PLCXSRVerified · sol.ls-electric.com
XSR SYNC-FAIL — Dual-channel Input Simultaneity Fail
Warning — monitor
CAUSE
Why does it occur?
Simultaneity between INPUT1 and INPUT2 not respected (within 1 sec); LEDs IN1-IN2/FAIL flash alternately
REMEDY · Step by step
How to fix it?
Open then close INPUT1 and INPUT2 again respecting simultaneity to reactivate the outputs
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 ↗XSR-OS2C/S Safety Relay Manual V1.0 (Eng)
3.4 LED Indicator · p.21 · V1.0