Siemens SINAMICS S120 Function Manual page 176

Vector control
4.22 Bypass
Example
The following parameters must be set after the bypass function with synchronization with
overlap (p1260 = 1) has been activated.
Table 4- 9
p1266 =
p1267.0 = 1
p1267.1 = 0
P1269[0] =
P1269[1] =
p3800 = 1
p3802 = r1261.2
Figure 4-29 Signal diagram, bypass with synchronization with overlap
The motor is transferred to the line supply
(the drive converter controls contactors K1 and K2):
● The initial state is as follows: Contactor K1 is closed, contactor K2 is open and the motor
● The control bit "bypass command" (p1266) is set (e.g. from the higher-level automation).
● The bypass function sets the control word bit "synchronizing" (r1261.2).
● Since the bit is set while the converter is running, the "Transfer motor to supply"
176
Parameter setting for bypass function with synchronization with overlap
Parameter
is fed from the drive converter.
synchronization process is started.
Control signal setting when p1267.0 = 1
Bypass function is initiated by the control signal
Signal source to provide the feedback signal of contactor K1
Signal source for contactor K2 feedback
For synchronization, the internal voltages are used.
Synchronizer activation is triggered by the bypass function.
Function Manual, (FH1), 10/2008, 6SL3097-2AB00-0BP5
Description
Drive functions