Technical data
6.2 System behavior
TM15 / TM17 High Feature Operating Manual
Commissioning Manual, 05/2009
81
6.2.4 System behavior with outputs of output cam
The system behavior for outputs of output cam is shown in the figure below:
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6HUYR
2XWSXWRI
RXWSXW
FDP
6HUYR 6HUYR 6HUYR
72 72 72
7
7
21 2))
RXW
7
,32
7
RXW
7
21
7
2))
7
Figure 6-8 System behavior with outputs of output cams (call TO Output Cam and user program in
the IPO cycle clock)
In order to switch an output of an output cam in the shaded area of IPO #3, the Output Cam
technology object (TO) determines the switching positions in IPO #1. These switching
positions are converted in the following position control clock cycle to time stamp T
on
and T
off
and then transferred at the beginning of IPO #3.
The same system timing applies to the Output Cam Track technology object.
6.2.5 Interpolation
A linear interpolation is used to calculate the output cam switching points and for the
conversion of measuring input edges to axis positions. This can affect the accuracy in the
event of strong axis acceleration.
The time that elapses between the "state change on the terminal" and the "calculation in the
technology object" can be obtained from the timing diagrams.
See also
System timing for single measurement (Page 78)
System behavior with cyclic measurement (Page 79)
System behavior with outputs of output cam (Page 81)
6.2.6 System Behavior of TM15 DI/DO
The exact timing of TM15 DI/DO is described in the Motion Control Function Manual; basic
functions are described in chapter "Integration of drive I/O".
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