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TON never reaches DN, accumulator climbs a few ms then resets to 0

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(@hanab)
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Joined: 1 year ago
Posts: 0
Topic starter   [#177]

Teaching myself Studio 5000 on Emulate, V33, ahead of a machine we're quoting on a CompactLogix instead of the usual 1200. A part sits on a photoeye and after 3 seconds a pusher output should fire. Simple TON, preset 3000ms.

The timer never gets to DN. Online, .ACC goes to 2, 5, sometimes 10, then straight back to 0, and .EN blinks. The photoeye input I'm simulating stays on, I can see the bit is 1 the whole time.

```
PE_Part ---] [--- [ONS] ---[TON Pusher_Delay PRE 3000 ACC 0]
```

I tried changing the preset to 3 in case it wanted seconds not ms and that made no difference, so then I made a new timer tag in case the old one was corrupt. Same again.

Does the TON need something on the rung I'm missing, or could it be the emulator resetting it? Not sure about that ONS, it's the only thing on the rung I've not tried taking out.


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