Extended Retract - Siemens SINAMICS S120 Function Manual

Function modules
8.11 Extended stop and retract
8.11.4.2

Extended retract

In the case of a fault, the objective is to approach a retraction position. The retraction method
is used as long as the drive is still capable of functioning. The function is parameterized and
operates on an axis-specific basis. Interpolating coupling of the axes is not realized.
Configuring the "Extended retract" response
1. The retract response is configured with the parameter setting p0888 = 2.
2. Define the retraction speed with parameter p0893.
3. Use parameter p0892 to specify how long the retraction speed is to be applied.
4. Select the OFF ramp with parameter p0891.
Figure 8-29
The retraction speed is not approached suddenly. It is approached via the OFF3 ramp.
Parameter p0893 supplies the ramp-function generator with the setpoint for the ESR
retraction speed which is actuated by an OFF3 ramp in the case of drive-autonomous
motions. The safety setpoint velocity limiting p1051/p1052 and the normal velocity limits
r1084/r1087 are active.
Figure 8-30
538
OFF ramp with "extended retract"
Connecting the setpoint channel to the ramp-function generator
Function Manual, (FH1), 04/2014, 6SL3097-4AB00-0BP4
Drive functions