Flowserve MX HART Field Unit User Manual
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MX/QX HART Field Unit FCD LMENIM2340-00 – 1/14
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Figure 3.6 – Event Notification
The Event Mask allows the user to select those bits from Field Device Status and Command 48 data which they want
to trigger and event. When the user clicks the “Event Mask” button, the following menu will appear, allowing them to
select the event triggers:
Figure 3.7 – Event Mask
3.5.4.2 Handling of Event Notifications
The MX/QX HART device detects a change in the selected bit from high to low, and low to high. Therefore, any change
in a bit, either to set it or clear it, will generate an event. The first occurrence of the event (change in any of the selected/
masked bits) is latched and Time Stamped. The event notification shall be sent repeatedly with a period of ‘Event
Notification Retry Period’ until the event is Acknowledged by the Master. The Time Stamp shall remain the same until
an Acknowledge is received from the Host/Master. Once an Acknowledge is received, the Time Stamp shall be set to