ServoMR-J4Verification pending — cross-check with the official manual
MR-J4 AL.74 — Option card error 1
Trip — immediate stop
CAUSE
Why does it occur?
- - MR-J3-T10 came off. - MR-J3-T10 is not properly recognized. Detail No. Detail name Cause Check method Check result Action Target 74.1 Option card error 1 (
- The MR-J3-T10 came off during the CC-Link IE communication. Check if the MR-J3-T10 is mounted correctly. It is not mounted correctly. Install it correctly. [RJ010] It is mounted correctly. Check (2). (
- MR-J3-T10 is malfunctioning. Replace
REMEDY · Step by step
How to fix it?
Check the mechanical coupling and the scale mounting condition
Do not reset repeatedly before identifying the cause. Repeated resets while ignoring a trip/alarm can cause secondary damage (IGBT failure, motor winding damage, etc.).
SOURCE
Related manual page
Summary based on the official Mitsubishi Electric manual. For accurate and complete information, always consult the official manual.
Open official manual ↗