Start-Up Problems; Configuration Problems - Omron CQM1-ARM21 Operation Manual

Troubleshooting

6-2-2 Start-up Problems

Symptom
No LEDs are ON or The PLC's power is OFF.
flashing
The CQM1-ARM21 is defective.
RUN LED is The CQM1-ARM21 is initialising after power-on
flashing or due to a change to Protected Mode.
and
There are no AS-Interface slaves on the line.
The master will continue scanning for slaves in
Normal_Operation
the initialisation phase.
Flag is OFF
The CQM1-ARM21 cannot complete its power-
on self-check sequence. Unit is defective.
RUN LED is Insufficient power on the AS-Interface line to
flashing start communications.
and
APF LED is ON,
System Error Flag
(IR n.01) is ON.

6-2-3 Configuration Problems

Symptom
CER LED ON The detected configuration on the AS-Interface
bus differs from the stored permanent
Configuration_OK
configuration, or a slave with address 0 is
Flag OFF
detected.
Store Configuration Storing the detected configuration is not
(SET switch allowed in Protected Mode
OFF→ON) does not
extinguish CER
LED.
ERR LED ON A change to Protected Mode, requested by
toggling the MOD switch OFF→ON, is not
allowed because:
- A slave with address 0 was detected in
Configuration Mode.
- The unit is in Setup Mode (Mode Bit is ON).
If the CQM1-ARM21 does not appear to enter its normal mode of operation,
check for the following symptoms.
Possible cause
When encountering problems during the configuration of an AS-Interface
network, check the table below.
Possible cause
Possible remedy
Apply power to the PLC's power supply unit
according to its specifications.
Replace the CQM1-ARM21.
Normal behaviour, the flashing should stop
within several seconds.
Install AS-Interface slaves.
Replace the CQM1-ARM21
Check that the voltage on the AS-Interface
line, at the master's terminals, is between
23.5 and 31.5 V DC. Inspect the AS-Interface
power supply and replace if necessary.
Note: the Unit does not check for overvoltage,
nor can it distinguish AS-Interface power
supplies from standard types.
Possible remedy
If the actual configuration is believed to be
correct, store the detected configuration by
toggling the SET switch OFF→ON.
If the permanent configuration is believed to
be correct, determine the permanent
configuration data by using the
Get_Permanent_Configuration command, and
build the actual configuration accordingly.
Put the SET switch in OFF position, then set
the MOD switch OFF (Configuration Mode).
Store the configuration by toggling the SET
switch ON, then return to Protected Mode by
setting the MOD switch ON.
Note: This will restart the master.
Set the MOD switch back to OFF, then:
- Remove the slave with address 0
- Turn the Mode Bit (IR m.01) OFF.
and set the Unit to Protected Mode by
toggling the MOD switch OFF→ON.
Section 6-2
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