DIN EN 62541-4
OPC unified architecture - Part 4: Services (IEC 62541-4:2015); English version EN 62541-4:2015
|Publication Date:||1 October 2015|
|ICS Code (IT applications in industry):||35.240.50|
|ICS Code (Interface and interconnection equipment):||35.200|
This part of IEC 62541 defines the OPC Unified Architecture (OPC UA) Services. The Services described are the collection of abstract Remote Procedure Calls (RPC) that are implemented by OPC UA Servers and called by OPC UAClients. All interactions between OPC UA Clientsand Servers occur via these Services. The defined Services are considered abstract because no particular RPC mechanism for implementation is defined in this part. IEC 62541-6 specifies one or more concrete mappings supported for implementation. For example, one mapping in IEC 62541-6 is to XML Web Services. In that case the Services described in this part appear as the Web service methods in the WSDL contract.
Not all OPC UA Servers will need to implement all of the defined Services. IEC 62541-7 defines the Profiles that dictate which Services need to be implemented in order to be compliant with a particular Profile.