ServoMR-J4Verification pending — cross-check with the official manual
MR-J4 AL.68 — STO diagnosis error
Trip — immediate stop
CAUSE
Why does it occur?
- - An error of STO input signal was detected. Detail No. Detail name Cause Check method Check result Action Target 68.1 Mismatched STO signal error (
- STO1 and STO2 are not inputted correctly. Check if the STO1 and STO2 of CN8 connector are wired correctly. It is not wired correctly. Wire it correctly. [A] [B] [WB] [GF] It is wired correctly. Check (2). (
- The input states of STO1 and STO2 are di
REMEDY · Step by step
How to fix it?
Check the STO circuit and safety function wiring, and consider replacing the amplifier
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.
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