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
Содержание SIMATIC ET 200SP
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