Travel To Fixed Stop - Siemens SINAMICS G120D Operating Instructions Manual

7.6.9.1

Travel to fixed stop

Preconditions
The "Travel to fixed stop" function is only possible with the control type vector control with
encoder (VC):
"Travel to fixed stop" is not possible with the following types of control:
● V/f control
● Vector control without encoder (SLVC)
Description
With this function, the converter positions a machine part to another machine part with force
locking – and presses both machine parts together with an adjustable force.
Examples:
1. A door is pressed against a frame so that it is reliably closed.
2. A rotary table is pressed against a mechanical fixed stop, in order to secure a specific
alignment.
When traveling to a fixed stop, the
following applies:
• You must specify the position
setpoint far enough behind the
mechanical fixed stop. The load
must reach the mechanical fixed
stop before the converter brakes
the axis.
• If the start of braking point is located in front of the mechanical fixed stop, the converter
cancels the travel and outputs fault F07485.
• Before starting the travel, the converter calculates the traversing profile for accelerating
and braking the axis. The selected torque limit for the fixed stop has no influence on this
calculation. However, the torque limit for the fixed stop reduces the available drive torque
for the complete traversing distance. If the torque available for the predicted acceleration
is not sufficient, then the following error is higher.
If the following error monitoring for travel to fixed stop responds, then you must reduce
the acceleration override.
Converter with control units CU250D-2
Operating Instructions, 04/2015, FW V4.7.3, A5E34261542B AB
Advanced commissioning
7.6 Basic positioner and position control
213