IAI Msep, Instruction Manual, Page: 231 / 296

Chapter 6
Troubleshooting
223
Alarm
Code
Alarm Name Cause/Treatment
81 Parameter Check Sum
Error
Cause : There is a possibility that the memory data inside MSEP
has destroyed.
Treatment : Establish all the settings again on Gateway Parameter
Setting Tool or write the backup data if it exists.
90 Driver Board Mount Error Cause : The number of axes (number of driver boards) set in
Gateway Parameter Setting Tool does not match with the
number of the actually connected axes.
Treatment : Match the numbers of the axes.
9C Fieldbus Module Not
Detected
Cause : Communication board for Fieldbus was not detected.
1) Communication board is not inserted.
2) Malfunction of communication board
Treatment : Turn the power OFF and reboot. If the same error occurs
again, please contact IAI.
9E Fan Error Cause : A Fan error was detected.
Treatment : It is considered that it is the end of the product life of the fan
(approximately 3 years). Replace the fan.
A0 Control Power
Overvoltage
Cause : Control power voltage reached beyond the overvoltage
threshold (120% of 24V DC = 28.8V).
1) The voltage of 24V DC power supply is high.
2) A faulty part inside the controller
3) Turning the servo ON at acceleration/deceleration
spends a huge current consumption transiently. Using
the remote sensing function with a power supply with no
enough current capacity may cause overvoltage
responding to the current change.
Treatment : 1) 2) Check the voltage of the input power supply.
3) Think to use a power supply with enough current
capacity or not to use the remote sensing function.
If the voltage is normal, please contact IAI.
A1 Control Power Voltage
Drop
Cause : The control power voltage dropped less than the voltage
drop threshold (70% of 24V DC = 16.8V).
1) The voltage of 24V DC power is low
2) A faulty part inside the controller
Treatment : Check the power voltage.
If the voltage is normal, please contact IAI.
A2 Motor Power Voltage Error Cause : 1) Motor power input voltage (input to MPI terminal) is too
large (38V or more)
Turning the servo ON at acceleration/deceleration
spends a huge current consumption transiently. Using
the remote sensing function with a power supply with no
enough current capacity may cause overvoltage
responding to the current change.
2) Overcurrent is generated on the motor power supply line
Treatment : 1) Check the power voltage input to MPI terminal. Think to
use a power supply with enough current capacity or not
to use the remote sensing function.
2) Check the wire layout between the actuator and
controller.
A6 Encoder Voltage Drop Cause : The power voltage for the encoder has dropped below the
allowable range.
Treatment : Check the connection between the actuator and MSEP.
AA Regenerative Electric
Discharge Circuit Error
Cause : There is an error in the regenerative discharge circuit inside
the controller.
Treatment : Turn the power OFF and reboot. If the same error occurs
again, please contact IAI.
AB Assumed Regenerative
Discharge Excessive
Power
Cause : The regenerative electric power exceeded what can be
dealt with the regenerative resistor.
Treatment : Decrease the acceleration/deceleration speed, revise the
operation interval or connect an external optional
regenerative resistor (RER-1).