Mitsubishi FR-A800 Error Code E.20

Mitsubishi PLC & VFD Minor System

Model: FR-A800 | Code: E.20

Applicable Systems
MELSEC FX3U MELSEC FX5U FR-A800 FR-A700 MR-J4 iQ-R Motion Controller (R32MTCPU/R16MTCPU)

Symptoms

Sequence function user-defined anomaly (type 20).

Possible Causes

  • User logic error in sequence function
  • Sequence function parameter error
  • Logic conflict

Troubleshooting Steps

  1. Step 1: Check sequence function logic
    Logic correct
  2. Step 2: Verify sequence parameters
    Parameters valid
  3. Step 3: Debug user-defined logic
    Logic executes correctly

How to Reset

Reset via parameter unit after sequence logic is corrected.

Related Mitsubishi Fault Codes

Source: Mitsubishi FR-A800 Instruction Manual, Mitsubishi Electric

Category: PLC & VFD