Siemens SIMATIC ET 200SP Function Manual

Communication
8 Function Manual, 11/2019, A5E03735815-AH
Table of contents
Preface ...................................................................................................................................................... 3
1 Function manuals Documentation Guide ................................................................................................. 12
2 Product overview ..................................................................................................................................... 14
3 Communications services ........................................................................................................................ 19
3.1 Overview of communication options ...................................................................................... 19
3.2 Communications protocols and port numbers used for Ethernet communication ................. 22
3.3 Overview of connection resources ......................................................................................... 27
3.4 Setting up a connection ......................................................................................................... 27
3.5 Data consistency .................................................................................................................... 31
3.6 Secure Communication .......................................................................................................... 34
3.6.1 Basics of Secure Communication .......................................................................................... 34
3.6.2 Confidentiality through encryption.......................................................................................... 36
3.6.3 Authenticity and integrity through signatures ......................................................................... 39
3.6.4 Managing certificates with STEP 7 ........................................................................................ 43
3.6.5 Examples for the management of certificates. ....................................................................... 47
3.6.6 Example: HTTP over TLS ...................................................................................................... 53
3.7 SNMP ..................................................................................................................................... 57
3.7.1 Disabling SNMP ..................................................................................................................... 57
3.7.2 Example: Disabling SNMP for a CPU 1516-3 PN/DP ............................................................ 58
4 PG communication .................................................................................................................................. 60
5 HMI communication ................................................................................................................................. 63
6 Open User Communication ...................................................................................................................... 65
6.1 Overview of Open User Communication ............................................................................... 65
6.2 Protocols for Open User Communication .............................................................................. 66
6.3 Instructions for Open User Communication ........................................................................... 68
6.4 Open User Communication with addressing via domain names ........................................... 73
6.5 Setting up Open User Communication via TCP, ISO-on-TCP, UDP and ISO ...................... 75
6.6 Setting up communication over FDL ...................................................................................... 82
6.7 Setting up communication with Modbus TCP ........................................................................ 84
6.8 Setting up communication via e-mail ..................................................................................... 87
6.9 Setting up communication via FTP ........................................................................................ 88
6.10 Establishment and termination of communications relations ................................................. 91

Siemens SIMATIC ET 200SP Specifications

General

System Type	Distributed I/O System
Mounting	DIN Rail
Communication Protocol	PROFINET, PROFIBUS
IP Rating	IP20
Category	I/O Systems
Supply Voltage	24 V DC
Modularity	Yes
Hot Swapping	Yes
Storage Temperature	-40°C to +70°C
Digital Inputs	Yes
Digital Outputs	Yes
Analog Inputs	Yes
Analog Outputs	Yes
Communication Interface	PROFINET, PROFIBUS
Number of Modules	Up to 64
Relative Humidity	5 to 95% (non-condensing)
Operating Temperature	-25°C to +60°C