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Author Topic: Power-up Timer  (Read 8995 times)

russher

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Power-up Timer
« on: August 14, 2014, 12:21:18 PM »
I am using a Do-More H2-DM1E CPU connected by Ethernet to a C-More EA9-T10CL. I want to have a timer in the Do-More that begins timing when the PLC is powered up and resets when the Do-More is powered down so it begins timing again on the next power up.
Any ideas of how to do this?
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plcnut

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Re: Power-up Timer
« Reply #1 on: August 14, 2014, 12:34:17 PM »
Use MATH along with the values stored in SDT0 (Current time), SDT1 (Date and time of last power-down) and SDT2 (Date and time of last power-up).
Or you can put a timer on a rung with NOT ST0.
« Last Edit: August 14, 2014, 12:36:01 PM by plcnut »
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russher

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Re: Power-up Timer
« Reply #2 on: August 14, 2014, 12:49:05 PM »
A timer on a rung with NOT ST0 is simple and effective. Thanks!
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plcnut

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Re: Power-up Timer
« Reply #3 on: August 14, 2014, 01:00:05 PM »
You're welcome.
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Circumstances don't determine who we are, they only reveal it.

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Premier Systems Integration, LLC
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Controls Guy

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Re: Power-up Timer
« Reply #4 on: August 14, 2014, 07:51:46 PM »
Yup, that's one difference between DL and Do-More.  You have to reset them if you want them to restart on prog-to-run transition (or I guess you could remove them from the retentive timer range).
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