This part of IEC 62541 defines the OPC Unified Architecture (OPC UA) Services. The Services defined are the collection of abstract Remote Procedure Calls (RPC) that are implemented by OPC UA Servers and called by OPC UA Clients. All interactions between OPC UA Clients and Servers
DIN EN IEC 62541-4:2021 history
2021DIN EN IEC 62541-4:2021 OPC Unified Architecture - Part 4: Services (IEC 62541-4:2020); English version EN IEC 62541-4:2020
2019DIN EN IEC 62541-4 E:2019 Draft Document - OPC Unified Architecture - Part 4: Services (IEC 65E/602/CDV:2018); English version prEN IEC 62541-4:2018
2015DIN EN 62541-4:2015 OPC unified architecture - Part 4: Services (IEC 62541-4:2015); English version EN 62541-4:2015
DIN EN IEC 62541-4:2021 OPC Unified Architecture - Part 4: Services (IEC 62541-4:2020); English version EN IEC 62541-4:2020 was changed to DIN EN 62541-4:2015 OPC unified architecture - Part 4: Services (IEC 62541-4:2015); English version EN 62541-4:2015.