Efficient Networks S120 manual Vdc control, Angular commutation offset commissioning support p1990

Servo control 3.14 Vdc control

Angular commutation offset commissioning support (p1990)

The function for determining the commutation angle offset is activated via p1990=1. The commutation angle offset is entered in p0431. This function can be used in the following cases:

●Single calibration of the pole position for encoders with absolute information (exception: The Hall sensor must always be mechanically adjusted.)

●Calibrating the zero mark position for fine synchronization

Table 3-15 Mode of operation of p0431

	Incremental without	Incremental with one	Incremental with distance-	EnDat absolute
	zero mark	zero mark	coded zero marks	encoder
C/D track	p0431	p0431	Currently not available	Not permitted
	shifts the commutation	shifts the commutation
	with respect to the C/D	with respect to the C/D
	track	track and zero mark
Hall sensor	p0431	p0431	p0431	Not permitted
	does not influence the	does not influence the	does not influence the Hall
	Hall sensor. The Hall	Hall sensor.	sensor.
	sensor must be	p0431	p0431
	mechanically adjusted.	shifts the commutation	shifts the commutation with
		with respect to the zero	respect to the absolute
		mark	position (after two zero marks
			have been passed)
Pole position	p0431	p0431	p0431	p0431
identification	no effect	shifts the commutation	shifts the commutation with	shifts the commutation
		with respect to the zero	respect to the absolute	with respect to the
		mark	position (after two zero marks	EnDat absolute
			have been passed)	position

Note

When fault F07414 occurs, p1990 is automatically started; if p1980 is not equal to 99 and p0301 does not refer to a catalog motor with an encoder that is adjusted in the factory.

3.14Vdc control

Description

Vdc control can be activated if overvoltage or undervoltage is present in the DC link line-up. In the line-up, one or more drives can be used to relieve the DC link. This prevents a fault from occurring due to the DC link voltage and ensures that the drives are always ready to use

This function is activated by means of the configuration parameter (p1240). It can be activated if an overvoltage or undervoltage is present. The torque limits of the motors at which the Vdc controller is active can be affected if discrepancies in the DC link voltage are

102	Drive Functions
	Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4