Table of contents
Communication
Function Manual, 05/2021, A5E03735815-AJ
11
3.7
SNMP .............................................................................................................................. 104
3.7.1
Disabling SNMP ............................................................................................................... 104
3.7.2
Example: Disabling SNMP for a CPU 1516-3 PN/DP ............................................................ 105
4
PG communication ............................................................................................................................ 107
5
HMI communication .......................................................................................................................... 110
6
Open User Communication ................................................................................................................ 112
6.1
Overview of Open User Communication ........................................................................... 112
6.2
Protocols for Open User Communication .......................................................................... 113
6.3
Instructions for Open User Communication ...................................................................... 115
6.4
Open User Communication with addressing via domain names ........................................ 119
6.5
Setting up Open User Communication via TCP, ISO-on-TCP, UDP and ISO .......................... 122
6.6
Setting up communication over FDL ................................................................................. 128
6.7
Setting up communication with Modbus TCP .................................................................... 130
6.8
Setting up communication via e-mail ............................................................................... 133
6.9
Setting up communication via FTP ................................................................................... 134
6.10
Establishment and termination of communications relations ............................................ 137
7
S7 communication ............................................................................................................................. 138
8
Point-to-point link .............................................................................................................................. 147
9
OPC UA communication ..................................................................................................................... 152
9.1
What you need to know about OPC UA ............................................................................. 152
9.1.1
OPC UA and Industrie 4.0 ................................................................................................. 152
9.1.2
General features of OPC UA .............................................................................................. 153
9.1.3
OPC UA for S7-1200/S7-1500 CPUs .................................................................................. 156
9.1.4
Access to OPC UA applications ......................................................................................... 157
9.1.5
Addressing nodes ............................................................................................................ 161
9.1.6
What you need to know about OPC UA clients .................................................................. 165
9.1.7
Mapping of data types ..................................................................................................... 169
9.2
Security at OPC UA ........................................................................................................... 172
9.2.1
Security settings .............................................................................................................. 172
9.2.2
Certificates pursuant to ITU X.509 .................................................................................... 173
9.2.3
Certificates with OPC UA .................................................................................................. 177
9.2.4
Creating self-signed certificates ........................................................................................ 178
9.2.5
Generating PKI key pairs and certificates yourself ............................................................. 179
9.2.6
Secure transfer of messages ............................................................................................. 182
9.2.7
Certificate management via Global Discovery Server (GDS) ............................................... 185
9.2.7.1
Automated certificate management with GDS .................................................................. 185
9.2.7.2
Configuration limits for Push function .............................................................................. 188
9.2.7.3
Setting and loading GDS parameters ................................................................................ 189
9.2.7.4
GDS commissioning ......................................................................................................... 190
9.2.7.5
Address model for the push certificate management ........................................................ 194
9.2.7.6
CertificateGroups in the address model ............................................................................ 199
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