Mitsubishi Electric FX5 User Manual page 162

The time-out 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
Data
Timeout
Receiving completed
The time-out check is judged in END processing based on a 1 ms free counter set when the data receiving starts and the
time-out flag is turned ON. A lag of maximum 1 scan time occurs due to processing in the END processing.
Precautions
Do not turn ON or OFF with program or engineering tool.
Serial communication error code
When a serial communication error occurs, these devices store the corresponding error codes (Page 155).
FX5 dedicated
CH1 CH2
SD8500 SD8510
R: Read only
Precautions
Do not change the value with program or engineering tool.
Serial communication error code is not cleared even after communication is restored to normal state.
They are cleared by turning the PLC power OFFON, RUNSTOP, resetting the system or by SM50 (Error Detection Reset
Completion) is turned ON.
Serial communication settings
The communication parameters set in the communication settings are stored when the power is turned OFFON or the
system is reset. (Page 136 Communication Settings)
FX5 dedicated
CH1 CH2
SD8502 SD8512
R: Read only
The descriptions of the communication parameters are as follows.
Bit No.
b0
b1
b2
b3
5 NON-PROTOCOL COMMUNICATION
160
5.9 Related Devices
Receive data is suspended.
Time-out time
FX3 Series
compatible
CH3 CH4 CH1
SD8520 SD8530 SD8063
CH3
SD8522
Name
Data length
Parity bit
Stop bit
Set to OFF in program.
ON
ON
Description
CH2
SD8438 When a serial communication error occurs, the error
code is stored.
Description
CH4
SD8532 Stores the setting of the communication parameter.
Description
0 (bit = OFF)
7 bits
b2, b1
(0, 0): Not provided
(0, 1): Odd
(1, 1): Even
1 bit
R/W
R
R/W
R
1 (bit = ON)
8 bits
2 bits