Fanuc Beta Servo Drive Alarm List

Fanuc Servo Amplifier Unit B Series UK

 

 

fanuc spare parts
 

 

Program or setting alarms (PS Alarms)

PMM Screen Alarm Code Fault Remedy
Not ready Drive is good
No LED LIT
The control circuit is not operating normally
Check the 24–VDC control supply voltage.
If the voltage is low, increase the voltage to
an appropriate level.
Check whether a fuse in the servo amplifier
unit has blown. If a blown fuse is found,
replace it, following the procedure described
in Part 4 “Maintenance of Servo Amplifier
Unit.”
Replace the servo amplifier.The control circuit is not operating normally.
0 Drive ready Drive is good
0 (Blinking) Command been executed Fanuc Amplifier is good
P (Blinking) Parameters have been loaded Drive is good
000 U A Parameter that requires power-down has been specified Turn the power off then back on
011 F The specified feedrate is zero Check the feedrate parameter specified with a function code
013 F The specified feed rate (maximum feed rate) is zero Check the vale of parameter No.043 which indicates the maximum feed rate that can be specified
070 |- More than 32 blocks have been registered for a buffering operation Reduce the number of registered blocks to 32
085 h Input from the reader/punch interface caused an overrun, parity or framing error Correct the baud rate of the input/output unit (always 4800) or other settings
086 h Input from the reader/punch interface or the like includes an input/output unit operation ready signal (DR) that is set to off Turn the reader/punch on. Check the cable connection
087 h After input from the reader/punch stops, character input does not stop even though ten characters have been input  Check cable connection
090 9 Reference position setting cannot be executed normally Move the tool in the direction of reference position return in jog mode at a speed that causes the servo position to exceed 128, Then specify another reference position setting
093 u A first to third reference position return cannot be executed because the reference  position has not yet been established Set the reference position
224 u The reference position has not yet been established. This occurs only when the ZRTN bit of  parameter No.001 is set to 0 Set the reference position
250 7 Input data 1 is invalid Check input data 1, Specified with a function code
251 7 Input data 2 is invalid Check input data 2, Specified with a function code
251 7 A function code or mode is invalid Check the command code
255 n Operation cannot be activated because an invalid mode is specified or because block execution is in progress Check the mode, Check whether a block is been executed
 290  _ The interface switch signal (DRC) was switched during block execution Switch the signal after block execution stops
 291  4  Speed of a axes movement specified by a external pulse has exceeded the upper limit. This occurs when the EPEXA bit of parameter No001 is set to 1 Check the speed specified by the external pulse. Check the magnification of the external pulse (parameters No.062 and 063).
 292  7  A checksum error for the battery-powered memory was detected Parameters are cleared. Set the parameters again. If this alarm subsequently recurs replace the unit

Fanuc Spares and repairs

Pulse Coder Alarms

PMM Screen Alarm Code Fault Remedy
300 5 A communication error (DTER) for the serial pulse coder was detected Check the cable. Pulsecoder defective, Turn the power off if the alarm recurs when the power is reapplied replace the pulse coder.
301 5 A communication error (CRCER) for the serial pulse coder was detected Check the continuity of the signal cable. If the
cable is normal, the pulse coder or servo amplifier
unit may be defective. This error can also be
caused by external noise.
302 5  A communication error (STBER) for the serial pulse coder was detected Check the continuity of the signal cable. If the cable is normal, the pulse coder or servo amplifier unit may be defective. This error can also be caused by external noise.
303 6 An LED disconnection (LDAL) was detected in the serial pulse coder Turn the power off. If this alarm recurs when the
power is reapplied, replace the motor.
304 6 A mispulse alarm (PMAL) for the serial pulse coder was detected Turn the power off. If this alarm recurs when the
power is reapplied, replace the motor.
305 6 A miscount alarm (CMAL) fir the serial pulse coder was detected Turn the power off. If the alarm recurs when the
power is re–applied, replace the motor.
If the alarm does not recur, restart the operation
from reference position return.
306 3 The motor has overheated (OHAL) This alarm is issued when the motor has overheated,
causing the thermostat to trip.
Possible causes include an excessively high
ambient temperature and excessively strict
operating conditions. Check the actual cause.
If it occurs again when the motor is cooled, the
motor or servo amplifier may have failed. Replace
the faulty motor or servo amplifier.
308 6 A soft phase alarm (SPHAL) was detected Turn the power off. This alarm may be caused
by noise.
319 11 When the absolute pulse coder is used, the motor has not yet rotated through more than one turn after the first power up Cause the motor to rotate through more than
one turn in jog feed mode, then turn the power
off then back on.
350 2 The battery voltage of the absolute pulse coder is low  Replace the battery.
Restart the operation from reference position
return
351 1 The battery voltage of the absolute pulse coder is low (warning) Replace the battery.
401 , A communication error was detected in the serial
pulse coder.
Check the continuity of the pulse coder signal
cable. If the cable is normal, the pulse coder or
servo amplifier unit may be defective. This error
can also be caused by external noise.

Servo Alarms

PMM Screen Alarm Code Fault Remedy
400 4 The servo motor has overheated The motor operation condition may be too severe.
Check the operation condition
403 o The cooling fins have overheated The load on the motor may be too high. Re–examine the load conditions.
404 J The regenerative discharge unit has overheated This alarm is issued when the average regenerative
discharge energy is too high (when the
acceleration/deceleration frequency is too high,
for example)
405 n Reference position return could not be
executed correctly.
Re–execute reference position return. 405 If a value in the range of 4 to 96 is set for parameter No. 032 (CMR), an alarm may be issued. In this case, prevent an alarm from being issued by setting N405 (bit 4 of parameter No. 001) to “1”
410 r The servo position error in the stop state is larger than the value specified in parameter No.110 Determine the mechanical cause of the large
position error. If no mechanical cause is found,
specify a larger value for the parameter
411 r The servo position error during movement is
larger than the value specified in parameter
No.182.
Determine the mechanical cause of the large
position error. If no mechanical cause is found,
apply any of the following countermeasures:
Specify a larger value for the parameter.
Specify a lower feedrate.
Increase the time constants.
412 c An overcurrent alarm or IPM alarm is issued An overcurrent alarm or IPM alarm is issued.
413 y A DC link overvoltage alarm is issued This alarm is issued when the DC voltage of the main circuit power is too high.
414 P A DC link low voltage alarm is issued. This alarm is issued when the DC voltage of the main circuit power is too low.
417 A A parameter has been specified incorrectly. Check the following parameters: No.30: Is the specified motor type correct? No.31: Is the specified direction of rotation of the motor correct? No.106: Is the denominator of the number of pulses per single revolution of the motor 0? No.180: Is the specified reference counter capacity 0 or a negative value?
423 t The specified speed exceeds 32767000 detection
units per second.
 Re–examine the CMR and speed settings.
425 C The cooling fan has stopped This alarm is issued when the fan motor built into the servo amplifier unit has failed.
446 R The external pulse input line is disconnected Connect the external pulse input signal correctly
447 r The velocity deviation is too high (velocity control) Check the actual velocity.

Overtravel Alarms

PMM Screen Alarm Code Fault Remedy
500 H The positive stroke limit has been exceeded. Check whether *+OT and *–OT are connected correctly. Check whether a correct move command is specified. Move the tool in the opposite direction in jog mode, then perform a reset.
501 H The negative stroke limit has been exceeded. Check whether *+OT and *–OT are connected correctly. Check whether a correct move command is specified. Move the tool in the opposite direction in jog mode, then perform a reset.
510 H The positive soft stroke limit has been exceeded. Check whether appropriate values have been specified for parameters No.142 and 143. Check whether a valid move command is specified. Move the tool in the opposite direction in jog mode, then perform a reset.
511 H The negative soft stroke limit has been exceeded. Check whether appropriate values have been specified for parameters No.142 and 143. Check whether a valid move command is specified. Move the tool in the opposite direction in jog mode, then perform a reset.

System Alarms

PMM Screen Alarm Code Fault Remedy
 E A error was detected in the RAM write/read test at power up Replace Fanuc servo amp
 8 A error was detected in the data collation check the battery powered memory Turn the power off and back on. If alarm recurs replace servo amp
 9  A data transfer alarm for the battery powered memory has been issued Replace the servo amp
 d A Watchdog alarm was issue Turn the power off and back on. If alarm recurs replace servo amp
 b A checksum alarm for the control software Rom is issued  Replace the servo amp
 . A error was detected in the control circuit  Replace the servo amp
 L A I/O link error occured  Check all devices are on
Specification part number Model number Interface type Application
 A06B-6093-H101  SVU-12  PWM For a feed axis that requires high precision
 A06B-6093-H102  SVU-20  PWM For a feed axis that requires high precision
 A06B-6093-H103  SVU-40  PWM For a feed axis that requires high precision
 A06B-6093-H104  SVU-80  PWM For a feed axis that requires high precision
 A06B-6093-H111  SVU-12  FSSB For a feed axis that requires high precision
 A06B-6093-H112  SVU-20  FSSB For a feed axis that requires high precision
 A06B-6093-H113  SVU-40  FSSB For a feed axis that requires high precision
 A06B-6093-H114  SVU-80  FSSB For a feed axis that requires high precision
 A06B-6093-H119  SVU-4  FSSB For a feed axis that requires high precision
 A06B-6093-H151  SVU-12  I/O LINK For a feed axis that does not require high precision
 A06B-6093-H152  SVU-20  I/O LINK For a feed axis that does not require high precision
 A06B-6093-H153  SVU-40  I/O LINK For a feed axis that does not require high precision
 A06B-6093-H154  SVU-80  I/O LINK For a feed axis that does not require high precision
 A06B-6093-H159  SVU-4  I/O LINK For a feed axis that does not require high precision





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