OPC Toolbox™

cancelasync - Cancel asynchronous read and write operations

Syntax

cancelasync(GObj)
cancelasync(GObj,TransID)

Description

cancelasync(GObj) cancels all asynchronous read or write operations that are in progress for the group object specified by GObj. Note that this function is asynchronous and does not block the MATLAB^® command line.

After the in-progress asynchronous operations are cancelled, the OPC server generates a cancel async event. If you specify an M-file callback for the CancelAsyncFcn property, then the callback function executes when this event occurs.

cancelasync(GObj,TransID) cancels the asynchronous operation(s), specified by the transaction ID(s) given by TransID. You can cancel specific asynchronous requests using this syntax.

See Also

readasync, writeasync

additem

cleareventlog