8.2 Technology objects used
TOs of S7-1500(T)
Entry ID: 109743134, V1.0, 05/2017
Siemens AG 2017 All rights reserved
makes it possible to operate individual processing stations of the example
application independent from each other.
The processing stations of the sealing unit and for applying the material, then only
monitor the data logger. If a new value is entered there by the measuring input, a
new product was detected and the start positions for the two other processing
stations can be calculated internally and the processing jobs can be started on the
individual stations.
Figure 8-2 Basic realization of the example application
Product detection
on product belt
+ Distance 2
Distance 1
Distance 2
Processing
position 1
Processing
position 2
+ Distance 1
8.2 Technology objects used
8.2.1 Positioning axis (TO_PositioningAxis)
The positioning axis technology object moves the product within the production
process, by driving the conveyor belt, on which the products are located during
production.
The positioning axis technology object was selected for the conveyor belt since a
position value with the current position of the product is necessary for the further
production process, in order to be able to carry out further production steps.
Although it would also be possible to specify a motion for the conveyor belt via
the (TO_SpeedAxis), this is only possible via a speed value for the belt. A
position value is not available for this type of technology object and can therefore
also not be used, for example, for a position measurement of the tools via the
measuring input.
The positioning axis technology object was configured as modulo axis, in order to
prevent overflows of the position value for continuous production. The modulo
length set for the modulo axis was dimensioned in a way that there is a unique
position value for each product on the conveyor belt.
8.2.2 Measuring input (TO_MeasuringInput)
Via the measuring input technology object the products placed on the conveyor are
measured and their position is precisely detected.
The position value detected of the product on the conveyor belt can be processed
as follows in the further production process:
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