Keep OPC Item On Scan

With this option selected the communications to the OPC Item will always be enabled unless the Device Read option is selected.

When this option is disabled communications to the OPC Item will be enabled only when one or more clients are requesting the value from the Tag.  If the point is trended, enabled for alarm monitoring with any one of the alarm limits enabled, or set as a Target output to another OPC Item this OPC Item will always be on scan regardless if there is a requesting client.

Note: Not recommended for OPC Items from RS-Linx OPC Server as it does not handle dynamic adding and removing items well.