CARLO GAVAZZI RVBS, Manual

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Motor Controllers AC Variable Frequency Drives
RVBS
Specifications are subjected to change without notice.10/08/2021
17
D05 0x0505 Motor Voltage - R -
0.1Vr
ms
D06 0x0506 DC Bus Voltage - R - V
D07 0x0507 Drive Temperature - R -
℃
D08 0x0508 Switch-on Time X R - Hours
D09 0x0509 Drive Run Time X R - Hours
D10 0x050A Device Address - R - -
D11 0x050B
Modbus Communication
Error
- R - -
D12 0x050C Latest Alarm Contents - R - -
D13 0x050D Last Alarm Contents - R - -
D14 0x050E
Second Last Alarm
Contents
- R - -
D15 0x050F
Third Last Alarm
Contents
- R - -
D16 0x0510 Firmware Release - R - -
4.2
Motor control
Control mode of the inverter determines the way of itself to control the motor which operates door or
compressor. RVBS adapts V/F control with two options to regulate speed of compressor. The options are
described in below:
- V/f control with slip compensation inactive (F24=0) In this control, the inverter controls a motor by the
voltage and frequency according to the V/f pattern specified by function codes.
- V/f control with slip compensation active (F24=2) Applying any load to an induction motor causes a
rotational slip due to the motor characteristics, decreasing the motor rotation. The inverter’s slip compensation
facility first presumes the slip value of the motor based on the motor torque generated and raises the output
frequency to compensate for the decrease in motor rotation. This prevents the motor from decreasing the
rotation due to the slip. That is, this facility is effective for improving the motor speed control accuracy. The
compensation value is specified by combination of function codes P10 (Rated slip frequency), P07 (Slip
compensation gain for driving)) and P09 (Slip compensation gain for braking)
Function
Code
Mod.
Add.
Description Def Min Max U.M. R/W
F24 0x0018 Control mode Selection 1 0 0 2 - R/W
4.2.1
Output voltage & frequency setting
Output voltage & frequency of RVBS is determined by the parameters as follows:
-
Maximum frequency 1 (F03)
F03 specifies the maximum frequency (for motor 1) to limit the output frequency.
➢
Modifying F03 data to allow a higher reference frequency requires also changing F13 data specifying
a frequency limiter (high).
-
Base frequency 1 (F04)
Set the rated frequency printed on the nameplate labeled on the motor.