H-33
FX Series PLC User's Manual - Data Communication Edition
Programming Communication
5 Communication Setting (Initialization) in FX Programmable Controller
5.1 Check Procedure
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
5. Communication Setting (Initialization) in FX
Programmable Controller
This chapter explains the communication setting method for executing programming communication using
optional communication equipment operating in accordance with RS-422, RS-232C or USB.
The setting described here is not required when the standard built-in port is used.
When using this communication function in ch1 in an FX
3G, FX3U or FX3UC PLC, check D8120 and D8400
using the following procedure.
When using this communication function in ch2 in an FX
3G, FX3U or FX3UC PLC, check D8420 using the
following procedure.
5.1 Check Procedure
1 Monitoring D8120 (D8400, D8420)
Turn ON the PLC power while it is in STOP mode, and monitor D8120 (D8400, D8420).
1. When the value of D8120 (D8400, D8420) is "0"
The communication setting is not provided.
2. When the value of D8120 (D8400, D8420) is any value other than "0"
The communication setting is provided.
2 Checking absence/presence of the parameter setting
Check absence/presence using GX Developer or FXGP/WIN.
1) GX Developer operating procedure (For details, refer to Section 5.2.)
2) FXGP/WIN operating procedure (For details, refer to Section 5.3.)
3 Checking absence/presence of sequence program setting
Check whether or not a write instruction is programmed for D8120 (D8400, D8420).
1. When such an instruction is programmed
Program example: (for D8120)
Change the program as shown below, and then change the PLC mode from STOP to RUN.
2. When such an instruction is not programmed
Proceed to the next step.
4 Monitor D8120 (D8400, D8420) again, and confirming that its value is "0"
FNC 12
MOV
H0000 D8120
M8002
Initial pulse
M8002
Initial pulse
FNC 12
MOV
H23F6 D8120 Program example
Changed program
The value varies depending on
the communication setting.
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