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On an ATV21 or ATV212 how can the PID feedback be reversed?

Published date: 03 September 2019

Issue:
How do I reverse the PID feedback on an ATV21/212 drive?

Product Line:
Altivar 21, Altivar 212

Environment:
All

Cause:
Reversing the way the drive responds to feedback

Resolution:
If you want reverse the PID feedback, then you have to reverse the scaling of the analogue input (of the PID feedback) which has been chosen.
The scaling is set with the paramters : F201 up to F204 for VIA and F210 up to F213 for VIB.
Please, refer to the page F16-F17 of the user's manual.
For example, you have a 4-20mA sensor feedback on VIA and if you want reverse the scaling then set the parameter as follow :
F201=20% ; F202 = 50HZ and F203 = 100% and F204 = 0HZ.

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