Notification Destination (ND) setting
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Description (see setting description format info here)
Notification (J) messages are generated when one of the monitored I/O lines of the DS changes its state. Which I/O lines are monitored for changes is defined by the Notification Bitmask (NB) setting. Notifications are only sent when the data connection is established and are sent to the network host with which this connection is established. Notification Destination defines which UDP port on the destination host notifications are sent to when notifications are being sent as UDP datagrams (out-of-band):
Notification Destination is irrelevant when the Notification Bitmask (NB) is set to is 0 because this means that no I/O lines of the DS are monitored for changes (so there will be no notifications to generate). Notification Destination is also irrelevant when notifications are being sent inside the data TCP connection itself (see Notification (J) message for more information on when this happens).