C-43
FX Series PLC User's Manual - Data Communication Edition
Parallel Link
7 Creating Programs
7.3 Cautions on Program Creation
A
Common Items
B
N:N Network
C
Parallel Link
D
Computer Link
E
Inverter
Communication
F
Non-Protocol
Communication
(RS/RS2 Instruction)
G
Non-Protocol
Communication
(FX
2N
-232IF)
H
Programming
Communication
I
Remote
Maintenance
Apx.
Discontinued
models
7.3 Cautions on Program Creation
1. Program for reading link devices
1) Do not change the contents of link devices for the other station.
2) When a link error occurs, the link device information remains the same as the status just before the error.
Create a fail-safe program which does not cause abnormality even if a link error occurs.
2. Cautions on using FX3U/FX3UC PLCs
1) Only ch1 or ch2 can be set in the parallel link.
2) Do not use the N:N Network and the parallel link at the same time.
(For example, it is not allowed to use ch1 for the N:N Network and simultaneously use ch2 for the parallel
link.)
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