Treatment plant, CompactLogix 1769-L33ER, v32, FactoryTalk View SE on top, about 1200 alarms configured with ALMD and ALMA instructions in the PLC.

Every time the plant starts after a shutdown or a power blip, roughly 200 alarms fire at once. Low flow on every filter, low pressure on every header, low level on the clearwell pumps, all because nothing is running yet. The operators hit ack all without reading, and last month they acked a real high chlorine alarm along with the flood.

Tried: a global alarm inhibit for 5 minutes after power-up. Works for the flood, but it hides real alarms for 5 minutes and the plant manager said no. Raised a few low limits, they just fire a bit later.

What do people do about this? I'd rather fix it in the PLC than in the SCADA if there's a choice.