Siemens SIMATIC S7-1200 - Page 722

Technology instructions
10.3 Motion control
S7-1200 Programmable controller
722 System Manual, V4.2, 09/2016, A5E02486680-AK
3. The "Input low HW limit switch" remains configured to I0.2 and edge detection on I0.2
remains activated:
Additional information
Your user program can override the hardware or software position limits by enabling or
disabling both hardware and software limits functionality. The selection is made from the
Axis DB.
● To enable or disable the hardware limit functionality, access the "Active" tag (Bool) in the
DB path "<axis name>/Config/
PositonLimits_HW
". The state of the "Active" tag enables
or disables the use of hardware position limits.
● To enable or disable software position limit functionality, access "Active" tag (Bool) in the
DB path "<axis name>/Config/
Position Limits_SW
". The state of this "Active" tag enables
or disables the software position limits.
You can also modify the software position limits with your user program (for example, to add
flexibility for machine setup or to shorten machine change-over time). Your user program can
write new values to the " MinPosition " and " MaxPosition " tags (engineering units in Real
format) in the DB "<axis name>/Config/
PositionLimits_SW
".