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
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PartnerObjectNo = 15 (number of the corresponding object on this partner)
In the other direction the partner address for object 15 is as follows:
PartnerNo = 1 (subscriber number of the process partner)
PartnerObjectNo = 5 (number of the corresponding object on this partner)
When object 5 wants to transmit data to its partner object 15, a data message is put together
in which the specified two-level partner address is entered as the destination address. Based
on the destination subscriber 4 (= PartnerNo), the SINAUT TD7 software and the TIM
modules in the SINAUT network make sure that this message is delivered to the specified
destination subscriber 4.
When the message arrives at destination subscriber 4, the TD7 software reads the
destination object number 15 (= PartnerObjectNo) contained in the message and recognizes
that the information in the message should be stored in the local DB15. The index number
contained in the message is also taken into account when selecting the storage location. If,
for example, the index number is X, the information is stored in DB15 starting at data index
X. Information is also entered in the object DB indicating that new data has arrived and
identifying the data indexes that have been updated. In the following program cycle, the
operator typical that processes this object detects the reception of new data, processes it
according to the typical function and applies it to the data outputs configured for the typical.
In the opposite direction, operator object 15 sends its data intended for process object 5 in a
message containing subscriber no. 1 and object no. 5 as the destination address. This
message finally arrives at subscriber no. 1 directed by the TD7 software and TIMs. The
information contained in the message is entered in the appropriate location in object DB 5,
once again based on the destination object no. 5 and the data index. In the following
program cycle, the process typical processes the newly received data and makes it available
to the configured outputs in an appropriate form.
Object communication over LAN
In addition to data transmission between SINAUT objects over a WAN, the SINAUT TD7
software also allows local communication over LANs (the current software presently
supports only the MPI bus as a LAN).
The following figure assumes an installation structure in which several PLCs are planned in
one station. Each PLC handles a particular automation task (in the example, subscribers 10,
11 and 12). This station also includes a further higher-level PLC (subscriber 13) in which a
user controller is incorporated that controls the automation in the subordinate PLCs.