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Problems and Countermeasures
Section 8-3
Status and Remedy for Alarm
8-3
Problems and Countermeasures
8-3-1
General Problem Solving
The following
table shows possible problems which may occur and the possi-
ble solution.
Cause
Remedy
A
The MC Unit is not mounted properly. Check that MC Unit mounted cor-
rectly.
B
The MC Unit is not mounted.
Execute Fn014 (option unit detection
result clear) and then cycle the power.
A,B
MC Unit detection error
No.
Problem
Probable causes
Items to check
Remedy
1
None of the MC
Unit’s indicators
are lit when the
power is turned
ON.
Power supply lines are wired
incorrectly.
Check the power supply wiring.
Correct the power supply wir-
ing.
2
The power supply voltage is
low.
Check the power supply volt-
age.
Check the power supply
capacity and correct the
power supply.
3
The power supply is defective.
Check the power supply.
Replace the power supply.
4
None of the
Servo Driver’s
indicators are lit.
Power supply lines are wired
incorrectly.
Check the power supply wiring.
Correct the power supply wir-
ing.
5
The power supply voltage is
low.
Check the power supply volt-
age.
Check the power supply
capacity and correct the
power supply.
6
The power supply is defective.
Check the power supply.
Replace the power supply.
7
Motion Perfect
cannot connect
to the MC Unit.
Serial communications cable is
not connected properly.
Check the cable connection and
wiring.
Correct the cable wiring.
Replace cable if necessary.
8
Motion Perfect serial communi-
cations settings are different
from the MC Unit settings.
Check Motion Perfect settings.
Correct the settings or set the
settings to default and reset
the MC Unit. Default settings
of the Unit is 9600 baud,
7 data bits, even parity and
two stop bits.
9
A program is running which is
printing to the port and interfer-
ing Motion Perfect’s protocol.
Check the MC Unit by using a
VT100 Terminal.
Stop the program (verify if it
is safe to do so) by giving
command HALT or STOP.
10
The MC Unit is defective
---
Replace the MC Unit.
11
Driver cannot be
enabled.
The MC Unit is not operating.
Is the RUN indicator lit?
Check No. 1
12
The MC Unit is indicating a
motion error has occurred.
Check the cause of the problem
with the AXISSTATUS parame-
ter.
13
The communication between
the MC Unit and Servo Driver is
malfunctioning.
Check both the MC Unit and
Servo Driver if they indicate a
communication error.
If there is an error, try to find
the cause and cycle power of
system.
14
A Servo Driver alarm has been
generated.
Check the contents of the Servo
Driver alarm.
If there is an alarm, follow the
instructions.
15
The MC Unit is defective.
---
Replace the MC Unit.