imloggedin
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Can i scale a tag to show 0-100 when reading values 500-10034 like you would do in a PLC?
Can you scale tags in Rsview32?
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widelto
Member
Try using an expresion, and the expression is the scale equation you normally use in a plc.
imloggedin
Member
OP
What is the scale equation? I cant seem to find it.
When you specify your tags in the database, you can specify a scale for them. This would just be a multiplier for the value of the tag. That multipier MUST be a decimal. I would always try to do any scaling or math in the PLC and then just send the values to the HMI. It uses more PLC memory, but then math isn't being done in multiple places
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imloggedin
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OP
This isnt the scaling im speaking of, its multiplication.
imloggedin
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OP
i figured it out
widelto
Member
The equation is y = mx + b, where y is the scalized value, x is the value from plc, m = (y1-y2)/(x1 -x2) and m if the offset. Y1= maximum, y2=minumum, x1=maximum, x2=minumum
It is basically the same concept used when scalizing thru plc.
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