As-Interface Communication Problems - Omron CQM1-ARM21 Operation Manual

Troubleshooting

6-2-4 AS-Interface Communication Problems

Symptom
Slave status LED is Slave is not included in the permanent
OFF while the slave configuration, and Unit is in Protected Mode.
is connected
Slave address is above the limit set by the CH
switches.
Slave status LED is Slave is included in the permanent
flashing configuration, but not active in data exchange.
Slave 0 LED flashing indicates that a slave with
address 0 is detected.
ERR LED ON Data transmission on the AS-Interface line is
corrupted.
Change of operation mode is not allowed.
The CQM1-ARM21 is defective.
APF LED ON The AS-Interface power supply is not
connected or defective.
The current consumed by the AS-Interface
master and slaves exceeds the rating of the
power supply.
System Error Flag ERR LED or APF LED is lit.
ON
After successfully configuring the AS-Interface network, the following
symptoms may indicate errors in the proper operation.
Possible cause Possible remedy
Add the slave to the permanent configuration
in Configuration Mode (SET switch), or in
Setup Mode (Set_Permanent_Configuration
command), then resume Protected Mode.
Use only slave addresses within the range
selected by the CH switches (see 2-1-3,
Switches
).
Check the data exchange with the slave via
the allocated IR bits. If necessary, replace the
slave.
Assign a valid address, or remove the slave
with address 0.
Check the installation of the AS-Interface
cable for physical damage, excessive length,
routing near sources of strong interference
See Configuration Problems
Replace the Unit.
Check the power supply and its connections.
Replace if necessary.
Replace the AS-Interface power supply by a
type with higher capacity, or install repeaters
and a power supply for each section.
See above.
Section 6-2
57