Siemens SINAMICS S120 Function Manual page 542

Applications
11.3 Motor changeover
Figure 11-3
Table 11- 4
p0130
p0180
p0186[0...1]
p0820
p0821 to p0824 0
p0826[0...1]
p0827[0...1]
p0830.1 and p0830.2
p0831[0...1]
p0833.0..2
p2155
Procedure for star/delta changeover
1. Start condition:
2. Pulse inhibit:
542
Example: star/delta changeover
Settings for the example
Parameter
2
2
0, 1
p2197.2
0
0; 0
1, 2
Digital outputs, auxiliary
contactors
Digital inputs, auxiliary
contacts
0, 0, 0
Changeover speed
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.
The pulses are suppressed after a new drive data set is selected with p0820.
Settings
Configure 2 MDS.
Configure 2 DDS.
The MDS are assigned to the DDS.
Changeover to delta connection after speed in
p2155 is exceeded.
Identical numbers signify the same thermal
model.
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.
The digital outputs for the auxiliary contactors are
assigned to the bits.
The digital inputs for the feedback signal of the
motor contactors are assigned.
The drive controls the contactor circuit and pulse
inhibition. Parking bit (Gn_ZSW14) is set.
Sets the speed at which circuit is to be changed
over to delta.
Function Manual, (FH1), 10/2008, 6SL3097-2AB00-0BP5
Remark
Drive functions