VBW

ASCII - Command

VBW

 

 

Syntax Transmit

VBW

 

Syntax Receive

VBW

Available in

 

Type

Command

MMI

No

ASCII Format

-

CANBus Object Number

No

DIM

-

PROFIBUS PNU

No

Range

0

DPR

No

Default

0

 

Opmode

0

Data Type Bus/DPR

-

Drive State

Enabled

Weightning

 

Start Firmware

2.44

 

Configuration

No

Revision

1.3

Function Group

Amplifier

EEPROM

-

Short Description

Generate Bode Diagram

Description

VBW [fmin] [fmax] [sample]

Velocity BandWidth

Using the function VBW the Drive calculates a velocity loop Bode plot. Default are 50 samples (sample) between 20 Hz (fmin) and 500 Hz (fmax). Output is the gain in db and the phase shift in degree of the open loop and the closed loop of the velocity controller. It is necessary to set GVFR to 1 to get the open loop result. Using MSG 2 the results are immediately shown. Standard is to query the data with the GET command. To use the function VBW the drive should be in OPMODE 0 and enabled. The shaft will move only a few degrees. In case of resonance load velocity overshoot can cause a Fault, which can result in an uncontrolled coasting of the motor.