Troubleshooting - Mitsubishi Electric FX3U-232-BD User Manual

FX Series PLC User's Manual - Data Communication Edition
Inverter Communication

11. Troubleshooting

This chapter explains troubleshooting and error codes.
11.1 Checking FX PLC Version Applicability (FX
Verify that the FX PLC main unit is an applicable version for inverter communication.
11.2 Checking Communication Status Based on LED Indication
Check the status of the "RD(RXD)" and "SD(TXD)" indicator LEDs provided in the optional equipment.
RD
Flashing
Flashing
Off
Off
11.3 Checking Installation
1. Mounting status
If the communication equipment is not securely connected to the PLC, communication is not possible.
2. Power supply (for FX
The FX -485ADP requires a driving power supply. Verify that the power supply is provided correctly.
0N
3. Wiring
Verify that the wiring to all communication equipment is correct. If the communication equipment is wired
incorrectly, communication is not possible.
11.4 Checking Sequence Program
1. Communication setting in the sequence program
Verify that N:N Network (D8173 to D8180) and parallel link (M8070 and M8071) are not set.
After changing any setting, make sure to turn OFF the PLC power, and then turn the power ON again.
2. Communication setting using parameters
Verify that the communication settings using parameters are correct. If the contents of the parameters do not
agree, communication will not function correctly.
After changing any parameters, make sure to turn OFF the PLC power, and then turn the power ON again.
3. 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 inverter
communication. After changing the setting, make sure to reboot the PLC's power.
E-134
LED status
SD
Flashing
Off
Flashing
Off
For mounting method, refer to the respective communication equipment manual.
-485ADP)
0N
, FX , FX
3S 3G
11.1 Checking FX PLC Version Applicability (FX2N and FX2NC Series)
and FX
2N
For version applicability, refer to Section 1.3.
Operation status
Data is being sent or received.
Data is received, but is not sent.
Data is sent, but is not received
Data is not sent nor received.
For wiring method check, refer to Chapter 4.
, FX and FX
3GC 3U 3UC
11 Troubleshooting
Series)
2NC
PLCs)