Siemens SINAMICS G120P, Operating Instructions Manual

Page: 416 / 496

Functions
7.7 Application-specific functions
Inverter cabinet units
416
Operating Instructions, 12/2014, A5E32923362A
Switch off motor in bypass mode
● In bypass mode the motor no longer responds to the OFF1 command, but rather only to
OFF2 and OFF3.
● If you cut off power to the inverter in bypass mode, the bypass contactor opens and the
motor coasts down. If you want to operate the motor even when the inverter is switched
off, the signal for the bypass contactor must come from the higher-level controller.
Temperature monitoring and overload protection in bypass mode
● If the motor is running in bypass mode, while the inverter is in the "ready and bypass"
state (r899.0 = 1 and r0046.25 = 1), then the motor temperature monitoring via the
temperature sensor is active.
● Install the overload protection for the motor bypass mode.
Parameters for setting the bypass function
Parameter Description
p1260 Bypass configuration
Activate the bypass function.
r1261 Bypass control/status word
Control and feedback signals for the bypass function.
p1262 Bypass dead time
Switchover time for contactors. This should be longer than the motor's de-magnetizing
time!
p1263 Debypass delay time
Delay time for switching back to inverter operation.
p1264 Bypass delay time
Delay time for switching to bypass mode.
p1265 Bypass speed threshold
Speed threshold for switching to bypass mode.
p1266 Bypass control command
Signal source for switching to bypass mode.
p1267 Bypass switchover source configuration
Switch to bypass mode using speed threshold or control signal.
p1269 Bypass switch feedback
Signal source for contactor feedback for bypass mode.
p1274 Bypass switch monitoring time
Monitoring time setting for bypass contactors.
For more information, refer to the parameter descriptions and the function block diagram
7035 in the List Manual.