AB 1794-IE8 Analog scaling

said-art

Member
Join Date
Jan 2017
Location
Aksai
Posts
5
Hi,

I am using an Analog Input Module - 1794/IE8
My Analog Input Module is configured for 0-20mA

Unscaled Max = 31208
Unscaled Min = 6241.6
Engineering Unit Max = 100
Engineering Unit Min = 0

I have ST scaling code which works only for positive values.


Scaled value := Raw value * 1.25/31208 * 100 - (0.25 * 100);


The question is how can I get minus values? For example if I want use it for measuring negative temperature.

Unscaled Max = 31208
Unscaled Min = 6241.6
Engineering Unit Max = 100
Engineering Unit Min = -50


Thanks in advance
 

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