Siemens TIM 1531 IRC Operating Instructions Manual page 16

Application and functions
1.2 Communications services
Protocols with security functions
● MSC
For secure telecontrol communication the transmission protocol "MSC" (OSI layer 3) is
available. MSC can be used for communication between two TIM modules (not between
the TIM and a master station application).
MSC is IP-based and can be used in the following networks:
– Ethernet
– Internet (DSL)
– Mobile wireless network (GSM) and Internet
The following variants of the protocol are available:
– MSC
– MSCsec
● IPsec / VPN (via router SCALANCE M)
VPN stands fro highly secure communication via mobile wireless and the Internet (DSL)
using a SCALANCE M mobile wireless router.
For a description of the protocols, refer to the section Security functions (Page 18).
S7 communication
For reading / writing data from and to the local CPU via S7 connections, the following
services are supported.
● PG communication
Communication with an engineering station
● PG routing
S7 communication across subnetwork boundaries
● PUT/GET
To exchange data with a local S7-300/400 CPU the TIM supports communication using
the the program blocks PUT/GET as client and server.
● READ/WRITE
To exchange data with a local S7-1500 CPU the TIM supports communication using the
the program blocks READ/WRITE as client and server.
The Ethernet interfaces of the TIM must be configured with the network type "Neutral" for the
S7 communications services.
You will find information on the communications functions and the program blocks in the
STEP 7 information system.
16
Simple Internet communication via the Internet (DSL)
Secure Internet communication when security requirements are higher.
Operating Instructions, 02/2018, C79000-G8976-C468-02
TIM 1531 IRC