Command 12; Command 13 - Honeywell SS4-A HART User Manual

16 Unsigned 8
17 to 18 Unsigned
16
3.2 Command 1
Use command 1 to read the Primary Variable.
Response to command 1:
Alarm and Device status is save into the Primary Variable (Unit in ma), where :
.
Byte Format
0 Code
1 to 4 Float
3.3 Command 2
Use command 2 to read Loop current (ignore percent range).
Response to command 2:
The loop current always matches the current that can be measured by milli-
ammeter in series with the device. This includes the loop current under alarm
conditions. SS4 flame sensors does not have percent value, therefore please
ignore the percent output of this response.
Byte Format
0 to 3 Float
4 to 7 Float
Device status
Manufacturer ID code = Hex 60 42
Description
Unit code in ma
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
Description
Loop Current 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
% reading.
0ma = 0%
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