Siemens TIA Portal V14 - Cam;Cam Track Technology Object; 6.1 General information; 6.1.1 Distance output cams (position-based)

6 "Cam/Cam Track” Technology Object
6.1 General information
TOs of S7-1500(T)
Entry ID: 109743134, V1.0, 05/2017
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 Siemens AG 2017 All rights reserved
6 "Cam/Cam Track” Technology Object
6.1 General information
The cam or cam track technology object is used for the highly precise output of
switching signals, depending on the position of an axis or an encoder.
For the output of switching signals it can be differentiated between the following
two cam types:
 Distance output cams (position-based cams)
 Time-based cams
Note
Within a "cam" or "cam track" technology object, only one cam type each can be
used that has to be specified during the configuration of the technology object.
However, several technology objects can be interconnected on the same axis or
the same encoder.
6.1.1 Distance output cams (position-based cams)
For a distance output cam, the start and the end position of the cam is specified
absolute in relation to the interconnected axis. Here, it can be basically
differentiated between the setpoint and actual position of the axis.
Figure 6-1 Distance output cams
A distance output (position-based) cam can be switched on depending on the
direction, either only in forward direction, only in backward direction or in both
directions. If the axis position is located within the start and end position of the
defined cam and if the direction condition is met, the cam is switched on. Otherwise
the cam is switched off.
Figure 6-2 Direction-dependency of distance output (position-based) cams
Movement in positive direction Movement in negative direction
Path
100 110 1209080
Path
100 110 1209080
Start position End position Start position End position
Rising
edge
Rising
edge
Falling
edge
Falling
edge
+ -