27 TROUBLESHOOTING
27.3 Troubleshooting by Symptom
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• Remarks
The error code when ERR LED turns ON is stored in the buffer memory shown below.
C ERR LED turns ON
• Remarks
The error code when C ERR LED turns ON is stored in the buffer memory shown below.
Error factor Error code storage buffer memory
Address Name
CH1 CH2
Modern function error Un\G545 Modern function error
Monitoring device error Un\G8709 Un\G8965 Programmable controller CPU
monitoring function execution result
Predefined protocol function error Un\G16450 Un\G16466 Predefined protocol function error
code
Symptom Cause Corrective action MC Non Bi Pd
C ERR LED turns ON. An error occurred during the
on-demand execution.
• Read the error code from the buffer memory, and check the
error contents and correct the designation contents.
C24 detected an error while
transmitting data.
• Read the error code from the buffer memory, and take the
corrective action corresponding to the error contents.
C24 detected an error while
receiving data.
• Read the error code from the buffer memory, and take the
corrective action corresponding to the error contents.
Error factor Error code storage buffer memory
Address Name
CH1 CH2
On-demand execution error Un\G598 Un\G614 On-demand execution results
Data transmission error Un\G599 Un\G615 Data transmission result
Data reception error Un\G600 Un\G616 Data reception result
Modern function error Un\G545 Modern function error code
MC protocol send error Un\G602 Un\G618 MC protocol send error code
Monitoring device error Un\G8709 Un\G8965 Programmable controller CPU
monitoring function execution result
Predefined protocol function error Un\G16450 Un\G16466 Predefined protocol function error
code
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