Scaling an analog value
- jroddds
- Offline
- New Member
Less
More
- Posts: 13
- Thank you received: 0
13 Jun 2020 19:23 - 13 Jun 2020 19:27 #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
Last edit: 13 Jun 2020 19:27 by jroddds.
Please Log in or Create an account to join the conversation.
- PCW
- Offline
- Moderator
Less
More
- Posts: 17967
- Thank you received: 4824
13 Jun 2020 19:48 #171474
by PCW
Replied by PCW on topic Scaling an analog value
setp hm2_7i76e.0.7i76.0.0.analogin0-scalemax 363
Please Log in or Create an account to join the conversation.
- jroddds
- Offline
- New Member
Less
More
- Posts: 13
- Thank you received: 0
14 Jun 2020 19:29 #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?
Please Log in or Create an account to join the conversation.
- PCW
- Offline
- Moderator
Less
More
- Posts: 17967
- Thank you received: 4824
14 Jun 2020 19:35 #171633
by PCW
Replied by PCW on topic Scaling an analog value
I took the default scaling (in volts = 36.3v full scale) and multiplied by 10
Please Log in or Create an account to join the conversation.
Time to create page: 0.076 seconds