Can't find an Extended Pulse Timer (TP and LTP)

2023-12-21T17:43:16.540000Z

Here is my work-around FBD.

Can't find an Extended Pulse Timer (TP and LTP)

2023-12-21T17:42:32.224000Z

I came up with an FBD that seems to be working, although it may not be a true Retriggerable Pulse timer. There may be some delay associated with the two MOVE functions and ADD function I incorporated. I'd be interested if anyone is able to come up with something cleaner.

I am surprised that this is not a built-in function block of the CodeSYS library. This is a common feature of multi-function timer relays. I also attached a page from the cut sheet of a Schneider relay that shows 10 timing functions. Looks like the CodeSYS library has built-in function blocks for only 3 of the 10.

Can't find an Extended Pulse Timer (TP and LTP)

2023-12-06T19:01:59.107000Z

Hello,

For my program I need an extended pulse timer, which can be referred to as a retriggerable pulse timer. Where every rising edge of the input resets the elapsed time zero, extending the lenght of the output pulse. The Codesys pulse timer (TP) is a one-shot timer and only resets the elapsed time with the falling edge of the input.

There is also a pulse timer (LTP) in codesys, but in my simulation it was also functioning as a one-shot even though the description sounds like LTP should be retriggerable.

I have uploaded some timing plots from another PLC program for reference. I am looking for a timer equivalent to the "TEP" diagram.

Is there an Extended Pulse Timer in Codesys? Maybe there is a way to manipulate the input so it resets the elapsed time outside the function block?

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Can't find an Extended Pulse Timer (TP and LTP)

Can't find an Extended Pulse Timer (TP and LTP)

Can't find an Extended Pulse Timer (TP and LTP)