Efficient Networks S120 manual Procedure for star/delta switchover, Parameter Settings Comments

Applications

11.3 Motor changeover

U

U

U

.+ .+

S>@

.

S>@.

					.		.
				.	.
					.+		.+
	8			8	.		.
	9			9
	:			:
Figure 11-3 Example: star/delta switchover
Table 11-4 Settings for the example
Parameter			Settings					Comments
p0130		2				Configure 2 MDS.
p0180		2				Configure 2 DDS.
p0186[0..1]		0, 1				The MDS are assigned to the DDS.
p0820		p2197.2				Switchover to delta connection after speed in
p0821 to p0824 0		0				p2155 is exceeded.
p0826[0..1]		0; 0				Identical numbers signify the same thermal
						model.
p0827[0..1]		1, 2				Assign the bit from p0830 to the MDS. If
						p0827[0] = 1, for example, bit p0830.1 is set when
						MDS0 is selected via DDS0.
p0830.1 and p0830.2		Digital outputs auxiliary				The digital outputs for the auxiliary contactors are
		contactors				assigned to the bits.
p0831[0..1]		Digital inputs auxiliary				The digital inputs for the checkback from the
		contacts				motor contactors are assigned.
p0833.0..2		0, 0, 0				The drive is responsible for controlling the
						contactor circuit and the pulse inhibit. Parking bit
						(Gn_ZSW14) is set.
p2155		Switchover speed				Sets the speed at which the switchover is to be
						carried out in delta.

Procedure for star/delta switchover

1.Start condition:

For synchronous motors, the actual speed must be lower than the star field weakening speed. This prevents the regenerative voltage from exceeding the terminal voltage.

2.Pulse inhibit:

After selecting a new drive data set using p0820, the pulses are inhibited.

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