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Operating Instructions
Teledyne API - Model T200H/T200M Operation Manual
178
4.15.4.6. Setting Hessen Protocol Status Flags
Teledyne API’ implementation of Hessen protocols includes a set of status bits that are
included in responses to inform the host computer of the T200H/M’s condition. The
default settings for these bit/flags are:
Table 4-37: Default Hessen Status Bit Assignments
Note
It is possible to assign more than one flag to the same Hessen status bit. This
allows the grouping of similar flags, such as all temperature warnings, under the
same status bit. Be careful not to assign conflicting flags to the same bit as each
status bit will be triggered if any of the assigned flags is active.
STATUS FLAG NAME
DEFAULT BIT ASSIGNMENT
WARNING FLAGS
SAMPLE FLOW WARNING
0001
OZONE FLOW WARNING
0002
RCELL PRESS WARN
0004
BOX TEMP WARNING
0008
RCELL TEMP WARNING
0010
PMT TEMP WARNING
0040
CONVERTER TEMP WARNING
0080
WARMUP MODE
1000
INVALID CONC
8000
OPERATIONAL FLAGS
In Manual Calibration Mode
0200
In O
2
Calibration Mode
0400
In Zero Calibration Mode
0400
In Low Span Calibration Mode
0800
In Span Calibration Mode
0800
UNITS OF MEASURE FLAGS
MGM
2000
PPM
6000
SPARE/UNUSED BITS
0020, 0100
UNASSIGNED FLAGS
Box Temp Warning
Analog Cal Warning
System Reset
Cannot Dyn Zero
Rear Board Not Detected
Cannot Dyn Span
Relay Board Warning
O
2
Cell Temp Warn
Manifold Temp Warn
AutoZero Warning
Ozone Gen Off
Conc Alarm 2
Conc Alarm 1
In MP Calibration Mode
HVPS Warning
07270D DCN7141