Table of contents
Communication
8 Function Manual, 12/2017, A5E03735815-AF
6.10 Establishment and termination of communications relations ................................................. 92
6.11 Secure Open User Communication ....................................................................................... 93
6.11.1 Secure OUC of an S7-1500 CPU as TLS client to an external PLC (TLS server) ................ 93
6.11.2 Secure OUC of an S7-1500 CPU as TLS server to an external PLC (TLS client) ................ 95
6.11.3 Secure OUC between two S7-1500 CPUs ............................................................................ 98
6.11.4 Secure OUC via CP interface .............................................................................................. 102
6.11.5 Secure OUC with Modbus TCP ........................................................................................... 107
6.11.6 Secure OUC via e-mail ........................................................................................................ 108
7 S7 communication ............................................................................................................................... 112
8 Point-to-point link ................................................................................................................................. 121
9 OPC UA communication ...................................................................................................................... 126
9.1 What you need to know about OPC UA .............................................................................. 126
9.1.1 OPC UA and Industrie 4.0 ................................................................................................... 126
9.1.2 Structure of the description .................................................................................................. 126
9.1.3 General features of OPC UA ............................................................................................... 128
9.1.4 From the Classic OPC interface to OPC UA ....................................................................... 129
9.1.5 The OPC UA server of the S7-1500 CPUs .......................................................................... 130
9.1.6 Addressing nodes ................................................................................................................ 132
9.1.7 Mapping of data types .......................................................................................................... 136
9.1.8 End points of the OPC UA server ........................................................................................ 138
9.1.9 Runtime behavior of the OPC UA server ............................................................................. 140
9.1.10 What you need to know about OPC UA clients ................................................................... 142
9.2 Security at OPC UA ............................................................................................................. 145
9.2.1 Security settings ................................................................................................................... 145
9.2.2 Certificates pursuant to ITU X.509 ....................................................................................... 146
9.2.3 Certificates with OPC UA ..................................................................................................... 149
9.2.4 Creating self-signed certificates ........................................................................................... 150
9.2.5 Generating PKI key pairs and certificates yourself .............................................................. 151
9.2.6 Secure transfer of messages ............................................................................................... 154
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