thrse

THRSe, TSAM and FSBM: The Four Sensors and the Sequence That Has to Hold

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A conveyor in plan with a light curtain in the middle and four muting sensors, S1 and S2 before it and S3 and S4 after it, each labelled with its position in the forward and reverse sequences, and the four timer windows S1-S2, S2-LC, LC-S3 and S3-S4 drawn as spans between them, with the note that each timer is 5 to 180,000 ms or 0 to switch that check off, the Maximum Mute Time is 0 to 3600 s and the Maximum Override Time is 0 to 30 s with a hold-to-run device

THRSe, TSAM and FSBM: The Four Sensors and the Sequence That Has to Hold An FSBM instruction sitting at Fault Code 16#9121 has already told you where to look, and it is not a sensor alignment problem yet. The third digit of that code is the step number: the instruction was in step 2 of … Read more

The Safety Task on a GuardLogix: What Runs In It, What Cannot, and How to Pick the Period

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Safety Task Properties drawn as a panel of fields and values: Task type Periodic fixed, Period 20 ms with the range 2 to 500 ms and the note that it cannot be edited online, Priority 1 recommended, Watchdog 20 ms with the range 2 to 500 ms and the requirement that it be less than or equal to the period, one safety task per controller that cannot be deleted, routine language Ladder Diagram only, and the resettable maximum observed scan time

The Safety Task on a GuardLogix: What Runs In It, What Cannot, and How to Pick the Period The Safety Task Properties dialog on a GuardLogix 5580 takes a period between 2 and 500 ms and a watchdog between 2 and 500 ms, and the safety reference manual is explicit that the watchdog has to … Read more

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