Siemens SINAMICS S150 NEMA, Operating Instructions Manual, Page: 658 / 862

Functions, monitoring and protective functions
9.4 Extended functions
Enclosed Drives
656
Operating Instructions, 12/2018, A5E36652151A
Limiting the traversing range
The traversing range of a linear axis can be limited using either the software limit switch or
the hardware limit switch (STOP cams).
Figure 9-41 Software and hardware limit switches as limits
Activated software limit switches limit the position set value by specifying the connector input
p2578 (software limit switch, minus) and p2579 (software limit switch, plus).
Activated hardware limit switches are evaluated at the converter using binector inputs p2569
(STOP cams, minus) and p2570 (STOP cams, plus).
Limiting the traversing range using software limit switches
With this procedure, the position set value of a linear axis is limited in accordance with the
traversing range specified using the software limit switch.
The traversing range is only limited using software limit switches if the following
requirements are met:
● The software limit switches are activated (p2582 = 1).
● The reference point is set (r2684.11 = 1).
● Modulo correction is not active (p2577 = 0).
Limiting is realized via connector input p2578 (software limit switch, minus) and p2579
(software limit switch, plus). The connector inputs, in the factory setting, are linked to the
connector output p2580 (software limit switch, minus) and p2581 (software limit switch, plus).
Using parameters p2580 and p2581, you can set the required end positions of the software
limit switch.
Limiting the traversing range using hardware limit switches
When this procedure is used, the converter limits the traversing range of a linear axis using
hardware limit switches (STOP cams).
The traversing range is only limited using hardware limit switches if the following
requirements are met:
● The hardware limit switches are activated (p2568 = 1).
The signals of the hardware limit switches are evaluated using the digital outputs of the
converter. There are two methods available for evaluating hardware limit switches:
● Edge-triggered evaluation (factory setting)
● Level-triggered evaluation
For limiting the traversing range using a hardware limit switch, edge-triggered evaluation has
been configured as a factory setting. The signals are evaluated using binector inputs p2569
(hardware limit switch, minus) and p2570 (hardware limit switch, plus). Hardware limit