I am using a SLC 5/04 on a devicenet network with E3 overloads and a touchscreen (proface quickpanel).

I cannot for the life of me figure out how the average current in amps word (ID 4) is being formatted. Say for example if I go online in RSNetworx and monitor the instance, you can see the average current is around 34.5, if you look at that word copied to an N file online in RSLogix it is around 22700. If you look at it in binary, it seems that only the most significant byte of the word is being used, except the LSbit which is always 1. (for example 01011011 00000001)

I looked at it in binary, trying to decifer the ways in which they could have formatted the file. No luck

Since the E3s are so common, i'm sure many of you have worked with them before. A little help?


Regards

I don't have a copy in front of me, but the User's Manual for the E3 should give you some insight as to the "raw" data range for that parameter. It will be something like -32767 to 32768 or 0 to 32767. Once you know these values, you can use the SCP instruction to scale into engineering units like 0 to 100 amps.

Thanks for the response. I do have the manual, and have looked for anything that indicates the data range/format. This is the only relevant thing which I have come across:

There must be a problem with your mapping/explicit messaging if the data shown while monitoring in RSNetworx differs from that of your N File.

The current will show as an integer. IE a value of 345 for 34.5 Amps.