
Configuring the UDC Module’s Registers
3-47
Revolutions Per Minute Register 217/1217
The Revolutions Per Minute register contains the speed of the motor
in RPM. A positive number in this register indicates a forward
direction; a negative number indicates a reverse direction.
Sug. Var. Name: RPM%
Units: RPM
Range: N/A
Access: Read only
Note that this register is not intended for closed loop control.
Slip Feedback Register (Vector) 218/1218
In Vector mode, register 218/1218 functions as the Slip Feedback
register. This register displays the amount of rotor slip. The displayed
value is equal to Hertz times 100. For example, 5 Hz would be
displayed as 500.
Sug. Var. Name: SLIP_FB%
Units: Hz
∗
100
Range: N/A
Access: Read only
Carrier Frequency Register (V/Hz) 218/1218
In Volts per Hertz mode, register 218/1218 functions as the Carrier
Frequency register. This register contains the drive’s present carrier
frequency. The value is scaled in kHz
∗
10.
Sug. Var. Name: CARR_FB%
Units: kHz
∗
10
Range: N/A
Access: Read only
Selected Variable Register 219/1219
The Selected Variable register contains the value of the variable that
is selected for display on PMI meter port 4.
Sug. Var. Name: SEL_VAR%
Units: N/A
Range: N/A
Access: Read only
This register provides monitoring of data in the UDC module that is normally only available within the PMI
regulator. Refer to chapter 2 for more information on displaying variables on the PMI Regulator’s meter
ports.
(Unused) 220/1220
Reserved for future use
Sug. Var. Name:
Units:
Range:
Access:
(Unused) 221/1221
Reserved for future use
Sug. Var. Name:
Units:
Range:
Access:
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