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Technical data
6.2 System behavior
6.2.2
System timing for single measurement
The system behavior for a single measurement is shown in the figure below:
Figure 6-6
If a measuring input event occurs in the shaded area in IPO cycle clock #1, then the actual
event time T
Measuring Input technology object (TO), T
available to the user program in IPO cycle clock #3.
The time-related behavior for single measurement depends on two parameters:
● The ratio between the IPO cycle time and the cycle time of the position control cycle clock
● The time level to which the Measuring Input technology object is assigned.
The following table shows the minimum sampling cycle.
The minimum sampling cycle defines the time between two measurements (e.g. the time
between detection of two print marks).
Table 6- 4
TO executed in IPO cycle clock
5 position control cycle clocks + 2 IPO cycle
clocks
Each sampling cycle is started by a measurement command from the technology object. The
TM15 and TM17 High Feature Terminal Modules are capable of sampling a maximum of two
edges within one sampling cycle.
78
System behavior for single measurement (call Measuring Input technology object and
user program in the IPO cycle clock)
is transferred at the beginning of the following IPO cycle clock. In the
event
(i.e. ratio of IPO to servo).
Minimum sampling cycle – Single measurement
is converted to a position value (POS) that is
event
TO executed in position control cycle clock
6 position control cycle clocks + 1 IPO cycle clock
TM15 / TM17 High Feature Operating Manual
Commissioning Manual, 05/2009
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