Technical data

SINAUT TD7 software package for the CPU
2.2 Principle of communication between SINAUT objects
Software
System Manual, 07/2009, C79000-G8976-C222-07
199
2.2 Principle of communication between SINAUT objects
Introduction
The term "object" within SINAUT ST7 refers to the type of display and handling of process
entities such as status information, analog values, commands, motors, valves, regulators,
etc. An object always consists of a process component and an operator control and
monitoring component that operate in separate PLCs (subscribers) of the SINAUT network
To perform their assigned functions, the tow components must be able to communicate with
one another. Setpoints, parameters, commands and organizational instructions are sent from
the operator end to the process object and the process object returns process data,
alarm/status messages, and organizational information.
In the TD7 world, at both the process end as well as the operator end, an object consists of a
processing instruction set - referred to below as a typical - in the form of an S7 function block
(FB) and an assigned object data record in the form of an instance DB for the FB. The
following figure shows the principle used for the exchange of data between the process and
operator components of an object.
Daten-Index 0
Daten-Index n
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Daten-Index 0
Daten-Index n
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Figure 2-19 The principle of object communication
Essentially, the data that describes an object is exchanged. This is located in the object data
record under data index 0...n. The extent and composition of this data area depends on the
typical. It can consist of several identical data types or a combination of different data types.
In the object data record at the process and operator ends, the data structure of two
corresponding typicals is identical.
The data exchange does not necessarily flow in both directions. There are simple objects in
which data transmission is one-way, for example, only process data is sent to the operator
component.
Organizational information is also exchanged between the two ends in addition to process
and operator data. This data flow and the data area reserved for this in the object data
record (the org. indexes) are not shown in the figure above.
Principle of object addressing
Every automation device with SINAUT TD7 software (generally simply referred to as a PLC
or CPU) is assigned a unique network-wide SINAUT subscriber number ranging from 1 to
32000. Every typical that is called in one of these CPUs has an instance DB whose number
is identical to the SINAUT object number. The use of the SINAUT subscriber number and the