SCN 4586 Added the ability to use drive scaled precision for Multi-Axis SERCOS drives. However, it unintentionally got applied to Velocity controlled Axes like Feeders and Die Accelerators as well.

This issue exists in version 4 and version 5 controllers. Any customer using SERCOS who updates software version x.81.00 through x.84.00 to version x.81.01 or higher may need make some adjustments. It depends on if the drive was commissioned using one of the XL versions in the affected range. Older versions will have configured the S-0-0046 Velocity Data Scaling Exponent to the correct value of -5. This setting changes where the implied decimal point of all Velocity parameters or velocity data is assumed to be. With the wrong setting the customer or tech will have had to lie to the drive in order to scale the command signal to the drive properly. If the lying took place, after the update, the scaling will need to be corrected using the S-0-0091 Bipolar Velocity Limit. It may be off by one or more factors of 10. On Die Accelerators die test will need to be run again after the adjustment.

Symptoms of an incorrect scaling value may include Drive Not Responding Errors or oscillations that were not present prior to the update.