This Driver performs a scan of the modules needed for each device based on the time configured in the Update Interval (ms) option of the ME3011 tab. When reading a Tag, all available events are returned, containing the value, 0 (zero) or 1 (one), the quality, and the timestamp with a precision of 1 (one) millisecond.

However, as events are read by this Driver, they are not removed from a device. Therefore, an application must store, the current reading position of the event queue, that is, the Position of the Event Queue Tag, and then inform that position to this Driver during the initialization of that application. Otherwise, events can be duplicated or lost, depending on the amount of events generated while this Driver was disconnected from a device.

Writing the last position for this Driver must be performed before connecting the physical layer. Therefore, this Driver must be started in Offline mode, write the value of the last position, and then configure this Driver to Online mode. For more information, please check topic Documentation of I/O Interfaces.