Mitsubishi FX3U-232-BD User Manual page 512

FX Series PLC User's Manual - Data Communication Edition
Non-Protocol Communication (RS/RS2 Instruction)
11.5 Checking the Absence/Presence of Errors
1. Checking for communication errors
When a communication error occurs, the serial communication error flag turns ON.
In all PLCs except FX
PLCs, M8063 turns ON.
When communication port ch2 is used in FX
When the serial communication error flag turns ON, D8063 or D8438 stores the corresponding error code.
2. Checking the error code
When the serial communication error flag turns ON, a corresponding error code shown below is stored in
D8063 or D8438.
Error code
ch1 (D8063) ch2 (D8438)
6301
6302
6303
6304
6305
6306
6307
6308
6312
6313
6314
6320
When an error code above is stored, check the following items:
• Wiring
• Parameter settings
F-74
and FX PLCs and when communication port ch1 is used in FX
3U 3UC
3801 Parity error, overrun error or framing error
3802 Defective communication character
3803 Communication data sum mismatch
3804 Defective data format
3805 Defective command
3806 Monitoring timeout
3807 Modem initialization error
3808 N:N Network parameter error
3812 Parallel link parameter error
3813 Parallel link sum error
3814 Parallel link format error
3820 Error in communication with inverter
and FX PLCs, M8438 turns ON.
3U 3UC
Contents of error
11 Troubleshooting
11.5 Checking the Absence/Presence of Errors
and FX
3U 3UC