Siemens SINAUT ST7 System Manual page 130

Installation guide
3.8 Standalone TIM 4 with an S7-400 or PC
telecontrol network. This controller could, for example, be used to display data received from
the stations on a panel or console or for emergency input by an operator if ST7cc / ST7sc
failed. The controller could also handle central control tasks such as starting up the system.
SINAUT ST7cc / ST7sc and the central controller are then both supplied with parallel data.
Both can receive the same data or data specifically intended for one or the other. The
transfer of commands, setpoints, parameters etc. to the stations in the telecontrol network is
possible from both ST7cc / ST7sc and from the S7-400.
The following figure shows such a configuration with two WAN attachments.
Figure 3-23 SINAUT ST7cc / ST7sc control center systems and SIMATIC S7-400 with TIM 4 on MPI bus,
2 connections to WAN via MDx (1) and MDx (2) modems
Note
The S7-400 is not required as a primary telecontrol master for ST7cc / ST7sc! Both devices
are supplied directly with data by the TIM 4 independent of each other.
The maximum number of TIM 4 modules that can be connected to a SINAUT ST7cc / ST7sc
control center system depends on the MPI interface card used in ST7cc / ST7sc.
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System Manual, 07/2009, C79000-G8976-C178-07
Station control system