Siemens SIMATIC S7-1500 Manual page 53

8 Example Application
8.5 Operating the application example
Table 8-9 Operating options and display on the web page
No.
1.
2.
3.
4.
5.
6.
7.
Particularities of the simulation
In order to be able to monitor the individual process steps on the technology
objects without restrictions, the simulation has no restrictions or blocks in the
operation.
If new products are, for example, requested in intervals that are too short, it may
happed that the sealing unit is still processing the previous product and can
therefore not carry out a synchronization on the currently requested product.
The product that follows at a short distance is detected by the measuring input and
entered in the data logger. However, processing the product is only possible by
applying the material, because this can be done fast enough to all products, due to
the distance of the measuring input.
The synchronization position of the non-processed product is calculated correctly
within the program. However, the appropriate motion of the sealing unit will only
take place after the modulo jump of the conveyor belt axis when the calculated
position passes the sealing unit again.
This behavior of the simulation is noticeable on the pointers of the data logger, as
long as no new products are requested. If both pointers do not point to the same
memory cell, after the product has fully passed through the machine, this means
the sealing process could not be carried out, i.e. the sealing unit could not be
synchronized.
TOs of S7-1500(T)
Entry ID: 109743134, V1.0,
Speed of the conveyor belt
Display of the current speed of the conveyor belt.
Speed of the sealing unit
Display of the current speed of the sealing unit The synchronism of the sealing
unit to the product passing through can be monitored via the pointer position that
displays the conveyor speed.
Data logger of the measuring input
Ring buffer of the data logger in which the positions of the detected products on
conveyor belt can be entered by the measuring input.
Write pointer of the measuring input
The display selects the memory cell of the data logger in which the next position
detected by the measuring input is entered.
Read pointer of the sealing unit
The display selects the memory cell of the data logger from which the measured
value of the currently processed product is read. When the sealing process is
completed, the read pointer is moved ahead by one memory cell.
For reasons of clarity there is no display of the read pointer for the application of
the material.
Current position of the conveyor belt
This is where the current position of the conveyor belt output by the technology
object is displayed.
This axis is a modulo axis. For this reason the display of the axis position is
within a range of 0,000 to 500,000.
Current position of the sealing unit
This is where the currently position of the sealing unit, output by the technology
object is displayed.
This axis is a modulo axis. For this reason the display of the axis position is
within a range of 0,000 to 110,000.
05/2017
Display
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