452
27 TROUBLESHOOTING
27.1 Checking Module Status
5. Completing self-loopback test
• When the result is normal
Start data communication with the target device.
Configure the parameter settings with Engineering tool. (Page 422 PARAMETER SETTING)
Turn OFF the power for the station with C24, and connect the cable to communicate with the target device.
Turn ON the power for the station with C24.
• When the result is abnormal
Check an error description on the "Intelligent Function Module Monitor" screen of Engineering tool.
Check the error descriptions on the screens by bit-decoding the monitored value (16-bit integer). Each bit corresponds to the
following error description.
Buffer memory to be monitored Description when corresponding bit
is ON
Corrective action
Bit position Address
CH1 side: Un\G513 CH2 side: Un\G514
b0 to b3
b4 C/N Error occurred on the CPU module. Remove the cause of error
in the CPU module.
The power supply capacity is insufficient. Review the power supply
capacity.
Module is not mounted correctly. Mount the module properly.
Error on the base unit, extension cable, CPU
module, or C24 occurred.
Check for each module and
remove the cause of the
error.
Reconnect the cable
correctly.
Mount the module properly.
b5 to b13
b14 CH2 ERR CH2 side communication error Reconnect the cable
correctly.
Review the test wiring
connection.
b15 CH1 ERR CH1 side communication error
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