Mitsubishi FX3U-232-BD User Manual page 522

FX Series PLC User's Manual - Data Communication Edition
Non-Protocol Communication (RS/RS2 Instruction)
12.4.7 Time-out check flag [M8409 and M8429]
These devices turn ON when data receiving is suspended, and the next set of receive data is not given within
the time set by the time-out time setting device.
1. Detailed contents
These devices turn ON when data receiving is suspended and the next set of receive data is not given within
the time set by the time-out time setting device. The receiving complete flag also turns ON.
When communication port ch1 is used, M8409 turns ON.
When communication port ch2 is used, M8429 turns ON.
The time-out check flag turns OFF when the PLC waits to receive.
Using this function, the PLC can receive data from equipment where the amount of send data varies without
the terminators.
Receiving
Time-out check flag
M8409
Receiving complete
M8403
12.4.8 Serial communication error code [D8063 and D8438]
When a serial communication error occurs, these devices store the corresponding error codes.
1. Detailed contents
When a serial communication error occurs, these devices store the corresponding error codes shown below.
When communication port ch1 is used, M8063 turns ON.
When communication port ch2 is used, M8438 turns ON.
Error code
ch1 (D8063) ch2 (D8438)
6301
6302
6303
6304
6305
6306
6307
6308
6312
6313
6314
6320
2. Cautions on use
The serial communication error code is not cleared even after communication recovers its normal status.
Clear it by switching the PLC mode from STOP to RUN.
F-84
Receive data is
suspended.
Data
D8409
× 10 ms
3801 Parity error, overrun error or framing error
3802 Incorrect communication character
3803 Communication data sum mismatch
3804 Incorrect data format
3805 Incorrect 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
Set to OFF in sequence program.
ON
ON
Contents of error
12 Related Data
12.4 Details of Related Devices (RS2 Instruction)