Instruction Manual

Instruction Manual Supplement
D103639X012
DVC6200 Digital Valve Controller
August 2014
7
Unit Codes
Variable Units Code Units
0 No Units
6 Pounds per square inch, psi
7 Bar
10 ($0A) Kilograms per square centimeter, kg/cm
2
12 ($0C) Kilopascals, kPa
32 ($20) Celsius, _C
33 ($21) Fahrenheit, _F
39 ($27) Milliamps, mA
57 ($39) Percent, %
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
pressure, 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 RESET sequence is executed or at initial
device power up. Cleared by the first HART command. Two such bits exist
internally, one for each HART master.
4 More Status Active when any bit in command 48 is active.
3 Analog Input Fixed
Active if the Instrument Mode of the DVC6200 is in the “Out Of Service”
condition or if the Control Mode of the DVC6200 is in one of the digital set
point modes.
2 Analog Input Saturated The loop current reading is beyond sensor limits.
1 Internal Sensor Out of Limits
(This bit is named “NonPrimary 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 Variable Out of Range Set when any variable 0, 1, 2, 3, 5, 8 or 10, is saturated.