Prerequisites
Before you can configure trigger mode, the corresponding HART burst message must be
enabled.
Procedure
1. Select the burst message for which you will set up trigger mode.
2. Set Trigger Mode to the type of trigger you want to use.
Option Description
Continuous
The burst message is sent at Default Update Rate. The burst interval is not affec-
ted by changes in process variables.
Falling
• When the specified process variable is above Trigger Level, the burst mes-
sage is sent at Default Update Rate.
• When the specified process variable is below Trigger Level, the burst mes-
sage is sent at Update Rate.
Rising
• When the specified process variable is below Trigger Level, the burst mes-
sage is sent at Default Update Rate.
• When the specified process variable is above Trigger Level, the burst mes-
sage is sent at Update Rate.
Windowed
This option is used to communicate that the process variable is changing rapid-
ly. Trigger Level defines a deadband around the most recently broadcast value.
• If the process variable stays within this deadband, the burst message is sent
at Default Update Rate.
• If the process variable moves outside this deadband in either direction, the
burst message is sent at Update Rate.
On Change
• If any value in the burst message changes, the burst message is sent at Up-
date Rate.
• If no values change, the burst message is sent at Default Update Rate.
3. Ensure that Primary Variable or Burst Variable 0 is set to the variable that will
activate the trigger. If it is not, reconfigure the burst message contents.
4. Set Trigger Level to the value of the process variable at which the trigger will be
activated.
5. Set Default Update Rate to the burst interval to be used when the trigger is not
active.
6. Set Update Rate to the burst interval to be used when the trigger is active.
Configure HART event notification
ProLink III
Device Tools > Configuration > Communications > Communications (HART) > Event No-
tification
Field Communicator Configure > Manual Setup > HART > Event Notification
Integrate the meter with the control system
112 Micro Motion
®
Gas Specific Gravity Meters (SGM)
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