Siemens 6RA70 specifications Closed-loop field current control, field gating unit, 10-36

	PNU		Description				Value range		No. indices		See
							[Unit]		Factory		Change
							Steps		setting		(Access /
									Type		Status)
	P229		Control of I component tracking for slave drive				0 to 1	Ind: 4		P052 = 3
*		0		On a slave drive, the I component of the speed controller is		1		FS=0		P051 = 40
	FDS							Type: O2		Offline
				made to follow such that M(set, ncontr.) = M(set, limit),
	(G152)			the speed setpoint is set to the actual speed value
		1		Tracking deactivated
	P230		Setting period of speed controller integrator		[SW 1.9 and later]		0 to 10000		Ind: 4		P052 = 3
			After a positive edge at the binector set in P695, the integrator of the speed				[ms]		FS=0		P051 = 40
	FDS						1ms		Type: O2		on-line
			controller is set to the instantaneous value of the connector set in P631.
	(G152)		If a time of > 0 is set on P230, this setting operation is not performed just
			once, but the speed controller integrator is set continually to the setting
			value for the parameterized time period.
	P234		Set speed controller P component to zero				0 to 1	Ind: 4		P052 = 3
*		0		Set controller P component to zero (i.e. to obtain a pure I		1		FS=1		P051 = 40
	FDS							Type: O2		Offline
				controller)
	(G152)
		1		Controller P component is active
	P236		Specifying the dynamic response of the speed control loop				10 to 100		Ind: 4		P052 = 3
*					[SW 2.0 and later]	[%]			FS=75		P051 = 40
	FDS		The parameter value is used as the optimization criterion for the speed			1			Type: O2		online
			control loop.
			Note:
			Changes to this value do not take effect until the speed controller
			optimization run (P051 = 26, see Section 7.5) has been executed.
			Setting instructions:
		-		For drives, for example, with gear backlash, optimization should be
				started with low dynamic response values (from 10%).
		-		For drives with top synchronism and dynamic response requirements,
				values up to 100% should be used.

10.12 Closed-loop field current control, field gating unit

P250	Alpha G limit (field)		0 to 180		Ind: 4	P052	= 3
FDS	Rectifier stability limit for firing angle of field converter		[degrees]		FS=0	P051	= 40
(G166)			1 degree		Type: O2	Online
P251	Alpha W limit (field)		0 to 180		Ind: 4	P052	= 3
FDS	Inverter stability limit for firing angle of field converter		[degrees]		FS=180	P051	= 40
(G166)			1 degree		Type: O2	Online
P252	Filtering of line frequency correction (field)		0 to 200		Ind: 4	P052	= 3
*	The internal line synchronization for the field gating pulses derived from the		[ms]		FS=200	P051	= 40
FDS			1ms		Type: O2	Offline
	field mains infeed terminals is filtered with this time constant. In operation
(G166)	on "weak" power supplies with unstable frequencies, for example, on a
	diesel-driven generator (isolated operation), the filter time constant must be
	set lower than for operation on "constant V/Hz" systems in order to achieve
	a higher frequency correction speed.
	Using the units position, the line synchronization function can be altered
	additionally as follows:
	When the parameter is set to an uneven number, the measured line zero
	crossings for line synchronization are subjected to an extra "filter", may
	improve performance in the case of difficulties with brief mains interruptions
	(e.g. power supply via sliding current collectors), but may only be set for
	constant V/Hz power supplies (not for weak isolated supply systems).
P253	Control word for field precontrol		0 to 1		Ind: 4	P052	= 3
*	0	Field precontrol disabled, precontrol output = 180°	1		FS=1	P051	= 40
FDS					Type: O2	Offline
	1	Field precontrol active, output is dependent on field current
(G166)
		setpoint, field line voltage, P112
P254	Set field current 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)
(G166)
	1	Controller I component is active
P255	Field current controller P gain		0.01 to 100.00		Ind: 4	P052	= 3
FDS	This parameter is set automatically during the optimization run for precontrol		0.01		FS=5.00	P051	= 40
(G166)	and current controller (armature and field) (P051=25).				Type: O2	Online
10-36				SIEMENS Energy & Automation
		SIMOREG DC Master Base Drive Panel Operating Instructions