Siemens SINAUT ST7 System Manual page 69

maximum number of TIM modules is restricted by the number of connection resources of the
CP in the control center PC.
Connection to ST7cc / ST7sc over Ethernet
The following figure shows a configuration in which the TIM is connected to the PC over its
Ethernet interface. As of ST7cc V2.5 or ST7sc V1.1, the TIM can exchange data directly with
ST7cc/ST7sc over its Ethernet interface.
There are no special requirements of the CPU for this configuration. No SINAUT software is
necessary on the CPU for communication between the TIM and PC.
Since the Ethernet interface is occupied by the local communication with the PC, the
TIM 3V IE Advanced of the only provides the control center with one connection to a WAN in
this configuration.
● Over the RS-232 interface to a classic WAN
Figure 3-17
Even with this configuration, further TIM 3V-IE Advanced modules can be inserted in the
S7-300 rack. Each TIM can be connected to the PC over its Ethernet interface and provides
the PC with one connection to a WAN.
The other TIMs can also transfer their data to the first TIM over the backplane bus and use
the Ethernet interface of this TIM as a common access to the PC. In this case, each further
TIM provides the PC with two connections to the WAN. In this case, the maximum number of
TIM modules is not restricted by the connection resources of the CPU because they are not
required. The maximum number of TIM modules is restricted by the number of connection
resources of the CP in the control center PC.
SINAUT ST7 - Volume 1
System Manual, 11/2018, C79000-G8976-C178-12
Network structures, configuration examples, installation guidelines
SINAUT ST7cc / ST7sc control center system with a connection to a TIM 3V-IE
Advanced over Ethernet and classic WAN access.
3.3 Installation guidelines and compatible CPUs
69