Powerflex 753 not following Ethernet Commands.

[HoldenC]

I have a Powerflex 753 that I can start with ethernet commands.

However, it doesn't follow the speed reference. It only runs at 60HZ.

Parameter 545 is set to Port 0-Port 4 Reference.

Can anyone offer any assistance ?


Thanks.

 

[plvlce]

Parameter 545 is set to Port 0-Port 4 Reference

What do you have plugged into Port 4? What does the reference value from Port 4 (parameter 874) show?

 

[HoldenC]

874 shows 47.5

This is the reference I am trying to achieve.

 

[plvlce]

When it is running (at the incorrect speed), check parameter 935 (Drive Status 1) bits 10-14 to see what it is actually using as its speed reference.

 

[HoldenC]

If the first bit is counted as zero, we are showing 00001 ( Auto, Ref A)

 

[plvlce]

Does 592 also show 47.5?

Check you don't have a multiplier (549) or a minimum speed limit (522 for forward, 523 for reverse)

Running out of ideas here...

 

[HoldenC]

522 and 523 are set at 60hz and -60hz.

How do I change them ?

 

[HoldenC]

nevermind. I just changed them. It took a while for it to update.

We seem to be on track now. Command Matches Current.

 

[plvlce]

522 and 523 are set at 60hz and -60hz.

That would certainly explain it.

 

[HoldenC]

Thanks so much for all your help.

I think i learned a little about the 753 drives today.

 

[plvlce]

Glad to be of assistance.