Instruction Manual Supplement
D103783X012
DVC2000 Digital Valve Controller
September 2017
7
Status Information
Device Status
The Field Device Status Byte is the only status byte defined in the HART protocol. The order and meaning of each of the
eight bits within the byte are fixed by the protocol. This byte is one of the status bytes included with each HART
response. It is not part of the Command 48 data.
Bit Name of Status Bit Meaning
7 Field Device Malfunction
Set / cleared by the firmware based on self test results. This bit is set if the
position or temperature sensors provide invalid readings.
6 Configuration Changed
Two such bits exist internally, one for each HART master. Both copies are set
when any variable, HART message, tag, descriptor or date are changed from
HART. Cleared by command 38, separately for each master. This bit survives
loss of power.
5 Cold Start
Set by the firmware whenever a HARD RESET sequence is executed or at initial
device power up. Cleared by the first HART command.
4 More Status Active when any bit in command 48 is active.
3 Analog Input Fixed
Active if the Instrument Mode of the DVC2000 is in the “Out Of Service”
condition or if the Control Mode of the DVC2000 is in one of the digital set
point modes.
2 Not Used
1 Internal Sensor Out of Limits
(This bit is named “NonPrimary Variable Out Of Limits” in the HART
documentation for transmitters. It has been renamed to reflect the fact that
these variables are INTERNAL INPUTS to FIELDVUE products). The firmware sets
this bit when any sensor (pressure, position, temperature) exceeds its operating
limits.
0 Loop Current Out of Range Set when any variable 0 (Analog Input) is saturated.
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