Servo Reversing Polarity

[alfonsocareaga]

We have a servo (VPL-A0632F-P) and a drive (2198-H003-ERS), we're trying to reverse the direction of turn, the way it was originally commissioned has the movement forward as negative and we want the inverse . We have change the polarity offline in Designer 5000 but when the program is downloaded to the PLC, we always get a Start Inhibited bit which wont let us continue. The Kinetix drive shows a "Commutation not configured" message. For what I read, commutation should be set to motor offset since we are using a motor from the catalog.

Motor feedback test completes but the "Accept test results" stays grayed out. Motor and feedback test wont run because of the start inhibited bit.

Any suggestions or tips are appreciated,.

 

[alfonsocareaga]

Other things we've tried, changed the catalogue number for the motor to none and then change it back to the actual motor catalog number, tried deleting the axis and started from scratch.

 

[robertmee]

Start inhibited, you're missing the safe torque off signals to the drive. Do you have an external safety signal to the drive? If not, are the jumpers installed on the STO inputs?

 

[alfonsocareaga]

If the safe torque off signals are missing, shouldn't we get Start Inhibited all the time? If we change the polarity to inverted, it is inhibited. We change it back to normal and the Start Inhibited goes away. Can't verify right now, will do once I'm back onsite.

 

[robertmee]

Do you have any NOT or POT end of travels assigned to the digital inputs? That's the only thing I could think of that would be polarity sensitive from an enable standpoint.

 

[alfonsocareaga]

The only input is the registration sensor.

 

[OkiePC]

I don't have any experience with Logix 5000 motion, but do you have to run it through any commutation tests or tuning operation when making this change?

 

[alfonsocareaga]

I don't have any experience with Logix 5000 motion, but do you have to run it through any commutation tests or tuning operation when making this change?

Can't run tests because of the Start Inhibited bit. I'm trying to find what causes the bit to come on.