User guide

5 - 29
PN 074-566-P1B
Composer Elite Operating Manual
5.6.3 Update Commands
Message = U <Command ID><Sensor><Internal Parameter><Data>
Command ID = <Byte> See Command ID in Table 5-20.
Sensor = <Byte> 1-5
Internal Parameter = <Byte> 0
Data = <Float> See range column in Table 5-20.
Response = None (header and trailer only)
Table 5-20 Query & Update commands
Q & U
Command
ID
Name Range
(low/high)
Data
Type
Note Restrictions
2 Carrier Molecular Weight 1.000 -
1000.000
(AMU)
Float This value represents the
molecular weight of the lighter gas.
-
3 Carrier Gamma 1.0000 -
2.0000
Float This value represents the
Carrier’s specific heat ratio.
-
4 Precursor Molecular Weight 1.000 -
1000.000
(AMU)
Float This value represents the
molecular weight of the
heavier gas.
-
5 Precursor Gamma 1.0000 -
2.0000
Float This value represents the
Precursor’s specific heat ratio.
-
6 Allow User Zero 0-1 Integer Current value of Allow User Zero. -
7 Reserved For Future Use
8 Reserved For Future Use
9 Query Zone 1 Temperature 30.00 -
65.00(ºC)
Float Current value of the Zone 1
Temperature Setpoint parameter of
the Acoustic Sensor’s resonant
chamber.
-
Zone 2 Delta -99.999 -
99.999(ºC)
Float Current value of the Zone 2
Temperature Delta parameter of
the Acoustic Sensor’s resonant
chamber.
Will reject an
update for
Heater 2 if the
temperature is
not within the
30 to 68°C
range.
10 Result Averaging Filter Depth 0-100 Integer Current value of Averaging Filter
Depth.
-
20 Sets/Gets Bit Pattern for S0
Command
0 - 0x7FF8
0000
Encode Each bit represents a piece of data
returned. When a bit is set (1) that
piece of data is returned in the S0
command response. Refer to Table
5-18 for details of which byte
relates to what data.
Bit = 0 Data not sent.
Bit = 1 Data is sent.