Networks & drives

AUMA AC 01.2 actuator dead on WD-Timeout after a cabinet swap

Reed Callahan · I&C · water

Wastewater, Profibus DP, AUMA AC 01.2. After we moved the starter bucket the actuator LCD boots then dies on WD-Timeout. Same address, same GSD. Comms LED on the master looks healthy. Is this a 24 V sag, a termination, or the actuator firmware fighting the new PSU?

Leila Okonkwo · Field tech
WD-Timeout on AC 01.2 after a bucket swap is almost always the 24 V coming up slower than the board watchdog. Measure at the actuator, not the panel. If it dips under 21 V at boot, the head never finishes init. We also had a Profibus terminator left OFF on the new bucket. Don't reflash until those two are clean.

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