Claire Corlett

Fish Food, Fish Tanks, and More
Using the Fisher FIELDVUE DVC6200 Digital Valve Controller with a Wireless THUM Adapter

Using the Fisher FIELDVUE DVC6200 Digital Valve Controller with a Wireless THUM Adapter


In this video we’ll highlight how the
THUM wireless adapter can be used with the Fisher FIELDVUE HART digital
valve controllers to wirelessly obtain HART variables such as feedback, alerts,
and even carry out diagnostic tests. This solution is ideal for applications in
which existing plant infrastructure leaves potential information stranded in
the field. The THUM adapter can help access the stranded information without
having to carry out extensive re-engineering and rewiring of the
existing infrastructure. Access to this information can be crucial to creating a
safer and better optimized plant. Here we have a Fisher FIELDVUE DVC6200
digital valve controller mounted on a Fisher valve and actuator assembly. The
DVC6200 is connected to a loop calibrator which simulates the function
of an analog output from the control system and provides a 4 to 20 milliamp
input signal to the DVC6200. The signal is processed and converted to pneumatic
outputs to control the valve. While operating, the DVC6200 is able to
provide information through these two wires using HART communication, however,
if the existing infrastructure or control system is not designed to
receive this information it becomes stranded. The THUM wireless adapter is a
perfect solution. The THUM adapter is loop powered and can be connected
anywhere along the pair of wires running to the device. It then converts the HART
information typically sent over these wires to a wireless HART signal that’s
received by a gateway. The information can then be viewed on a server or PC
with AMS device manager. On the PC we’re able to see that
DVC6200 is connected to the wireless network using a THUM adapter. When you
open the device overview you’re able to see variables such as valve travel
feedback, actuator pressure, input current, target travel, and a host of alerts. This
information would be unavailable if left stranded but now it can be mapped back
to the control system through Modbus or OPC to perhaps trend or archive.
Connecting the DVC6200 wirelessly will also allow for remote diagnostic
capabilities. Using AMS valve links snap on you’ll be able to perform both online
and offline diagnostics. Let’s start a PD one-button test to see if there are any
issues with our current setup. The PD one-button test is an online test. This
means it can be done when the plant is operational without affecting process
control. A wireless signal is sent to the device to perform the diagnostics. The PD
one-button test carries out tests on different aspects of the digital valve
controller and valve assembly. It checks on the supply pressure, travel
deviation, functionality of the IDP and relay, and air mass flow between the
instrument and actuator. It will highlight possible issues and provide
possible causes and fixes for it. Diagnostic information is then sent from
the device back to the wireless gateway. As you can see the PD one-button test
has highlighted no issues with our current setup. Visit Fisher.com to learn
more about the Fisher FIELDVUE DVC6200 and THUM adapter. Thanks for
watching!

1 comment on “Using the Fisher FIELDVUE DVC6200 Digital Valve Controller with a Wireless THUM Adapter

  1. I have installed a new positioner onto our gas lift compressor antisurge valve and have an issue with the pneumatic signal to the actuator pulsing twice a second. The 4-20ma signal is not changing to the positioner from our DCS. Can I make changes gas compressor online with hart without the valve stroking or can I look at the PD one button without affecting the valve.

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