Communication Setting (Initialization) In Fx Programmable Controller - Mitsubishi Electric FX3U-232-BD User Manual

FX Series PLC User's Manual - Data Communication Edition
Parallel Link
5. Communication Setting (Initialization) in FX
Programmable Controller
The communication setting is not required in FX PLCs for parallel link.
If the communication setting is already provided for another communication type or for checking the existing
communication setting, perform the following procedure.
When using this communication function in ch1 in an FX
and D8400 using the following procedure.
When using this communication function in ch2 in an FX
the following procedure.
In other PLCs, use D8120 for verification.
5.1 Check Procedure
1
Monitoring D8120 (D8400, D8420)
Turn ON the power to the PLC 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 parameter setting
Check absence/presence using the GX Works2, GX Developer, FXGP/WIN or FX-30P.
1) GX Works2 operating procedure (For details, refer to Section 5.2.)
2) FXGP/WIN operating procedure (For details, refer to Section 5.3.)
For details on GX Developer operating procedure, refer to GX Developer Operating Manual.
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.
M8002
Initial pulse
M8002
Initial pulse
2. When such an instruction is not programmed
Proceed to the next step.
4
Monitoring D8120 (D8400, D8420) again, and confirming that its value is "0"
C-32
For details on FX-30P operating procedure, refer to FX-30P Operation Manual.
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

, FX , FX , FX
3S 3G 3GC 3U
, FX , FX or FX
3G 3GC 3U
Program example
Changed program
5.1 Check Procedure
or FX PLC, check D8120
3UC
PLC, check D8420 using
3UC