zach_zachary1@yahoo.com

AB Power Flex Drive Analog not showing 0%

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Hi everyone,  I have AB Powerflex drive 755s.  I am trying to trim the analog to 0% speed indication on my SCADA system.  Currently it  shows 0.23% speed when the motor is not running.  I tried trimming down the analog from the drive.  It got me close but not all the way.  3.999 mA = -0.01% and 4.000 mA = 0.01 % speed on SCADA.  Is there an easy way in RS Logix 5000 to make 3.90 - 4.10 mA equal 0.00% speed?  

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Not directly, but you can by using a tag to hold the value.

if analogsignal < 4.10 then tempsignal := 0

else

tempsignal := analogsignal

then use tempsignal in your math and hmi or wherever instead of the actual analog tag.

Edited by TravisPedley

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