Communication Setting (Initialization) In Fx Programmable Controller; Check Procedure; Monitoring D8120; Checking Absence/Presence Of Parameter Setting - Mitsubishi FX3U-232-BD User Manual

FX Series PLC User's Manual - Data Communication Edition
N:N Network
5. Communication Setting (Initialization) in FX
Programmable Controller
The communication setting is not required in FX PLCs for the N:N network.
Using the following procedure, verify that the communication setting is not specified for another
communication type and verify that the setting is correct.
When using the N:N Network in ch2 in an FX
5.1

Check Procedure

1

Monitoring D8120

Turn ON the power to the PLC while it is in STOP mode, and monitor D8120.
1. When the value of D8120 is "0"
The communication setting is not provided.
2. When the value of D8120 is any value other than "0"
The communication setting is provided.
2

Checking absence/presence of parameter setting

Check for the absence/presence using the 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.
1. When such an instruction is programmed
Program example:
Change the program as shown below, and then change the PLC mode from STOP to RUN.
M8002
Initial pulse
M8002
Initial pulse
2. When such an instruction is not programmed
Proceed to the next step.
4
Monitoring D8120 again, and confirming that its value is "0"
or FX
3U
FNC 12
H23F6 D8120
MOV
The value varies depending on
the communication setting.
FNC 12
H0000 D8120
MOV

5 Communication Setting (Initialization) in FX Programmable Controller

PLC, check D8420 using the following procedure.
3UC
Program example
Changed program
5.1 Check Procedure
A
B
C
D
E
F
G
H
I
Apx.
B-21