<7. HART Communication>
7-25
IM 01C25W05-01EN
2. Set the send time and minimum event retention
time.
Set the retry time for when events occur (Event
Notification Retry Time), the update time for
when there are no events (Max Update Time),
and the minimum event retention time (Event
Debounce Interval).
Set Event Notification Retry Time to a value
smaller than Max Update Time.
Event Notification Retry
Time/Max Update Time
Event Debounce Interval
—
Off
0.5 s
0.5 s
1 s
1 s
2 s
2 s
4 s
4 s
8 s
8 s
16 s
16 s
32 s
32 s
1 min
1 min
5 min
5 min
10 min
10 min
15 min
15 min
30 min
30 min
45 min
45 min
60 min
60 min
3. Enable event monitoring.
Set Event Notification Control to Enable event
notification on token-passing data link layer.
(3-2) Acknowledging events (DTM only)
When the host device acknowledges an event,
event transmission stops.
To acknowledge events, follow the procedure
below.
• Recalling event acknowledge
Recall
parameters
[Root menu] → Detailed setup →
Output condition → HART output →
Event Notification → Acknowledge→
Acknowledge
Event
Notification
(method)
Get and acknowledge an event
number.
1. Get the event number.
Get the latest event number.
Execute the Acknowledge Event Notification
method.
1) Enter 0 in Read Event Notification.
2) OK
3) Confirm Event Number and contents of
event.
2. Acknowledge the event.
Get the latest event with the event number and
acknowledge the event.
Execute the Acknowledge Event Notification
method.
1) Set Send Acknowledge.
2) OK
3) Confirm that Event Status is cleared.
