Siemens SIMATIC FM 452, Manual

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Machine Data and Cam Data
8-26
FM 452 Electronic Cam Controller
C79000-G7076-C452-04
8.9 Cam Data
Definition
Cam data describe the characteristics of a cam, the assignment of each cam to a
track, and the switching behavior of the cam. The cam data listed below are set for
each individual cam.
•
Only the cams you set as “true” will be interpreted and processed by the
module.
•
Cams 0 to 7 have process interrupt capability.
•
The number of cams that can be set depends the number available.
Switching Response of Cams Dependent on the Activation Direction
With the exception of example 5, the positive activation direction is assumed.
No. Description Distance cam Time cam
1
A cam is passed in the
activation direction
CS
CE CS
On time
activation direction
2
A cam is passed in the
direction opposite to the
CS CE CS
On time
direction o osite to the
activation direction
3
A cam is approached in the
activation direction; while
the cam is active, the
direction of the axis is
CS CE CS
x
On time
t1
direction of the axis is
changed.
On time x = t1 + t2
t2
t1
4
A cam is approached in the
direction opposite to the
activation direction; the
CS CE Cam not switched
activation direction the
direction of travel of the axis
changes to the activation
direction at the cam