F-84
FX Series PLC User's Manual - Data Communication Edition
Non-Protocol Communication (RS/RS2 Instruction)
12 Related Data
12.4 Details of Related Devices (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.
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.
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.
Error code
Contents of error
ch1 (D8063) ch2 (D8438)
6301 3801 Parity error, overrun error or framing error
6302 3802 Incorrect communication character
6303 3803 Communication data sum mismatch
6304 3804 Incorrect data format
6305 3805 Incorrect command
6306 3806 Monitoring timeout
6307 3807 Modem initialization error
6308 3808 N:N Network parameter error
6312 3812 Parallel link parameter error
6313 3813 Parallel link sum error
6314 3814 Parallel link format error
6320 3820 Error in communication with inverter
Receive data is
suspended.
Set to OFF in sequence program.
Receiving
Data
ON
Time-out check flag
M8409
ON
Receiving complete
M8403
D8409
×
10 ms
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