Flex IO to PLC5 addressing - PLCS.net

russrmartin · March 29th, 2005, 03:35 AM

Hey guys. I have a flex IO module 1794-IT8 that is talking via controlnet to a PLC5. The question I have is that the input in question appears to be scaled already by the time it reaches the PLC 5. That is, we are taking the raw integer that is coming from the FLexIO and displaying that exact # for the operators and calling it the Process Variable. I read the manual for the IT8 and am only confused even more. Can someone simply explain how the input is scaled and where I can get a visual of it. This is just for personal understanding for future reference. Thanks.

Russ

rdrast · March 29th, 2005, 05:01 AM

The input is scaled based on the channel configuration (mV/TC, and what TC type), and is indeed scaled properly into engineering units scaled up by 10. The Data Type can be configured programmatically, but defaults to degrees C. Other options are Degrees F, Raw bipolar, and Raw unsigned integer.

The PDF manual can be found at:
http://literature.rockwellautomation...m007_-en-p.pdf

March 29th, 2005, 03:35 AM	#1
russrmartin Member Join Date: Aug 2002 Location: Eastman, Wisconsin Posts: 735	Flex IO to PLC5 addressing Hey guys. I have a flex IO module 1794-IT8 that is talking via controlnet to a PLC5. The question I have is that the input in question appears to be scaled already by the time it reaches the PLC 5. That is, we are taking the raw integer that is coming from the FLexIO and displaying that exact # for the operators and calling it the Process Variable. I read the manual for the IT8 and am only confused even more. Can someone simply explain how the input is scaled and where I can get a visual of it. This is just for personal understanding for future reference. Thanks. Russ

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March 29th, 2005, 05:01 AM	#2
rdrast Lifetime Supporting Member Join Date: Apr 2003 Location: South Carolina Lowcountry Posts: 3,639	The input is scaled based on the channel configuration (mV/TC, and what TC type), and is indeed scaled properly into engineering units scaled up by 10. The Data Type can be configured programmatically, but defaults to degrees C. Other options are Degrees F, Raw bipolar, and Raw unsigned integer. The PDF manual can be found at: http://literature.rockwellautomation...m007_-en-p.pdf

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