Which one to use out of this again depends on the size of project. If you are looking for Control of the plant through a HMI with graphic screens etc. This can be used, forĮxample, for the download of recipe data for the S7.It all depends on what kind of monitoring and control you are looking for. Two blocks with different contents can be sent. In the “Block Write” group, data blocks can be sent to the S7 which are there received by theīRECV block service.

This can be, for example, used for the sending of result data from the S7Ĩ. In the “Block Read” group, data can be received which is actively sent by the S7 with theīSEND block service. The conversion is on the basis of the data type which isħ. In order to write, “read” has to be called first since the text from the text box has to be converted The Write button writes the value from the text box next to the button onto the tag identified by The Read button reads the values (Attribute value) of both tags with the specified NodeIDs andĭisplays them in the text boxes next to the button.Ħ. Errors are displayed instead of the values.ĥ. The data changes are displayed in the text boxes next to theīutton.

Secure connectionĮstablishment is explained in the next example.Ĥ.Ě subscription is created via the Monitor button and two Monitored Items are created in the The connection is only established without security. Via the Connect and Disconnect buttons, the connection to the OPC server can be established The NodeID for reading and writing is made up of identification and namespace.ģ. In the text boxes for the Tag Identifier the identification code of the NodeID is indicated. S7COM: for direct addressing via the OPC DA compatible Syntax andĢ. In the Namespace URI: the namespace used is indicated.

For the SIMATIC NET OPC Server this is composed of opc.tcp://:4845. Simple OPC UA Client app is used as a reference for this plugin. NET Client with C# for the SIMATIC NET OPC UA ServerĬode Executable OPC UA Clients, commented source code (simple & advanced), complete associated STEP 7 V13 project

Note that OPC UA code saves a self created certificate so the first time this plugin is ran the executing user OpcUAPluginSettings is parsed using DataContract serializer which requires that setting items are in certain order so DO NOT change the order of the items in SampleSettingsFile.xml!

Opc simatic net syntax