This catalog is out of date, see note on page 2
Summary
The bus system can be designed in redundant form if extremely high demands are placed on the availability. This does not result in additional configuring requirements.
Events are always recorded with the exact time since the indi- vidual bus participants can synchronize their clocks via the bus system.
The simple configuring is one of the most important characteris- tics of the CS 275 bus system. Convenient system functions are used to establish the connection, intervention by the operator is not required. The parameters to be transmitted (analog/binary values, messages etc.) are already declared when configuring the automation systems and the operation and monitoring sys- tems. The establishment of the connection for the operation and monitoring systems is carried out automatically when starting up, it is merely necessary to enter a coupling command for con- nections between automation systems.
Optimum utilization of the high performance of the CS 275 bus system is only guaranteed with a large number of participants if certain rules are observed when configuring the bus and if it is ensured that the cyclic bus loading does not exceed 70 % of the bus capacity. Thus 30 % are available for acyclic data transfer (e. g. messages).
In the case of a specific configuration, the cyclic bus loading is independent of
xthe configuration of the transmitter blocks in the automation systems,
xthe transmission mode selected and
xthe processing cycle of the transmitter blocks.
Information on the establishment of data transfer with the cou- pling blocks for data exchange via the CS 275 bus system is included in the publication ”Configuring guidelines” in the Manual ”CS 275 bus system”. This publication describes the determination of the cyclic bus loading using the bus loading characteristics and lists the cyclic bus loading for a selected configuration.
Siemens PLT 130 . 1994 | 1/3 |
