Emerson Micro Motion SGM Series - Page 119

Options for burst message contents (continued)Table 10-9:
HART
command
Label
DescriptionProLink III Field Communicator
2
Primary Variable (Percent
Range/Current)
Pct Range/Current
The transmitter sends the PV’s actual mA level and
the PV’s percent of range in each burst message
(e.g.,11.0 mA 25%).
3
Process Variables/Current Process Vars/Current
The transmitter sends the PV’s actual milliamp read-
ing and the PV, SV, TV, and QV values in measure-
ment units in each burst message (e.g.,11.8 mA,
50 g/sec, 23 °C, 50 g/sec, 0.0023 g/cm
3
).
9
Read Device Variables with
Status
Device Variables with Status
The transmitter sends up to eight user-specified
process variables in each burst message.
33
Transmitter Variables Field Device Vars
The transmitter sends four user-specified process
variables in each burst message.
48
Read Additional Transmitter
Status
Read Additional Device Sta-
tus
The transmitter sends expanded device status infor-
mation in each burst message.
4. Depending on your choice, select the four or eight user-specified variables for the
burst message, or set the HART variables as desired.
Important
If you change the HART Primary Variable (PV) or Secondary Variable (SV), the process
variables assigned to the primary mA output and the secondary mA output (if applicable) are
automatically changed to match. The PV cannot be changed on devices with fixed mA output
assignments.
Configure HART trigger mode
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.
Restriction
This feature is available only with a HART 7 host.
Integrate the meter with the control system
Configuration and Use Manual 111