GVFBT

ASCII - Command	GVFBT
Syntax Transmit	GVFBT [Data]
Syntax Receive	GVFBT <Data>	Available in
Type	Variable rw	MMI	Yes
ASCII Format	Float	CANBus Object Number	3549 (hex)
DIM	Milliseconds	PROFIBUS PNU	1673 (dec) IND = 0000xxxx (bin)
Range	0.0 .. 30.0	DPR	73 (dec)
Default	0.4
Opmode	0, 1	Data Type Bus/DPR	Integer32
Drive State	-	Weightning	1000
Start Firmware	1.20
Configuration	No	Revision	1.8
Function Group	Velocity Controller	EEPROM	Yes
Short Description	Velocity Control Loop: Time Constant First Order Tacho Filter

Description

If necessary, the time constant for the PT-1 filter in the actual velocity feedback is altered (default=0.6 ms). This may improve the step response and smoothness of running, particularly for very small, highly dynamic motors. If the GVFBT value is set too low, the motor runs roughly. If the GVFBT value is set too high, the velocity control becomes soft and unstable.