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Chuck Norris

SCL2(486) Scaling for OMRON PLC's

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Hello people, I'm a novice to PLC programming so be aware that some questions might be silly beyond any limits. I cannot find the explication for this instruction (actually for the parameter word P1). I can see it's formed of 4 words but which one is what. I need it to convert the 4-20mA signal into 4000 increments which will measure the conductivity/concentration. General idea was that Source word is conductivity (in increments) and result word is concentration (two of them, separate, one for acid and the other for alkali).

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The W340 manual will provide the information you are looking for. Here is a link to the manual, W340 at Mr.PLC.com Hope this will help.

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Thanks gtsuport, I'll look right away... Gosh! What's the time in Michigan now? Edited by Chuck Norris

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Have you had a look at Sleepy's scale with parameters FB? http://forums.mrplc.com/index.php?autocom=downloads&showfile=523

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Thanks I did, but don't know if it's helping me. Can anyone explain the SCL2 function? If I understood corectly there are three parameter words, P1 (offset which is in my case zero), P1+1 (X number of increments - in my case the full scale is 4000 BCD = 0FA0 HEX is what I should enter) and P1+2 (Y full scale conductivity - for exemple 1000 mS/cm in BCD that means I should enter 1000 and not 03E8). To conclude should the last parameter word be entered in BCD or in HEX like two first words?

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Here is another that is really easy to use from Sleepy. http://forums.mrplc.com/index.php?autocom=downloads&showfile=283 Quite frankly I have not used the SCL functions for years but I certainly do use APR for all sorts of things including scaling. Edited by BobB

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See below... Notice the diff in values ie &4000 is decimal = HEX #0FA0 and #1000 BCD

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Hey Sleepy, how do you get CX-P to put the functions horizontally? Takes up a lot less screen space vertically. Have not found that one yet.

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Here ya go Bob. Does this help? I didn't know that either. Thanks Sleepy.

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AH!!!! I see it now.

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Hey Bob.. this might help for other programs

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