Emerson Micro Motion Configuration And Use Manual

Configure HART trigger mode
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ProLink III Device Tools > Configuration > Communications > Communications (HART)
Field Communicator Configure > Manual Setup > HART > Burst Mode > Burst Message x > Configure Update Rate
Overview
Trigger mode uses the burst message mechanism to indicate that a process variable has
changed. When trigger mode is implemented, the bursting interval (HART update rate)
changes if Primary Variable or Burst Variable 0 moves above or below the user-specified
trigger level. You can set up a different trigger on each burst message.
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 affected
by changes in process variables.
Falling • When the specified process variable is above Trigger Level, the burst message
is sent at Default Update Rate.
• When the specified process variable is below Trigger Level, the burst message
is sent at Update Rate.
Rising • When the specified process variable is below Trigger Level, the burst message
is sent at Default Update Rate.
• When the specified process variable is above Trigger Level, the burst message
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.
Integrate the meter with the control system
Configuration and Use Manual 93

Emerson Micro Motion Specifications

General

Category	Measuring Instruments
Manufacturer	Emerson
Brand	Micro Motion
Type	Coriolis Flow Meter
Output	4-20 mA, HART, Foundation Fieldbus, Profibus, Modbus
Power Supply	24 V DC
Material	Stainless Steel, Hastelloy
Process Connection	Flanged, Threaded
Certifications	ATEX, IECEx, CSA, SIL
Pressure Rating	Varies by model; up to 10, 000 psi (690 bar)
Temperature Range	Varies by model; -400 to 750°F (-240 to 400°C)