Mitsubishi FX3U-232-BD User Manual page 200

FX Series PLC User's Manual - Data Communication Edition
Parallel Link
10.2.5 Parallel link ON [M8072]
This device is provided to verify that the parallel link is being executed.
1. Applicable stations
The master and slave station may check parallel link status.
2. Detailed contents
M8072 remains ON while the parallel link is being executed normally, and remains OFF while the parallel link
is not being executed normally.
10.2.6 Parallel link setting error [M8073]
This device is provided to verify that the setting is correct in the master station and slave station in the parallel
link.
1. Applicable stations
The master and slave station may check parallel link status.
2. Detailed contents
M8073 remains OFF when the setting is correct in the master station or slave station, and turns ON when the
setting is incorrect.
10.2.7 Serial communication error [M8063 and M8438]
These devices are provided to check communication errors. (M8438 is available only in the FX
1. Applicable stations
The master and slave station may check parallel link status.
2. Detailed contents
M8063 turns ON when an error occurs using parallel link on ch 1. When M8063 turns ON, the error code is
stored in D8063.
M8438 turns ON when an error occurs using parallel link on ch 2. When M8438 turns ON, the error code is
stored in D8438.
3. Cautions on use
These devices do not turn OFF even after the communication error is reset. They turn OFF when the PLC
mode is changed from STOP to RUN.
10.2.8 Error judgement time setting [D8070]
This device is provided to set the error judgment time (initial value: 500 ms).
1. Applicable stations
The master and slave station may check parallel link status.
2. Detailed contents
When data transmission requires more time than the time set here, it is regarded as error.
C-50
10 Related Data
10.2 Details of Related Devices
and FX
3U 3UC
.)