OPC DA Connect Custom Step Types are based on OPC Foundation OPCDAAuto ActiveX Control. They allow performing Read / Write operations on OPC Variables connecting an OI Server.
The OPC DA Connect type palette provides an access to the following step types:
• Connection management–They allow managing connection to an OPC Server:
• Reading steps–They allow reading values from an OPC Variable:
• Writing steps–They allow writing various type values from to OPC Variable:
The OPC steps are available in TestStand™ insertion palette under OPC DA Connect.
They are also available using a right-click in Step View of a sequence, Insert Step » OPC DA Connect.
Note It is mandatory to use the Open Connection step to connect to the OPC Server before performing Read / Write operations. |