PLCXGRVerified · sol.ls-electric.com
XGR 40 — Scan Watchdog Error
Trip — immediate stop
CAUSE
Why does it occur?
The scan time of a program exceeds the scan delay watchdog time set by parameter
REMEDY · Step by step
How to fix it?
Check WDT, modify parameter or program, then restart (cold)
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
Verified · sol.ls-electric.com
Open PDF ↗XGR CPU Module User Manual V2.9 202412 (Eng)
15.5 Error Codes List · p.252 · V2.9