Omron CQM1-ARM21, Руководство по эксплуатации

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Troubleshooting
Section 6-2
55
6-2-2 Start-up Problems
If the CQM1-ARM21 does not appear to enter its normal mode of operation,
check for the following symptoms.
Symptom Possible cause Possible remedy
The PLC’s power is OFF. Apply power to the PLC’s power supply unit
according to its specifications. No LEDs are ON or
flashing
The CQM1-ARM21 is defective. Replace the CQM1-ARM21.
The CQM1-ARM21 is initialising after power-on
or due to a change to Protected Mode. Normal behaviour, the flashing should stop
within several seconds.
There are no AS-Interface slaves on the line.
The master will continue scanning for slaves in
the initialisation phase. Install AS-Interface slaves.
RUN LED is
flashing
and
Normal_Operation
Flag is OFF
The CQM1-ARM21 cannot complete its power-
on self-check sequence. Unit is defective. Replace the CQM1-ARM21
RUN LED is
flashing
and
APF LED is ON,
System Error Flag
(IR n.01) is ON.
Insufficient power on the AS-Interface line to
start communications. 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.
6-2-3 Configuration Problems
When encountering problems during the configuration of an AS-Interface
network, check the table below.
Symptom Possible cause Possible remedy
CER LED ON
Configuration_OK
Flag OFF
The detected configuration on the AS-Interface
bus differs from the stored permanent
configuration, or a slave with address 0 is
detected. 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.
Store Configuration
(SET switch
OFF
→
ON) does not
extinguish CER
LED.
Storing the detected configuration is not
allowed in Protected Mode 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.
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).
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.