Fisher FIELDVUE DVC6200 Instruction Manual page 39

Instruction Manual
D103409X012
Commissioning the Digital Valve Controller for use with the HART
Tri‐Loop Signal Converter
To prepare the digital valve controller for use with a 333 HART Tri‐Loop, you must configure the digital valve controller
to burst mode, and select Burst Command 3. In burst mode, the digital valve controller provides digital information to
the HART Tri‐Loop HART‐to‐Analog Signal Converter. The HART Tri‐Loop converts the digital information to a 4 to 20
mA analog signal. Each burst message contains the latest value of the primary (analog input), secondary (travel
target), tertiary (configured output pressure), and quaternary (travel) variables.
To commission a DVC6200 for use with a HART Tri‐Loop, perform the following procedures.
Note
Instrument level AC does not support HART Command 3 or Burst Mode communications.
Set the Burst Operation
Field Communicator Configure > Detailed Setup > Mode and Protection > Burst Mode (1‐2‐1‐4)
1. Select Change Burst Enable. Select Enable then press ENTER and SEND.
2. Select Change Burst Command. Select the desired command (HART Univ Command 3).
3. Select Cmd 3 Configured Pressure. Select the pressure you desire the HART Tri‐Loop to use as the tertiary variable.
Command 3 provides the following variables:
Primary variable—analog input in % off mA,
Secondary variable—travel target in % of ranged travel,
Tertiary variable—supply or output pressure in psig, bar, kPa, or kg/cm
select if the output A, output B, differential (A-B), or supply pressure is sent.
Quaternary variable—travel in % of ranged travel.
2
. Select Cmd 3 Press from the Burst menu to
Installation
May 2013
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