Mitsubishi Electric MELSERVO MR-J2 C Series, Instruction Manual

Page: 209 / 265

11 - 8
11. TROUBLESHOOTING
Display Name Definition Cause Action
A.61 Operation alarm "1" is set in auxiliary
function of point
table No.15.
Setting error of auxiliary function of point
table No.15 Set "0" in auxiliary function of
point table No.15.
1. Communication connector
disconnected.
Connect correctly.
2. Communication cable fault Repair or change the cable.
A.8A Serial
communication
time-out Valid command has
not been transmitted
from communication
device (e.g. personal
computer) to servo
amplifier within
time-out period.
3. Valid command has not been
transmitted from communication
device (e.g. personal computer) within
time-out period.
Transmit valid command from
communication device
(e.g. personal computer) within
time-out period.
1. Communication cable fault
(Open cable or short circuit)
Repair or change the cable. A.8E Serial
communication
error
Serial
communication error
occurred between
servo amplifier and
communication
device (e.g. personal
computer).
2. Communication device (e.g. personal
computer) faulty
Change the communication
device (e.g. personal computer).
8888 Watchdog CPU, parts faulty Fault of parts in servo amplifier
Checking method
Alarm (8888) occurs if power is
switched on after disconnection
of all cables but the control
circuit power supply cables.
Change servo amplifier.
11.2.3 Remedies for warnings
CAUTION
If an absolute position counter warning (A.E3) occurred, always make home
position setting again. Otherwise, misoperation may occur.
POINT
When any of the following alarms has occurred, do not resume operation by
switching power of the servo amplifier OFF/ON repeatedly. The servo
amplifier and servo motor may become faulty. If the power of the servo
amplifier is switched OFF/ON during the alarms, allow more than 30
minutes for cooling before resuming operation.
Excessive regenerative warning (A.E0)
Overload warning 1 (A.E1)
If servo forced stop warning (A.E6) occurs, the servo off status is established. If any other warning occurs,
operation can be continued but an alarm may take place or proper operation may not be performed. Use
the optional Servo Configuration software to refer to the cause of warning.
Display Name Definition Cause Action
In incremental system:
1. Positioning operation
was performed without
home position return.
2. Home position return
ended abnormally.
1. Positioning operation was performed
without home position return.
2. Home position return speed could
not be decreased to creep speed.
3. Limit switch was actuated during
home position return starting at
other than position beyond dog.
1. Perform home position return.
2. Review home position return
speed/creep speed/moving
distance after proximity dog.
A.90 Home position
return incomplete
In absolute position
detection system:
1. Positioning operation
was performed without
home position setting.
2. Home position setting
ended abnormally.
1. Positioning operation was performed
without home position setting.
2. Home position setting speed could
not be decreased to creep speed.
3. Limit switch was actuated during
home position setting starting at
other than position beyond dog.
1. Perform home position setting.
2. Review home position setting
speed/creep speed/moving
distance after proximity dog.
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