Parallel Link On [M8072] - Mitsubishi Electric FX3U-232-BD User Manual

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
FX and FX
3U 3UC
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
Do not set these devices to ON using a program or programming tool.
Serial communication errors are not cleared even when communication is restored.
Serial communication errors are cleared in FX
turned off and on.
Serial communication errors are cleared in other PLCs when the mode is switched 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.
3. Cautions on use
Set the error judgment time for the master station to a value twice or more the scan time in the slave station.
If the error judgment time is less than twice the scan time, a serial communication error may occur.
C-54
.)
, FX , FX , FX and FX
3S 3G 3GC 3U
10 Related Data
10.2 Details of Related Devices
, FX
3G
PLCs when the power is
3UC
,
3GC