Siemens SINAMICS S120 Function Manual page 180

Vector control
4.22 Bypass
The bypass time, debypass time, bypass speed variables and the command source for
changing over are set using parameters.
The following signal diagram shows the timing when the bypass switch is on when activating
"bypass for fault".
Example
After activating the bypass function without synchronization (p1260 = 3) the following
parameters still have to be set:
Table 4- 11
p1262 =
p1263 =
p1264 =
p1265 =
p1266 =
p1267.0 =
p1267.1 =
p1267.2 =
P1269[0] =
P1269[1] =
p3800 = 1
p3802 = r1261.2
Function diagrams (see SINAMICS S120/S150 List Manual)
● 7020 Synchronization
180
The system reverts to converter mode when the setpoint (on the input of the ramp-
function generator, r1119) falls below the bypass speed threshold (p1265). The setpoint >
comparison value condition prevents the bypass from being reactivated straight away if
the actual speed is still above the bypass speed threshold (p1265) after switching back to
converter operations.
Parameter setting for bypass function with synchronization with overlap
Parameter
Bypass dead time setting
Debypass dead time setting
Bypass delay time setting
Speed threshold setting when p1267.1 = 1
Control signal setting when p1267.0 = 1
Trigger signal setting for bypass function
Signal source to provide the feedback signal of contactor K1
Signal source for contactor K2 feedback
The internal voltages are used for synchronization.
Synchronizer activation is triggered by the bypass function.
Function Manual, (FH1), 10/2008, 6SL3097-2AB00-0BP5
Description
Drive functions