Low Cost PLC w/ Math & Setpoint update?

bobnbama · Apr 16, 2008

Application for monitoring process input over several days - alarm if exceeds setpoint. Need to average rolling input values and update setpoint based on average with defined tolerance.

Now recording on PLR and manually averaging and updating setpoints. I appreciate any suggestions for upgrade.
Thanks
Bob

mrtweaver · Apr 16, 2008

You might want to look at the Horner line. www.heapg.com they have some really cost effective units and they have the math functions and such built in. Their software is also free. Check it out and let me know what you think.

bobnbama said:
Application for monitoring process input over several days - alarm if exceeds setpoint. Need to average rolling input values and update setpoint based on average with defined tolerance.

Now recording on PLR and manually averaging and updating setpoints. I appreciate any suggestions for upgrade.
Thanks
Bob

Stephen Luft · Apr 17, 2008

Bob,

You haven't stated what your input devices for monitoring will be, but any PLC should suffice.

If you are interested, you can discuss your application with us and we can configure a PLC for your requirements.

Our link is in my signature and our contact information is at our web site.

Please note that I am a representative for Entertron.

God Bless,

bobnbama · Apr 17, 2008

mrtweaver said:
You might want to look at the Horner line. www.heapg.com they have some really cost effective units and they have the math functions and such built in. Their software is also free. Check it out and let me know what you think.

Thanks for the suggestion - I'll take a look.

bobnbama · Apr 17, 2008

Stephen - The really low cost PLC or PLR can't do the math and averaging, etc. The most economical next step up may be the AB Pico GFX. Still researching this. The input data is pulse inputs over a 24 hour day. Thanks for your reply.

Stephen Luft · Apr 18, 2008

Bob,

How many pulsed inputs do you have and how fast are they?

A smart relay was not meant to do the type of calculations you are trying to do.

bobnbama · Apr 18, 2008

Thanks for your comment Stephen. More testing next week - my input can handle 1Hz

Low Cost PLC w/ Math & Setpoint update?

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