Application and functions
1.3 Communications services
CP 1243-8 IRC
Operating Instructions, 02/2018, C79000-G8976-C385-03
15
Security protocols
Simple communication via the mobile wireless network (GSM) and the Internet can be
achieved with the MSC transmission protocol. If the security requirements are higher, the
transmission protocols (OSI layer 3) listed below can be used.
●
MSC
Can be used with S7 communication
Simple Internet communication via the Internet (DSL)
The MSC protocol supports authentication of the communications partners and simple
encryption of data. A user name and a password are included in the encryption. An MSC
tunnel is established between the MSC station and MSC master station.
●
MSCsec
Can be used with S7 communication
Secure Internet communication using:
–
Internet (DSL)
or
–
Mobile wireless network (GSM) + Internet (DSL)
MSCsec supports authentication of the communications partners and data encryption
with a user name and password. In addition to this, the shared automatically generated
key is renewed between the communications partners at configurable intervals.
●
IPsec (VPN)
Highly secure communication via mobile wireless and the Internet (DSL).
Communication via a mobile wireless network combined with the Internet is made
possible by the router SCALANCE M. The SCALANCE M product series provides various
VPN routers with IPsec and encryption software and their own firewall.
For a description of the configurable Security functions, refer to the section Security
(Page 104).
You will find an overview of the possible transmission options in the section Overview:
Connection to LAN / WAN (Page 59).
DNP3
Communication is based on the DNP3 SPECIFICATION Version 2.x (2007/2009).
The CP is a communications processor of the SIMATIC S7-1200 for system connection to
control centers using the DNP3 protocol for telecontrol applications.
An S7-1200 with a CP functions as a DNP3 station (Outstation).
The CP supports implementation level 1 - 4 (DNP3 Application Layer protocol Level). You
will find a description of the other functions in the section Partners (DNP3 / IEC) (Page 91).
IEC 60870-5
The communication is based on the specification IEC 60870-5 Part 1 - 5 (1990 - 1995) and
Part 104 (2000).