Siemens 6RA70 specifications Closed-loop EMF control, 10-38

PNU	Description	Value range	No. indices	See
		[Unit]	Factory	Change
		Steps	setting	(Access /
			Type	Status)

10.13 Closed-loop EMF control

P272	Operating mode of closed-loop EMF control			0 to 1		Ind: None	P052	= 3
*	0	Fault message F043 (”EMF too high for braking operation") is		1		FS=0	P051	= 40
						Type: O2	Offline
(G165)		active: If the EMF is too high when a torque direction change is
		requested (i.e. if the calculated firing angle (K0101) for the
		armature current in the new torque direction is > 165 degrees),
		both torque directions are disabled. If, at the same time, the
		absolute value of the armature current required in the new
		torque direction is > 0.5% of rated converter DC current (P072),
		fault message F043 is activated (see Section 10 for possible
		fault causes).
	1	Alarm A043 and automatic field reduction if EMF is too high in
		braking operation.
		If the EMF is too high in braking operation (i.e. if the following
		applies to the armature firing angle α before limitation (K0101):
		α > (αW – 5 degrees)), alarm A043 is activated (αW is the
		inverter stability limit according to P151 or 165 degrees with a
		discontinuous armature current).
		The field is reduced with activation of A043. This field reduction
		is achieved by regulating the armature firing angle to (αW – 5
		degrees) by means of a P controller, whose output reduces the
		EMF controller setpoint. "Field weakening operation by internal
		closed-loop EMF control" (P081=1) must therefore be
		parameterized so that the field reduction can take effect.
		When a torque direction change is requested, both torque
		directions remain disabled until the field, and thus the EMF,
		have been reduced accordingly (i.e. until the calculated firing
		angle (K0101) for the armature current required in the new
		torque direction is <165 degrees).
P273	Control word for EMF controller precontrol			0 to 1		Ind: 4	P052	= 3
*	0	EMF controller precontrol disabled, precontrol output = rated		1		FS=1	P051	= 40
FDS						Type: O2	Offline
		motor field current (P102)
(G165)
	1	EMF controller precontrol is active
P274	Set EMF controller I component to zero			0 to 1		Ind: 4	P052	= 3
*	0	Set controller I component to zero (i.e. to obtain pure P		1		FS=1	P051	= 40
FDS						Type: O2	Offline
		controller)
(G165)
	1	Controller I component is active
P275	EMF controller P gain			0.10 to 100.00		Ind: 4	P052	= 3
*	This parameter is automatically set during the field weakening optimization			0.01		FS=0.60	P051	= 40
FDS						Type: O2	Online
	run (P051=27).
(G165)
P276	EMF controller reset time			0.010 to 10.000		Ind: 4	P052	= 3
*	This parameter is automatically set during the field weakening optimization			[s]		FS=0.200	P051	= 40
FDS				0.001s		Type: O2	Online
	run (P051=27).
(G165)
P277	EMF controller droop			0.0 to 10.0		Ind: 4	P052	= 3
*				[%]		FS=0.0	P051	= 40
FDS				0.1%		Type: O2	Online
(G165)
P280	Filter time for setpoint for EMF controller precontrol		[SW 1.9 and later]	0 to 10000		Ind: 4	P052	= 3
	Filtering of the EMF setpoint at the input of the EMF controller precontrol.			[ms]		FS=0	P051	= 40
FDS				1ms		Type: O2	on-line
	The purpose of this filter is to decouple the EMF controller precontrol from
(G165)
	the EMF controller.
P281	Filter time for setpoint for EMF controller		[SW 1.9 and later]	0 to 10000		Ind: 4	P052	= 3
	Filtering of the EMF setpoint at the input of the EMF controller.			[ms]		FS=0	P051	= 40
FDS				1ms		Type: O2	on-line
	The purpose of this filter is to decouple the EMF controller precontrol from
(G165)
	the EMF controller.
P282	Filter time for actual value for EMF controller		[SW 1.9 and later]	0 to 10000		Ind: 4	P052	= 3
FDS	Filtering of actual EMF value at the input of the EMF controller.			[ms]		FS=0	P051	= 40
				1ms		Type: O2	on-line
(G165)
P283	Filter time for actual value for EMF controller precontrol			0 to 10000		Ind: 4	P052	= 3
			[SW 1.9 and later]	[ms]		FS=0	P051	= 40
FDS	Filtering of actual speed value at the input of the EMF controller precontrol.			1ms		Type: O2	on-line
(G165)
	The purpose of this filter is to stabilize the EMF controller precontrol, even
	when the actual speed signal is unsteady or distorted by harmonics.
10-38					SIEMENS Energy & Automation
			SIMOREG DC Master Base Drive Panel Operating Instructions