Traversing Range Limitation; Brief Description; Hardware Limit Switches - Siemens SIMATIC S7-1500 Function Manual
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3.17
Traversing range limitation
3.17.1
Brief description
Hardware and software limit switches limit the permissible traversing range and operating
range of the positioning axis/synchronous axis. Before use, they must be enabled in the
configuration or in the user program.
The following figure shows the relationship between operating range, maximum traversing
range and the limit switches:
3.17.2
Hardware limit switches
Hardware limit switches are limit position switches that limit the maximum permissible
traversing range of the axis.
Select the positions of the hardware limit switches so that there is adequate braking distance
for the axis when needed. The axis should come to a standstill before a mechanical endstop.
Approaching the hardware limit switches
In the monitoring of range limitation, no distinction is made, whether the switches are
approached or overshot.
If a hardware limit switch is approached, technology alarm 531 is output, and the technology
object is disabled (alarm response: remove enable).
Exception
If the hardware limit switches are used as reversing cams or reference cams, then the
monitoring of the hardware limit switches has no effect.
S7-1500 Motion Control V13 Update 3
Function Manual, 07/2014, A5E03879256-AC
3.17 Traversing range limitation
Basics
65
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