In this application example, we explain how to program an S7 function block so that it can be called up as an OPC UA method on the server of an S7-1500. From a PLC programmer’s point of view, OPC UA methods on a SIMATIC S7 controller are just conventional S7 function blocks.
OPC UA - Siemens Global
The open, Ethernet-based communication standard OPC UA (Open Platform Communications Unified Architecture) offers optimal conditions for digitalization. Ideal for communication between machines and vertical connectivity to the cloud.
Oct 29, 2018 · Use of OPC UA as an integrated communication standard for HMI, SCADA, MES with more than 1000 data points per second. The maximum quantity structures of the CPU 1517 and 1518 are up to a factor of 10 higher compared to smaller CPUs (e.g. 1510). Security mechanisms have a negative effect on performance, especially when establishing a connection.
SIMATIC S7-1200 and OPC UA: The top 5 features you should
Feb 16, 2022 · We’re so excited that we can use OPC UA with SIMATIC S7-1200, a standard that we think is a milestone for automation in the digital environment. Here are the top five reasons why we think you should get excited, too.
For this, the communications processor CP 443-1 OPC UA delivers a flexible solution. It makes the connection of a SIMATIC S7-400 to an Industrial Ethernet network possible, independent of manufacturer.
The following pages show how the data of SIMATIC S7-1500 can be accessed via OPC UA in a project with SIMATIC S7-1500. OPC Scout V10 and SIMIT V9.1 are used as OPC UA clients.
The SIMATIC NET OPC Server supports the interfacing of applications with any automation components networked over PROFIBUS or Industrial Ethernet. SIMATIC NET OPC server offers the following communication functions for OPC UA: • S7 communication – S7 OPC UA server (see chapter 4.1.1) – S7OPT OPC UA server (see chapter 4.1.2)
OPC UA communication is supported on S7-1200 CPUs with firmware version 4.4 or higher. The CPU enables data access by supporting configuration as an OPC UA Server. For access by OPC UA Clients, the OPC UA Server stores the released PLC tags and other information in the form of nodes. These nodes are interconnected and form a network.
A simple OPC UA .NET client for Windows PCs/PGs communicates with the OPC UA server of a SIMATIC S7-1500. The client supports the following OPC UA service sets:
With this extension you can implement M2M communication completely via OPC UA on a SIMATIC S7-1500 controller. In contrast to the OPC UA server of the controller, the OPC UA client is programmed via many system function blocks and not only configured.