Range Limits (Software Limit Switches) - Siemens SIMATIC S5 Manual

Machine Data and their Structure
Note
I
From now on, in the representation of traversing movements in the speed/time
or speed/distance diagram a linear frequency increase will be used instead of
the exponential increase, to help simplify the representation.
the traversing frequency f. is reduced for the positioning job until it is certain that the positioning
job not only includes the acceleration and deceleration ramp but also a section to be traversed
at a constant speed.
2.5.3.8

Range Limits (Software Limit Switches)

Ail distances are specified in the dimensional unit selected in the "measurement system" parame-
ter. The traversing range is characterized by the following:
the start of the traversing range (software start limit switch), X
the end of the traversing range (software end limit switch), X
For a linear axis, the start of the traversing range is the software start limit switch, the end is the
software end limit switch. Targets can only be approached within this range. If a software limit
switch is tripped during operation, the axis is braked.
The following must apply: XA <
For a rotary axis, the traversing range must be a whole multiple of the value
pulses/revolutions . positioning r=olmion
to ensure that the reference point is reproducible.
2 - 1 8
X
E
A
E