Checking Sequence Program - Mitsubishi Electric FX3U-232-BD User Manual

FX Series PLC User's Manual - Data Communication Edition
Remote Maintenance
8.6.3

Checking sequence program

1. Checking the contents of the communication setting
Verify that no communication format (D8120, D8400, D8420), N:N Network: D8176 to D8180, and Parallel
Link: M8070 and M8071) is being used in the sequence program.
If any communication format is being used in the sequence program, communication will not function
correctly.
2. Ethernet port setting (in FX
Verify that the same channel is not used in the Ethernet port setting. Do not set the channel used in remote
maintenance.
After changing the setting, make sure to reboot the PLC's power.
3. Presence of VRRD and VRSC instructions
1) Except FX
3G
Verify that the VRRD and VRSC instructions are not used in the program.
If these instructions are used, delete them, turn OFF the PLC power, and then turn the power ON again.
2) In FX PLC
3G
- In the case of the 14 points and 24-point type
Verify that the VRRD and VRSC instructions are not used in the program.
If these instructions are used, delete them, turn OFF the PLC power, and then turn the power ON again.
- In the case of the 40 points and 60-point type
Verify that the VRRD and VRSC instructions are not used in the program.
If these instructions are used in the program, the communication function is not available in ch2.
Use ch1, or delete these instructions.
After deleting these instructions, turn OFF the PLC power, and then turn the power ON again.
3) In FX and FX
3U
Verify that the VRRD and VRSC instructions are not used in the program.
If these instructions are used in the program, the communication function is not available in ch1.
Use ch2, or delete these instructions.
After deleting these instructions, reboot the PLC's power.
4. Presence of RS instruction (except FX
Verify that the RS instruction is not used in the program.
If this instruction is used, delete it, turn OFF the PLC power, and then turn the power ON again.
5. Presence of RS and RS2 instructions (in FX
Verify that the RS and RS2 instructions are not being used for the same channel.
If these instructions are used for the same channel, revise them, turn OFF the PLC power, and then turn the
power ON again.
6. Presence of EXTR instruction (in FX
Verify that the EXTR instruction is not used in the program.
If this instruction is used, delete it, turn OFF the PLC power, and then turn the power ON again.
7. Presence of IVCK, IVDR, IVRD, IVWR, IVBWR
FX , FX and FX
3GC 3U
Verify that the IVCK, IVDR, IVRD, IVWR, IVBWR and IVMC instructions are not being used for the same
channel.
If these instructions are used for the same channel, revise them, turn OFF the PLC power, and then turn the
power ON again.
*1. Only available for FX
8. Presence of ADPRW instructions (in FX
Verify that the ADPRW instructions are not being used for the same channel.
If these instructions are used for the same channel, delete them, and reboot the PLC's power.
9. Presence of FLCRT, FLDEL, FLWR, FLRD, FLCMD, and FLSTRD instructions (in FX
FX PLCs)
3UC
Verify that the FLCRT, FLDEL, FLWR, FLRD, FLCMD and FLSTRD instructions are not being used for the
same channel.
If these instructions are used for the same channel, delete them, reboot the PLC's power.
, FX , FX
3S 3G
, FX and FX PLCs
3U 3UC
PLCs
3UC
2N
PLCs)
3UC
and FX PLCs.
3U 3UC
, FX and FX PLCs)
3GC 3U 3UC
, FX , FX , FX and FX
3S 3G 3GC 3U
, FX , FX , FX
3S 3G 3GC
and FX PLCs)
2NC
*1
, and IVMC instructions (in FX
, FX , FX , FX
3S 3G 3GC 3U
8 Troubleshooting
8.6 Checking Setting in PLC
PLCs)
3UC
and FX PLCs)
3U 3UC
, FX
3S 3G
and FX PLCs)
3UC
3U
A
B
C
D
E
F
G
H
,
I
and
Apx.A
I-57