102BTechnology instructions
9.3 Basic motion control
S7-1200 Programmable controller
370
System Manual, 11/2011, A5E02486680-05
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①
The axis brakes to a standstill at the configured deceleration.
A
[Velocity]
B
Working range
C
Distance
D
Lower software limit switch
E
Upper software limit switch
Use additional hardware limit switches if a mechanical endstop is located after the software
limit switches and there is a risk of mechanical damage.
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".