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WAN
Figure 3-22
In the configuration shown above the TIM 4 provides access to the WAN for both the S7-400
and the S7-300. This could, for example, be a large station in which the automation tasks are
distributed to several PLCs.
S7-400 with maximum configuration
The maximum number of TIMs that can be connected to an S7-400 over MPI depends on
the connection resources provided by the CPU. With an S7-400, one (1) connection
resource is required per TIM. However, the available work memory of the CPU must also be
taken into account; the more TIMs installed and stations connected, and the more objects
processed per station, the greater the memory demands of the telecontrol-specific user
program on the central CPU. This program is put together with blocks from the SINAUT TD7
software package (TD7onCPU).
Example of configurations with the SINAUT ST7cc or ST7sc control center systems
The SINAUT ST7cc control center system based on WinCC or the SCADA Connect
Software SINAUT ST7sc is connected to the SINAUT telecontrol network just as with an S7-
400 over one or more TIM 4 modules. These TIMs are connected to the MPI adapter of the
SINAUT ST7cc / ST7sc system over their MPI interface. The inclusion of a telecontrol
master, for example an S7-400 is not necessary. Data exchange with the stations is handled
by the master TIM 4 modules.
The following figure shows the simplest configuration for a SINAUT ST7cc or ST7sc control
center system with one (1) connection to a WAN.
SINAUT ST7 Station control system - System Manual
System Manual, 05/2007, C79000-G8976-C178-06
SIMATIC S7-400 and S7-300 with TIM 4 on MPI bus,
1 connection to WAN (1) over integrated modem
3.8 Standalone TIM 4 with an S7-400 or PC
Installation guide
143
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