| Variable|| OpcUaVariable|| In || The variable to read or write as produced by a [[CreateOPCUAScope (Activity)|Scope activity]].
|- align="left"
| Value|| object{{Object_MSDN}}|| InOut || The value to write to the variable. If null, the variable will be read.
|- align="left"
| Connection|| OpcUaServerConnection|| In || If the activity is not embedded with an [[CreateOPCUAScope (Activity)|Scope activity]], a valid connection has to be specified.
| Quality|| OpcUaQuality|| Out || The quality of the accessed value as delivered by the OPC source
|- align="left"
| Result|| Boolean{{Boolean_MSDN}}|| Out || True if successful, false if failed
|}