Switching the ethercatmaster state via OPC UA

Hi CodeShepherd ,

Do you know if it is possible to switch EtherCAT master status to OP using OPCUA Client?

I have tried using UA.TestClient unfortunately the datatype for the masterstate node datatype is ExtensionObject. 

Is it possible to decode OPCUA client datatype ExpansionObjects value to string and write OP and INIT value to masterstate to switch between EtherCAT OP and INIT?

Warmest regards,