I'm reviewing the FR5 sample-check interface because our application sometimes misses the PLC request. It's a brief pulse and the notes don't clearly say who owns or clears it. Reference plate in the cell. This is only the ordinary job handshake; independently engineered safety controls remain separate.
Short sample requests disappear between our application reads
IsabelBaker0474 · 29 Jul 2026, 20:39 UTC
1 reply
Replying to IsabelBaker0474
Can the PLC and application owners agree a request-and-acknowledgement sequence with explicit clearing, timeout and restart cases, then review it against a captured missed request before implementing anything? Faster polling alone would leave the ownership ambiguity intact, and none of this replaces the separate safety controls.
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