5 posts in this topic

Hi Everyone,

I have a PowerFlex 525, in Velocity Mode with a Encoder Card "25-ENC-1". We are controlling this drive via TCP/IP with a 1769-L32.

Through the PLC if I try to toggle the Bit for "Pos Redefine" in A560 [Enh Control Word] it instantly turns back to 0. But through the Parameter List Editor I am able to toggle A560.

For My function I need to have the drive in Velocity Mode, If I change the drive to Position Mode I am able to toggle "Pos Redefine"

 

Any Thoughts would be great

 

 

 

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Bump 1

Edited by netprof

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A POS by any other name is still a POS. 

 

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On 6/14/2016 at 10:07 PM, RussB said:

A POS by any other name is still a POS. 

 

Funny, Is there anyone familiar using the Encoder card on the Powerflex Drives?

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We went through this ~ 2-3 years ago, but I was not on that project.  Have you consulted with A-B Tech Support?  What I remember is that there are certain bits/conditions that need to be in the right state to make the position redefine work.  

When you redefine the position, is the VFD enabled?  One might have to disable the drive, define the position, look for the handshake (or compare position), then enable the drive.

In discussing with A-B Tech Support, you might find that you cannot simply toggle a redefine bit and move 0 into the position register.  You might have to use a SSV command to set the value.

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