Siemens SIMATIC S7-400H Manual page 18

S7-400H Installation Options
Figure 2-1 shows an example of the configuration of an S7-400H with common
distributed I/O and a connection to a redundant system bus. On the next few
pages we will describe step by step the hardware and software components
necessary for configuring and operating the S7-400H.
redundant PROFIBUS-DP
Figure 2-1
Further information
The components of the S7-400 standard system are also used in the fault-tolerant
S7-400H programmable logic controller. A detailed description of all the hardware
components of the S7-400 and S7-400H may be found in the Reference Manual
S7-400, M7-400 Programmable Controllers, Module Specifications .
The same rules as for a standard S7-400 system apply to designing the user
program and the usage of blocks for the fault-tolerant S7-400H programmable
logic controller. Please take note of the descriptions in the Programming with
STEP 7 manual and in the System Software for S7-300/400, System and Standard
Functions Reference Manual.
2-2
Operator station
(system visualization)
redundant system bus (PROFIBUS or Ethernet)
S7-400H PLC
Overview
S7-400H Programmable Controller Fault-Tolerant Systems
ET 200M distributed I/O
ET 200M distributed I/O
A5E00068197-04