Effective Direction Of Cams; Fields Of Application; Application; Cam Track (To_Camtrack) - Siemens SIMATIC S7-1500 Manual

6 "Cam/Cam Track" Technology Object

6.3 Cam track (TO_CamTrack)

6.2.2

Effective direction of cams

The effective direction of the cam can be specified via the direction input of the
"MC_OutputCam" instruction. This means that the cam...

...is only switched in positive motion direction of the axis or the encoder and
not when the axis moves in negative direction.

...is only switched in negative motion direction of the axis or the encoder and
not when the axis moves in positive direction.

...is switched in both motion directions of the axis or the encoder.
6.2.3

Fields of application

The cam technology object is used for applications where the switching signals
have to be precisely output on certain axis positions.
The axis position of a virtual or real axis or the position of an external encoder can
be used as reference.
6.2.4

Application

This cam technology object, can be used, for example, for the following
applications:

Position accuracy when processing objects on a running material line.

Position accuracy when applying materials on products on a running material
line.

Output of a chronologically precise switching signal, depending on an axis or
encoder position.
6.3 Cam track (TO_CamTrack)
6.3.1

Instruction to influence a cam track

The output of up to 32 cams on a cam track can be influenced from the user
program with the following instruction:

"MC_CamTrack"
Via the enable button of the function the cam output can be enabled or
blocked. It can be preselected via the parameter mode whether the cam track
is to be enabled straight away or whether it should only be enabled or disabled
in the next track cycle. The switching output can also be switched on straight
away or switched off via the block.
6.3.2

Axis relationship of the cam track

The cam track generally always starts at position 0.000. This is why all of the
possible 32 cams of a cam track always have positive position values.
The connection of the cam track with a real axis can be made via the axis
reference position. The axis reference position leads to displays the entire cam
track in the coordinate system of the assigned axis or the assigned encoder.
Via the track length the end of the cam track, starting from position 0.000, can
additionally be specified.
TOs of S7-1500(T)
Entry ID: 109743134, V1.0, 05/2017
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