Command 14 - Honeywell SS4-A HART User Manual

3.4 Command 3
Use command 3 to read dynamic variable and loop current.
Response to command 3:
Byte Format
0 to 3 Float
4 Code
5 to 8 Float
9 Code
10 to 13 Float
14 Code
15 to 18 Float
19 Code
20 to 23 Float
2ma = 10%
4ma = 20%
20ma = 100%
Description
Primary Variable Loop current (Unit in milli-ampere)
0 ma : PCB fault, Voltage fault, temperature fault,
relay fault.
2 ma : Optical Self Test fail & Lid Off fault.
4 ma : Normal.
20 ma : Alarm
Unit code for ma . Variable 1
Variable 1. Voltage Fault
4 ma : Normal
20ma :Voltage Fault (either too low or too high)
Unit code for ma. Variable 2
Variable 2. Temperature Fault
4 ma : Normal
20ma : Temperature too high.
Unit code for ma. Variable 3
Variable 3. Self test and lid off
4 ma :Normal
20ma :Self Test Fail (window dirty) and/or Lid is off.
Unit code for ma. Variable 4
Variable 4. Communication between FSCHCOM
module and the SS4 flame detector.
4 ma : Normal.
20ma : Temperature too high.
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