Application And Functions; Application; Communication Services - Siemens SIMATIC S7-400 Operating Instructions Manual

Application and functions

1.1

Application

Application
The CP is intended for operation in a SIMATIC S7-400 automation system.
Via its Ethernet interface (1 x RJ45) the CP allows the S7-400 to function as an OPC UA
client and an OPC UA server.
1.2

Communication services

The CP supports the following communication services:
OPC UA
The CP supports OPC UA according to the specification 1.02 and uses the binary protocol
(UA Binary).
The CP can adopt the role of an OPC UA server and an OPC UA client.
● OPC UA server
– Synchronous reading and writing of data
– Asynchronous reading and writing of data
– Makes data available using OPC UA Data Access
– Monitoring variables (MonitoredItems) with the aid of Subscriptions
– Up to 10 sessions with OPC UA clients at the same time
– Hierarchical address browsing
The server function can be enabled or disabled in the configuration.
● OPC UA client
– Asynchronous reading and writing of data
– Setup of up to 5 sessions with OPC UA servers at the same time.
– The connection establishment with the OPC UA servers and the data transfer is
The client function can be enabled or disabled in the configuration.
You will find the detailed configuration limits for the server and client function in the section
Configuration limits - communication (Page 16).
CP 443-1 OPC UA
Operating Instructions, 01/2017, C79000-G8976-C427-02
implemented using program blocks.
See section Programming the OPC UA client blocks (Page 79) for information on this.
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