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Scaling an analog value
6 years 4 months ago #171470
by jroddds
Scaling an analog value was created by jroddds
After a lot of searching without success, I could use some help.
My VFD will output an analog signal 0-10v that coincides with the current it is drawing. I wanted to use this with the 7i76e board to make a pyVCP meter that displays the spindle load.
I have it working for the most part, but I can't figure how to scale the 0-10v signal to create a 0-100% spindle load. The meter on my panel sees the 2v. I just can't figure out how to scale it up 10x.
As a last resort, I can just set the meter from 0-10 in volts rather than 0-100 percent.
net mymeter <= hm2_7i76e.0.7i76.0.0.analogin0
Thanks
My VFD will output an analog signal 0-10v that coincides with the current it is drawing. I wanted to use this with the 7i76e board to make a pyVCP meter that displays the spindle load.
I have it working for the most part, but I can't figure how to scale the 0-10v signal to create a 0-100% spindle load. The meter on my panel sees the 2v. I just can't figure out how to scale it up 10x.
As a last resort, I can just set the meter from 0-10 in volts rather than 0-100 percent.
net mymeter <= hm2_7i76e.0.7i76.0.0.analogin0
Thanks
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6 years 4 months ago #171474
by PCW
Replied by PCW on topic Scaling an analog value
setp hm2_7i76e.0.7i76.0.0.analogin0-scalemax 363
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6 years 4 months ago #171632
by jroddds
Replied by jroddds on topic Scaling an analog value
That works. Thank you. In my searches, I never saw the scalemax term used. Would you mind explaining how you arrived at the 363 value?
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