Creating Programs - Mitsubishi Electric FX3U-232-BD User Manual

FX Series PLC User's Manual - Data Communication Edition
Parallel Link
7.

Creating Programs

The parallel link has two modes, regular parallel link mode and high speed parallel link mode.
Program settings and the number of device to be used are different in each mode.
When connecting FX PLCs in the parallel link, use the same mode in both PLCs.
7.1 Regular Parallel Link Mode
This section explains the program setting method in the regular parallel link mode.
7.1.1 Checking contents of related devices
The tables below show devices used in the parallel link.
1. Devices for setting the parallel link
These devices are used for setting the parallel link. The setting of these devices is essential to use the
parallel link.
Device
M8070
M8071
M8178
D8070
2. Devices for judging errors in the parallel link
These devices are used for judging errors in the parallel link. Use them to output link errors to the outside and
interlock sequence programs.
Device
M8072
M8073
M8063
C-38
Name
Parallel link master station
declare
Parallel link slave station
setting
Channel setting
Error judgement time (ms)
Name
Parallel link ON
Master/slave station setting
error
Link error
Set this device to ON when linking a PLC as the master station.
Set this device to ON when linking a PLC as the slave station.
Set the channel of communication port to be used (in the FX
FX , FX and FX ).
3GC 3U 3UC
When this device is OFF: ch1
When this device is ON: ch2
Set the time for judging error in the parallel link data communication.
[Initial value: 500]
This device remains ON while the parallel link is executed.
This device turns ON when there is an error in the setting of the
master station or slave station.
This device turns ON when a communication error occurs.
7 Creating Programs
7.1 Regular Parallel Link Mode
Description
Description
,
3G