Name: Siemens SIMATIC S7-1200 CP 1243-8 IRC
Brand: Siemens
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Configuration

4.4 Basic communication mechanisms

CP 1243-8 IRC

Operating Instructions, 02/2018, C79000-G8976-C385-03

You will find information on the accessories in the following sections or literature sections:

● TS modules: TS modules (Page 193), /4/ (Page 226)

● Modems and routers: Modems and routers (Page 202)

– Modems: /5/ (Page 226), /6/ (Page 226), /7/ (Page 227), /8/ (Page 227)

– SCALANCE M812/M816: /9/ (Page 227)

– SCALANCE M874/M876: /10/ (Page 227)

● SCALANCE S: /12/ (Page 228)

● Connecting cables between TS Module RS232 and modems: Connecting cables for

connecting the modem of the TS Module RS232 (Page 210)

4.4

Basic communication mechanisms

4.4.1

Addressing, authentication, connections (single / redundant)

4.4.1.1

ST7

The ST7 protocol

Network types

ST7 is a protocol for telecontrol communication via WANs (Wide Area Network).

With ST7 it is possible to communicate via the following network types:

● Classic WAN networks

● IP-based WAN networks

Subscriber types

The following subscriber types that support the ST7 protocol are possible communications

partners:

● SIMATIC stations with TIM modules or a CP capable of ST7

● Control center applications capable of ST7

Connections

Communication with the ST7 protocol runs via configurable connections. You make the

required settings in the STEP 7 configuration.

Questions and Answers:

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Siemens SIMATIC S7-1200 CP 1243-8 IRC Specifications

General