Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) Commissioning - ForGe Control - Manual (Page 124)

124 Rockwell Automation Publication 7000-IN012B-EN-P - June 2014
Appendix A General Reference
Table 11 - PowerFlex Speed Regulation
Notes:
• Speed regulation is based on a percentage of motor synchronous speed.
• Encoder to be mounted on the AC machine
• Operational 15V DC Power Supply mounted in drive to power the
encoder as a standard option with the encoder feed back card.
• Customer is responsible for providing and mounting of encoder
• Sleeve bearing motors require the encoder to have an axial movement
tolerance.
• Recommended tachometers are shaft mounting type.
• Magneto resistive models are more adaptable to harsh environments.
• When installing, the encoder body and electronics must be isolated from
ground (options available from the encoder manufacturer to accomplish
this).
• There are usually limits on encoder cable lengths. Ensure the maximum
length is suitable for the application.
Encoder Frequency Output
<6 Hz 6...15 Hz >15 Hz
Without Encoder Not applicable 0.1% 0.1%
With Encoder 0.02% 0.01% 0.01%
With Encoder and HPTC
mode enabled 0.01% 0.01% 0.01%