Servo Amplifier Descriptions”.

Parameter setting

Set initial parameters while referencing Section 1.2 of this document.

Handling early failures

Solve start-up problems, such as being impossible to turn power on, motor

failing to rotate, and alarm occurrence, while referencing Section 1.3 of this

document.

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1.2.

INITIALIZING PARAMETERS

1.2.1

Common Power Supply

The common power supply (PS) for the 30+-B series is controlled by software. So, information concerning the

power supply can be known on the CNC. Using these informations makes it possible to diagnose failures resulting

from power supply fluctuation.

Unlike the servo amplifier (SV) or spindle amplifier (SP), PS cannot communicate directly with CNC. So, the

power supply information is transferred through SV or SP to CNC.

1.2.1.1 Amplifier group number

A group of one PS and the servo and spindle amplifiers connected to the PS is defined as an “amplifier group”.

This means that a system having more than one PS has more than one amplifier group. A unique number is

assigned to each amplifier group. The unique number is described as “amplifier group number”.

1.2.1.2 PS control axis

The PS is connected to amplifiers via the CXA2x connector. In this connection, let us refer to an axis driven by

the servo/spindle amplifier nearest to the PS is described as “PS control axis”.

The power supply information mentioned above is transferred through this PS control axis to the CNC.

power supply information

SV or SP

PS control

axis

amplifier group "1"

power supply information

SV or SP

PS control

axis

amplifier group "2"

power supply information

SV or SP

PS control

axis

amplifier group "N"

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1.2.1.3 Parameter setting for specifying a PS control axis

Using the servo and spindle amplifiers for the 30+-B series requires the following procedure.

1.2.1.3a Parameter setting procedure

In order for the CNC software to recognize the PS control axis, it is necessary to set an amplifier group number

in either of the following parameters:

Parameter No. 2557 in case the PS control axis is a servo axis

Parameter No. 4657 in case the PS control axis is a spindle axis

This setting can be made automatically with the following procedure.

(1) Set bit 0 (APS) of parameter No. 11549 to 1.

The message “PW0000 POWER MUST BE OFF” appears on the alarm message screen. So turn the CNC

power off and on again. Parameters Nos. 2557 and 4657 are automatically set with an amplifier group number,

thus completing PS control axis parameter setting.

* Upon completion of automatic parameter setting, bit 0 of parameter No. 11549 returns to 0.

* If the amplifier configuration is changed, the alarm “PS CONTROL AXIS ERROR” occurs just after CNC

start-up. So, perform automatic parameter setting again.

Related parameter

Description

No.11549#0(APS)

Setting this parameter to 1 causes an amplifier group number to be

automatically set in PS control axis parameter No. 2557 or 4657.

No.2557

In case the servo axis is a PS control axis, an amplifier group number

is set for the PS control axis.

No.4657

In case the spindle axis is a PS control axis, an amplifier group

number is set for the PS control axis.

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1.2.2

Servo Amplifiers

1.2.2.1 Servo parameter initialization procedure

The initialization procedure for servo amplifiers and servo motors is described below. For details of each item of

the procedure, refer to “FANUC AC SERVO MOTOR α+ series/FANUC AC SERVO MOTOR β+ series/FANUC

LINEAR L+S series/FANUC BUILT-IN SERVO MOTOR D+S series Parameter Manual” (B-65270).

Preparation

- In emergency stop state, switch on CNC

- Set parameter write enable

- Servo adjusting screen

Setting of servo parameter

Setting

Initialization bits

Motor No.

AMR

CMR

Flexible feed gear

Move direction

Velocity pulse

Reference counter

Full closed loop

Servo loop gain

Turn power off then on

Absolute position detection setting

End of parameter setting

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1.2.2.2 Multi-axis amplifier start-up

The conventional multi-axis amplifier cannot become ready unless the start-up conditions for all axes are satisfied.

However, the multi-axis servo amplifier for the 30i-B series can become ready for individual axes separately if the

start-up conditions for them are satisfied.

Multi-axis amplifier ready status indicator

The 7-segment LED indicator on the multi-axis servo amplifier for the 30i-B series can indicates “0.” (dotted zero)

meaning a ready status for some axes and a not-ready status for others as well as “0” meaning a ready status for all

axes and “-” meaning a not-ready status for all axes.

7-segment LED

Amplifier status

Description

indicator

Not ready for all axes (same as conventional)

－

Not ready (for all axes)

All axes are braked dynamically and inoperable.

Ready for all axes (same as conventional)

０

Ready (for all axes)

All axes are operable.

Ready for some axes and not ready for others.

This indication differs from the all-axis ready status

indication in that the dot lights.

Ready (except for some

０．

Only the axes for which the amplifier is ready are

axes)

operable.

The axes for which the amplifier is not ready are braked

dynamically.

・Multi-axis amplifier behavior at alarm occurrence

If the former multi-axis servo amplifier detects an alarm even on one axis, it becomes Not ready for all axes

regardless of what the alarm is like and applies a dynamic brake to all the axes to bring them to halt. If the

multi-axis servo amplifier for the 30i-B series detects an individual-axis alarm (such as an IPM alarm) on any axis,

however, it becomes Not ready only for that axis and stays ready for the other axes in the servo amplifier.

・No restriction on the multi-axis amplifier at alarm occurrence

Even if an alarm occurs on the brake control function, quick stop function, or the Gravity-axis drop prevention

function at an emergency stop for any axis, unlike the former multi-axis servo amplifier, there is no restriction on

the multi-axis servo amplifier for the 30i-B series regarding any application using the operation of the other axes.

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[Behavior of axes (normal axes) at alarm occurrence on any other axis]

Behavior of normal axes

Alarm

Servo amplifier for

Conventional servo amplifier

the 30i-B series

<1>

Alarm (such as excessive-error alarm）

Possible to delay the ready status

Possible to delay the

detected by the servo or CNC software

of the servo amplifier.*

ready status of the

servo amplifier.*

<2>

Individual-axis alarm detected by the servo

Possible to delay the ready status

Possible to delay the

amplifier

of the servo amplifier only for the

ready status of the

<1> Abnormal Motor current

one-axis amplifier.*

servo amplifier for all

<2> IPM alarm

(Impossible to delay the ready

amplifiers.*

<3> DB relay abnormal alarm

status of the servo amplifier if a

multi-axis amplifier detects an

alarm for axes of the same

amplifier.)

<3>

Alarms other than <1> or <2> above

Becomes Not ready instantly.

Becomes Not ready

instantly.

*It is possible to pull up normal vertical axes while the ready status of the servo amplifier is being delayed.

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・Supporting the axis detach function for multi-axis amplifiers

Conventionally, the axis detach function has been applicable only to axes driven by a one-axis servo amplifier. Now,

the detach function is applicable to each axis driven by the multi-axis servo amplifier for the 30i-B series.

・Setting dummy axes for multi-axis amplifiers

Starting up a specific axis on the conventional multi-axis amplifier requires attaching a dummy connector to the

axes not in use. With the servo amplifier for the 30i-B series, it is possible to start up only arbitrary axes. So, it is

unnecessary to attach a dummy connector to any axis not in use.

・Sharing a multi-axis amplifier with two or more paths

If the conventional multi-axis amplifier is shared among multiple paths, it is necessary to input a signal for

ignoring the VRDY-OFF alarm when the amplifier becomes Not ready for an axis being used by one path, so that

it will not become Not ready for axes in use by the other paths. For the servo amplifier for the 30i-B series, it is

unnecessary to input such a signal.

CAUTION

1. Note on synchronization control and tandem control

If an alarm occurs on one of the axes used on a multi-axis amplifier under synchronization or tandem

control, it is necessary for the multi-axis amplifier to become Not ready immediately also for the other

axes in order to prevent machine distortion. To meet this requirement, be sure to enable the servo

software’s “servo alarm 2-axis simultaneous monitoring function” for axes under synchronization or

tandem control.

In some cases, implementing synchronization or tandem control for two axes driven by the

conventional multi-axis amplifier caused the amplifier to be become Not ready for the two axes

simultaneously at alarm occurrence as if the “servo alarm 2-axis simultaneous monitoring function” had

operated.

Because the ready status conditions of the multi-axis amplifier for the 30i-B series for each axis are

independent of one another, using the multi-axis amplifier does not work in place of the “servo alarm

2-axis simultaneous monitoring function”. For this reason, be sure to enable the “servo alarm 2-axis

simultaneous monitoring function” for axes under synchronization or tandem control also when the

multi-axis amplifier is used. Refer to “Parameter Manual” for detailed descriptions of the “servo alarm

2-axis simultaneous monitoring function” and the related parameter setting.

2. If an alarm (such as a DC link low-voltage alarm) common to all axes occurs, any axis driven by the

multi-axis amplifier can be the cause of the alarm in the same manner as with the conventional

amplifier, resulting in the amplifier becoming Not ready simultaneously for all axes and a dynamic

brake being applied to all axes to bring them to halt.

3. If an emergency stop signal (input signal to the connector CX4 of the PS) is input, the amplifier

becomes Not ready for all axes and applies a dynamic brake to all axes to bring them to halt.

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1.2.3

SPINDLE AMPLIFIER

1.2.3.1 PARAMETER FOR SPINDLE SERIAL OUTPUT

Only the list of parameters for SPINDLE SERIAL OUTPUT is mentioned.

As for the detal of these parameter, refer to 11.2 “SPINDLE SERIAL OUTPUT” of FANUC Series 30+ / 31+ /

32+ -MODEL B CONNECTION MANUAL (FUNCTION)

Parameter

Description

number

30i-B

（Analog/Serial）Selection of Spindle

3716#0

（Set to “1”）

The multi-spindle control function

3702#1

（The multi-spindle control function is used

/not used）

3717

The spindle amplifier number of each spindle

3718

Subscript for display of spindle (main spindle)

3719

Subscript for display of spindle (sub-spindle)

Note

When a serial spindle is used, the option for spindle serial

output is required.

About FSSB Setting,

refer to 1.4.4「FSSB Setting」of FANUC Series 30+ / 31+ / 32+ -MODEL B CONNECTION MANUAL

(FUNCTION).

1.2.3.2 Automatic Spindle Parameter Initialization

An automatic setup of spindle parameters (No.4000-No.4799) is described as follow.

Note

When you do not want to initialize the adjusted parameters,

don’t perform automatic spindle parameter initialization.

1.2.3.2a Parameter List

Parameter No.

Description

30i-B

4019#7

Function for automatically initializing spindle

parameters.

4133

Spindle motor model code

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1.2.3.2b Procedure for automatic spindle parameter initialization

Perform automatic spindle parameter initialization by following the procedure below.

<1> Set the model code for the desired motor for automatic parameter initialization.

Parameter No.

Description

30i-B

4133

Model code

Note

1 The control method usable with the α+ series spindle is

spindleHRV control only. The conventional control method is

not supported.

2 About the model code of each motor,

refer to FANUC AC SPINDLE MOTOR α+ series PARAMETER

MANUAL B-65280JA.

3 When using a spindle motor that has no model code, set model

code “300” (“400” for a spindle motor with speed range

switching control) for automatic parameter setting, then

manually input data according to the parameter table for each

motor model.

<2> Set the relevant parameter to enable automatic spindle parameter initialization.

Parameter No.

Description

30i-B

4019#7

Note

This bit is reset to its original value after automatic parameter

initialization.

<3> Turn the CNC off, then on again. Then, the spindle parameters specified with a model code are automatically

initialized.

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1.3.

Troubleshooting at Start-up

1.3.1

Power supply

(1) The LED on power supply is off

When the LED on power supply does not become on after the main circuit breaker is turned on.

No.

Cause of trouble

Check method

Action

The 24V control power is

Check the voltage of the external

Check whether the external

not supplied.

power supply (24V).

power supply is faulty.

Check whether the cable attached to

Check the cable attached to

The cable is defective.

the connector CXA2A/B is

the connector CXA2A/B.

disconnected or short-circuited.

The power is externally

Check whether the cable for 24V

connected to 0 V, GND,

Replace or repair the cable.

power is short-circuited

or the like.

If the fuse blows, the printed

circuit board may be faulty.

Check whether the fuse on the

Replace the unit.

printed circuit board for the control

has blown.

Note)

See Chapter 4.2 about the location

Reverse connection of 0V

of the fuse.

There is a blown fuse on

and 24V of the

the printed circuit board.

connector(CXA2D) for the

The fuse blow can be confirmed by

external DC24V make the

checking the element of the fuse

fuse blow.

visually or removing the fuse and

[Countermeasure]

checking the connection of the

1.Replace the fuse.

element of the fuse by the tester.

2.Change to the correct

connection.

If the cause is not No.1 - 4, the

The printed circuit board

printed circuit board of servo

Replace the unit.

is defective.

amplifier may be faulty.

α+ series SERVO AMPLIFIER

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Maintenance manual

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1.3.2

Servo amplifier

(1)The LED on servo amplifier is off

When the LED on servo amplifier does not become on after the main circuit breaker is turned on.

No.

Cause of trouble

Check method

Action

The

24V control power

Check the voltage of the 24V power

Check the 24V power supply

supply is not supplied

supply

Checke that the cable connected

Checke the cable connected

the CXA2A/2B is disconnented or

the CXA2A/2B

The cable is defective

short

Check whether 5V power supply

Checke the feedback cable

short-circuits by the feedback cable.

The power supply is

Please check whether the power

Exchange or repair the cable.

short-circuited externally.

cable is short-circuited.

Since Control PCB may be

out of order when this fuse is

blown, please exchange the

Check the fuse on the control PCB

unit.

（Reffer to 4.2 about position of

Note)

fuse）

Reverse connection of 0V

and 24V of the

Blown fuse in the control

The fuse blow can be confirmed by

connector(CXA2A/B) for the

circuit

checking the element of the fuse

communication between

visually or removing the fuse and

amplifiers make the fuse

checking the connection of the

blow.

element of the fuse by the tester.

[Countermeasure]

1.Replace the fuse.

2.Change to the correct

connection.

If it does not correspond to No.1~4,

The PCB of servo

the PCB of servo amplifier may be

Exchange the servo amplifier

amplifier is defective

defective.

α+ series SERVO AMPLIFIER

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(2)

VRDY-OFF alarm is indicated on the CNC screen.

When the VRDY-OFF alarm is indicated on the NC, check the items listed below.

In addition, VRDY-OFF can occur also for reasons other than listed below. If all of the following items turn out to

have not caused VRDY-OFF, check diagnosis information No.358 (V ready-off information) on the diagnosis

screen and report it to FANUC.

(1) Communication between amplifiers

Is the cable for the communication interface (CXA2A/B) between the

amplifiers connected correctly?

(2) Emergency stop signal (ESP)

Has the emergency stop signal (connector: CX4) applied to the common

power supply been released? Alternatively, is the signal connected

correctly?

(3) MCON signal

Hasn’t setting up the axis detach function disabled the transmission of the

ready command signal MCON from the NC to the servo amplifier?

(4) Servo amplifier control board

The servo amplifier control board may be poorly installed or faulty. Be sure to push the face plate as far as it

will go. If the problem persists, replace the control board.

On the Series 30i /31i /32i/16i/18i/21i/0i/PMi, checking diagnosis information (DGN) No.358 makes it

possible to analyze the cause of the VRDY-OFF alarm.

Diagnosis

358

Ｖready-off information

Convert the displayed value to binary form, and check bits 5 to 14 of the resulting binary number.

When the servo amplifier starts working, these bits become 1 sequentially, starting at bit 5. When the servo

amplifier has started normally, all of bits 5 to 14 become 1.

Check bits 5 to 14 sequentially, starting at the lowest-order bit. The first lowest bit that is 0 corresponds to the

processing that caused the V ready-off alarm.

#15

#14

#13

#12

#11

#10

SRDY

DRDY

INTL

RLY

CRDY

MCOFF

MCONA

MCONS

*ESP

HRDY

#06(*ESP)

: Emergency stop signal

#07,#08,#09

: MCON signal (CNC→SV→PS)

#10(CRDY)

: PS preparation completed signal

#11(RLY)

: Relay signal (DB relay energized)

#12(INTL)

: Interlock signal(DB relay de- energized)

#13(DRDY)

: SV preparation completed signal

α+ series SERVO AMPLIFIER

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The following table lists the values of diagnosis information No.358 and the major failure causes. Do not detach or

attach any connector while the power is on.

Values of

Description of failures

Check items

diagnosis

information

No.358

417

Emergency stop has not been

(1) Check that an emergency stop signal applied to

released.

CX4 of the common power supply has been released.

(2) Check that there is no anomaly on the connection

for communication between the amplifiers or the

related cable.

(3) Replace the servo amplifier.

993

No PS ready signal (CRDY) is

(1) Check that there is no problem with the

output.

connection for communication (CXA2A/B) between

the amplifiers or the related cable.

(2) Check that the input power is supplied.

(3) Check that the operation coil of the magnetic

contactor is supplied with power and that there is no

problem with the connection of CX3 of the common

power supply.

(4) Replace the servo amplifier.

4065

No interlock signal is input.

If the dynamic brake module (DBM) is in use, make

checks (1) to (4).

If not, replace the servo amplifier.

(1) Check the connection between the servo amplifier

and DBM.

(2) Check the connection (CX1A/B) between the

common power supply and servo amplifier.

(3) Check that the fuse (FU2) on the common power

supply control board has not blown.

(4) Replace the servo amplifier.

225

－

Replace the servo amplifier.

481

－

Replace the servo amplifier.

2017

－

Replace the servo amplifier.

8161

－

Replace the servo amplifier.

－

Check that the axis detach function has not been set.

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1.3.3

Spindle amplifier

(1) The PIL LED (power-on indicator) is off.

(1)

When the PIL LED on the spindle amplifier module does not become on after the main circuit breaker is

turned on.

No.

Cause of trouble

Check method

Action

The 24V control power is

Check the cable attached to

The PS PIL lamp is off.

not supplied.

CX1D of PS.

Check the cable attached to

The cable is defective.

The PS PIL lamp is on.

the connector CXA2A/B.

The power is externally

When all connectors except

connected to 0 V, GND,

CXA2A/B are detached, the PIL

Replace or repair the cable.

or the like.

lamp is on.

If the fuse blows, the printed

circuit board may be faulty.

Replace the unit.

Even when all cables except the

cable attached to connector CX2A/B

Note)

are detached, the PIL lamp does not

Reverse connection of 0V

come on.

and 24V of the

There is a blown fuse on

connector(CXA2A/B) for the

the printed circuit board.

The fuse blow can be confirmed by

communication between

checking the element of the fuse

amplifiers make the fuse

visually or removing the fuse and

blow.

checking the connection of the

[Countermeasure]

element of the fuse by the tester.

1.Replace the fuse.

2.Change to the correct

connection.

Even when all cables except the

The printed circuit board

cable attached to connector CX2A/B

Replace the unit.

is defective.

are detached, the PIL lamp does not

come on.

(2) The STATUS display is blinking with "--."

(1) When no spindle communication alarm message is indicated on the CNC

Check whether the CNC software option setting or bit setting is correct.

(2) When a communication alarm message is indicated on the CNC

No.

Cause of trouble

Check method

Action

Check the connector housing

The cable is defective.

Repair or replace the cable.

section.

The printed circuit board

Replace the unit.

is defective.

α+ series SERVO AMPLIFIER

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Maintenance manual

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(3) The motor does not turn.

(1) When "--" is indicated on the STATUS display of the SP

Check whether spindle control signals are input. (An example for the first spindle is shown below.)

FS30i

G070

MRDYA

SFRA

SRVA

G071

*ESPA

G029

*SSTP

G030

SOV7

SOV6

SOV5

SOV4

SOV3

SOV2

SOV1

SOV0

(2) When "00" is indicated on the STATUS display of the SP

No spindle speed command is input.

Refer to Chapter 1 in "FANUC AC SPINDLE MOTOR αi series Parameter Manual (B-65280EN)," and

check related parameters.

(3) When an alarm number is indicated on the SP

See the description of the alarm number in Part II.

(4) A specified speed cannot be obtained.

(1) When the speed always differs from a specified speed

Check parameters.

Refer to Chapter 1 in "FANUC AC SPINDLE MOTOR αi series Parameter Manual (B-65280EN)," and

check related parameters.

(2) When an alarm number is indicated on the SP

See the description of the alarm number in Part II.

(5) When cutting is not performed, the spindle vibrates, making noise.

(1) The spindle vibrates only when the spindle speed has reached or is at a particular speed level.

Check whether the spindle also vibrates when the motor is turning by inertia. If noise is unchanged,

investigate the source of mechanical vibration. There are several methods to turn the spindle by inertia as

explained below. Because these methods involve machine sequences, consult with the machine tool builder.

A. Setting spindle control signal MPOF (FS30i-B: G73#2) to 1 immediately causes the spindle to turn by

inertia.

B. Set ALSP (FS30i-B: bit 2 of parameter No. 4009) to 1. Then, when the power to the CNC is turned off

during spindle rotation, the spindle turns by inertia. (On the spindle amplifier, Alarm 24 is indicated.)

(2) When noise is generated at the time the motor is stopped or at any time

A. See Subsection 4.3.4 of this part, and check and adjust the waveform of the spindle sensor.

B. Check that the motor part number matches its parameters. For details, refer to Appendix A in "FANUC AC

SPINDLE MOTOR αi series Parameter Manual (B-65280EN)."

C. Adjust the velocity loop gain and so forth.

For details, refer to Chapter 1 in "FANUC AC SPINDLE MOTOR αi series Parameter Manual

(B-65280EN)."

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(6) An overshoot or hunting occurs.

Refer to Chapter 1 in "FANUC AC SPINDLE MOTOR αi series Parameter Manual (B-65280EN)," and adjust

parameters.

(7) Cutting power weakens or acceleration/deceleration slows down.

(1) When the load meter does not indicate the maximum output

A. A mechanical cause such as a belt slip may occur.

(2) When the load meter indicates the maximum output

A. Check whether the torque limit signal is input incorrectly.

FS30i

G070

TLMHA

TLMLA

B. If you are using the αi BZ sensor, it is likely that a slip has occurred between the sensor gear and spindle (on

acceleration).

C. Check that the motor part number matches its parameters.

For details, refer to Appendix A in "FANUC AC SPINDLE MOTOR αi series Parameter Manual

(B-65280EN)."

D. Check whether the output limit pattern is set incorrectly.

For details, refer to Chapter 1 in "FANUC AC SPINDLE MOTOR αi series Parameter Manual (B-65280EN)."

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(8) Status Error Indication Function

When a parameter is set incorrectly or a sequence is incorrect, the error LED (orange) on the indicator of

the spindle amplifier (SP) is turned on, and an error code is displayed.

Ex. Display of error indicator

Status

Indicator

Error display

error LED and error code

The error is also displayed on the diagnosis screen of the CNC.

Diagnostic number

Content

FS30i

710

State error number

When the spindle amplifier module does not operate for a certain function, check whether the status error is

indicated in the display section of the SP or the diagnosis screen of the CNC.

No.

Description

Action

Although neither *ESP (emergency stop signal)

(there are two types of signals, a PMC signal and

Check the *ESP and MRDY sequences.

PSM contact signal) nor MRDY (machine ready

For MRDY, pay attention to the parameter

signal) has been input, SFR (forward rotation

that specifies whether to use the MRDY

signal), SRV (reverse rotation signal), or ORCM

signal (bit 0 of parameter No. 4001).

(orientation command) is input.

Although parameter settings are such that that there

is no position sensor (position control is not to be

performed, that is, bits 3, 2, 1, and 0 of parameter

Check setting of the parameter.

No. 4002 are, respectively, 0, 0, 0, and 0), a Cs axis

contour control command has been issued.

In this case, the motor is not activated.

Although parameter settings are such that that there

is no position sensor (position control is not to be

performed, that is, bits 3, 2, 1, and 0 of parameter

No. 4002 are, respectively, 0, 0, 0, and 0), a servo

Check setting of the parameter.

mode (such as rigid tapping or Cs axis control)

command or spindle synchronization control

command has been issued.

In this case, the motor is not activated.

Although optional parameter for the orientation

Check setting of the parameter for

function is not set, an ORCM (orientation

orientation.

command) is input.

α+ series SERVO AMPLIFIER

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for 30+-B Start-up and

Maintenance manual

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FANUC AC SERVO MOTOR ai series, AC SPINDLE MOTOR ai series, SERVO AMPLIFIER ai series. MAINTENANCE MANUAL - page 7