F-88
FX Series PLC User's Manual - Data Communication Edition
Non-Protocol Communication (RS/RS2 Instruction)
11 Troubleshooting
11.4 Checking Sequence Program
11.4
Checking Sequence Program
1. Communication settings in a sequence program
Verify that N:N Network (D8176 to D8180) and parallel link (M8070 and M8071) are not set.
Verify that the communication format (D8120, D8370, D8400 or D8420) is set correctly. If a communication
port is set more than once, communication is not possible.
2. Communication settings using parameters
Verify that the communication settings using parameters are correct. If the contents of the settings do not
agree, communication will not function correctly.
After changing any settings, make sure to turn OFF the PLC power, and then turn the power ON again.
3. Ethernet port setting (in FX
3S
, FX
3G
, FX
3GC
, FX
3U
and FX
3UC
PLCs)
Verify that the same channel is not used in the Ethernet port setting. Do not set the channel used in non-
protocol communication (RS/RS2 Instruction). After changing the setting, make sure to reboot the PLC's power.
4. Presence of VRRD and VRSC instructions
1) Except FX
3G
, FX
3U
and FX
3UC
PLCs
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
3G
PLC
- 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
3U
and FX
3UC
PLCs
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.
5. Presence of IVCK, IVDR, IVRD, IVWR, IVBWR
*1
, and IVMC instructions (in FX
3S
, FX
3G
,
FX
3GC
, FX
3U
and FX
3UC
PLCs)
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
3U
and FX
3UC
PLCs.
6. Presence of ADPRW instructions (in FX
3S
, FX
3G
, FX
3GC
, FX
3U
and FX
3UC
PLCs)
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.
7. Presence of EXTR instruction (in FX
2N
and FX
2NC
PLCs)
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.
8. Presence of RS and RS2 instructions
Verify that two or more RS/RS2 instructions are not being driven for the same channel.
If two or more RS/RS2 instructions are driven, modify the program so that only one RS/RS2 instruction is
driven.
9. Presence of FLCRT, FLDEL, FLWR, FLRD, FLCMD, and FLSTRD instructions (in FX
3U
and
FX
3UC
PLCs)
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.
Summary of Contents for FX-485ADP
Page 2: ......
Page 120: ...B 2 FX Series PLC User s Manual Data Communication Edition N N Network ...
Page 188: ...C 2 FX Series PLC User s Manual Data Communication Edition Parallel Link ...
Page 244: ...D 2 FX Series PLC User s Manual Data Communication Edition Computer Link ...
Page 344: ...E 2 FX Series PLC User s Manual Data Communication Edition Inverter Communication ...
Page 700: ...H 2 FX Series PLC User s Manual Data Communication Edition Programming Communication ...
Page 752: ...I 2 FX Series PLC User s Manual Data Communication Edition Remote Maintenance ...
Page 817: ......