Applicable Systems
MELSEC FX3U
MELSEC FX5U
FR-A800
FR-A700
MR-J4
iQ-R Motion Controller (R32MTCPU/R16MTCPU)
Symptoms
Safety circuit anomaly detected.
Possible Causes
- Safety input activated
- Safety relay fault
- Safety wiring fault
Troubleshooting Steps
- Step 1: Check safety input signal
Signal normal - Step 2: Verify safety relay
Relay functioning correctly - Step 3: Inspect safety wiring
Wiring intact
How to Reset
Reset via parameter unit after safety circuit is restored.
Source: Mitsubishi FR-A800 Instruction Manual, Mitsubishi Electric
Category: PLC & VFD