Technical data

SINAUT TD7 software package for the CPU
2.2 Principle of communication between SINAUT objects
Software
202 System Manual, 07/2009, C79000-G8976-C222-07
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Figure 2-21 Object communication in the LAN (MPI)
In this configuration, the TD7 software could be used with its process and operator typicals
as shown in the diagram. In the subordinate PLCs, the process typicals handle local
automation and send data changes over the MPI bus to the operator objects in the central
control device, subscriber 13. The user controller reads the process information output to the
operator objects and processes it accordingly. If the current situation requires that
commands or setpoints are transferred to the process objects, these are entered by the user
controller over the appropriate inputs of the operator typicals. These handle the immediate
transmission to the process objects that take into account this information in their automation
task in keeping with the functions of the typical.
The process objects can not only send their data to their corresponding operator object in
subscriber 13 and receive control instructions from there. They can also send process
information to another partner, for example, a control center connected over a WAN, and, if
applicable, also receive commands and setpoints from there. The following section describes
how communication with more than one partner can be implemented.
Object communication with several operator subscribers
Apart from communication between one process typical and one operator typical, as in the
figure above, data can also be exchanged between the process typical and more than one
operator partner. The following figure illustrates the principle of such a configuration in which
an operator typical for the process object in subscriber 1 is intended for local subscriber 2