Siemens S7-1200 System Manual page 484
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Also See for S7-1200:
- Operating instructions manual (132 pages) ,
- Programming manualline (74 pages) ,
- Manual (46 pages)
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Technology instructions
9.3 Motion control
Hardware limit switches
Hardware limit switches determine the maximum travel range of the axis. Hardware limit
switches are physical switching elements that must be connected to interrupt-capable inputs
of the CPU. Use only hardware limit switches that remain permanently switched after being
approached. This switching status may only be revoked after a return to the allowed travel
range.
Table 9- 57
When the hardware limit switches are approached, the axis brakes to a standstill at the
configured emergency deceleration. The specified emergency deceleration must be
sufficient to reliably stop the axis before the mechanical stop. The following diagram
presents the behavior of the axis after it approaches the hardware limit switches.
①
②
A
B
C
D
E
F
484
Available inputs for hardware limits
Description
Built-in I/O
SB I/O
The axis brakes to a standstill at the configured emergency deceleration.
Range in which the hardware limit switches signal the stats "approached".
[Velocity]
Allowed travel range
Distance
Mechanical stop
Lower hardware limit switch
Upper hardware limit switch
RPS
LIM-
I0.0 - I1.5
I4.0 - I4.3
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG
LIM+
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