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Introduction Parameter x.00

Parameter

description format

Keypad and

display

CT Modbus

RTU

User

programming

CT Soft Menu 0

Advanced parameter

descriptions

Menu 5

Commander SK Advanced User Guide 57

Issue Number: 2 www.controltechniques.com

Although the range for scaling purposes is ±1500Hz, the actual parameter value can be increased beyond this range by slip compensation. This

parameter gives the output frequency of the drive, i.e. the sum of the post ramp reference and the slip compensation.

This is the modulus of the r.m.s. fundamental line-to-line voltage at the inverter output.

Total output power of the drive (positive for power flow out of the drive's output terminals). Output power of the drive is calculated from the in phase

components of voltage and current such that the total real power output is measured.

Where:

max

= 150% of drive rated current

The motor rpm is calculated from the post ramp reference (Pr 2.01). The speed of rotation is calculated as follows:

The result will be fairly accurate provided the slip compensation has been set up correctly with the rated full load speed parameter (Pr 5.08). This

calculation relies on the number of motor poles being set up correctly in Pr 5.11, or if auto mode is selected (Pr 5.11 = 0) then it relies on a reasonably

accurate value of motor rated speed being set in Pr 5.08 to allow correct calculation of the motor poles.

Voltage across the internal DC bus of the drive.

5.01 Output frequency

Coding