Produced and consumed tags stop at 500 bytes, and at 480 once the data crosses a network, because the transfer spends 20 of them on overhead. Try to produce an INT array and Logix Designer refuses: DINT, UDINT, LINT, ULINT, REAL and LREAL are the atomic types that go across on their own, and anything … Read more
The infeed conveyor’s GuardLogix 5580 consumes one safety tag from the case packer’s 5580, CP_Safe, and at 02:04 every night for a week CP_Safe.ConnStatus.ConnectionFaulted went to 1 for between two and nine seconds, the consumed data went to zero, the conveyor’s CROUT dropped its contactors, and the shift lead reset it and wrote “network” on … Read more
A TON with a .PRE of 5000 that sits in a subroutine only called in Auto, with its rung left true, is already done on the first scan back after twenty minutes in Manual. Publication 1756-RM018A-EN-P prints the arithmetic that explains it, ACC = ACC + (current_time – last_time_scanned), so the timer bills the whole … Read more
Station and line PLC split, a PackML state machine in Structured Text, torque tool error proofing, andon stops and downtime that blames the right station.