F-81
FX Series PLC User's Manual - Data Communication Edition
Non-Protocol Communication (RS/RS2 Instruction)
11 Troubleshooting
11.1 Checking FX PLC Version Applicability
A
Common Items
B
N:N Network
C
Parallel Link
D
Computer Link
E
Inverter
Communication
F
Non-Protocol
Communication
(RS/RS2 Instruction)
G
Non-Protocol
Communication
(FX
2N
-232IF)
H
Programming
Communication
I
Remote
Maintenance
Apx.
Discontinued
models
11. Troubleshooting
This chapter explains troubleshooting and error codes.
11.1 Checking FX PLC Version Applicability
Verify that the FX PLC main unit is an applicable version in non-protocol communication.
→ For version applicability, refer to Section 1.3.
11.2 Checking Communication Status Based on LED Indication
Check the status of the "RD" and "SD" indicator LEDs provided in the optional equipment.
11.3 Checking Installation
1. Mounting status
If the communication equipment is not securely connected to the PLC, communication is not possible.
→ For mounting method, refer to the respective communication equipment manual.
2. Power supply (for FX0N-485ADP)
The FX0N-485ADP requires a driving power supply. Verify that the power supply is provided correctly.
3. Wiring
Verify that the wiring to an communication equipment is correct. If the communication equipment is wired
incorrectly, communication is not possible.
→ For wiring method check, refer to Chapter 4.
LED status
Operation status
RD SD
Flashing Flashing Data is being sent or received.
Flashing Off Data is received, but is not sent.
Off Flashing Data is sent, but is not received
Off Off Data is not sent nor received.
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