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Installation guide
3.5 Standalone TIM 4 with an S7-400 or PC
Figure 3-22
Instead of the MDx SINAUT modem, other modems with an RS-232 or RS-485 interface can
also be used, for example wireless devices or the SINAUT GSM modem MD720-3. The RS-
485 interface of the TIM 4 also provides the option of connecting to a star-shaped dedicated
line network with several SINAUT MD2 or MD3 modems. You will find more information on
this topic in the section "Installation and commissioning of a SINAUT modem".
Apart from the SINAUT ST7cc or ST7sc control center system, a local controller, for example
an S7-400 can also be connected to MPI and exchange data with the stations in the
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.
118
SINAUT ST7cc / ST7sc control center systems with TIM 4 on MPI bus,
2 connections to WAN via MDx (1) and MDx (2) modems
SINAUT ST7 station control system
System Manual, 09/2016, C79000-G8976-C178-10
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