Siemens SINAMICS S120 Function Manual page 458

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 switchover
1. Start condition:
2. Pulse inhibit:
458
Example: star/delta switchover
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
Switchover 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.
After selecting a new drive data set using p0820, the pulses are inhibited.
Settings
Configure 2 MDS.
Configure 2 DDS.
The MDS are assigned to the DDS.
Switchover 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 checkback from the
motor contactors are assigned.
The drive is responsible for controlling the
contactor circuit and the pulse inhibit. Parking bit
(Gn_ZSW14) is set.
Sets the speed at which the switchover is to be
carried out in delta.
Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4
Comments
Drive Functions