DelRead

Description:	Is called by a tag to delete an existing read request, as created by an AddRead.
Returns:	Nothing
Usage:	Script Only.
Function Groups:	Memory I/O
Related to:	AddRead
Format:	VTSDriver\DelRead(Address, Value, Rate)
Parameters:

Address

Required. The address from which to get the data.

Value

Required. A pointer to the destination for the read data.

Rate

Required. The update rate in seconds.

Comments:

DelRead() can only delete a single item. The module searches ReadList (a linked list of ReadBlocks) for the node whose info vars match those of the item to be deleted. It then looks for the matching rate, then the specific request as identified by Value (the address of the tag's RawValue) and removes it from the list.