Emerson NGA2000 Reference Manual page 144

Reference Manual
748384-C
September 2003
MISC_INT
Direction
Binding
Type
Value range
Units
Description
Usage
See also
OP
Direction
Binding
Type
Value range
Units
Description
Usage
See also
OP_RANGE
Direction
Binding
Type
Value range
Units
Description
Usage
See also
3-18 I/O Modules Variables
Output
None
3-element integer array
1 - 255 except element 3, 0-7.
None
ACAL and SCAL only; miscellaneous integer values.
How many zeros are done before a complete calibration.
How many zeros have been done since the last complete calibration.
The slot identification.
When the ACAL or SCAL modules are set to perform periodic calibrations, they
can be told to do some number of zero calibrations and only occasionally to do a
complete zero and span calibration. Most analyzers are more stable on span than
on zero, and span gases are normally more expensive, so this is practical for
applications other than EPA compliance. The first element determines how many
zeros to do before a complete calibration. The second element shows how many
such zeros it has done.
The third element is the same as SLOTPOSITION on the AIO module
SLOTPOSITION
Output
None
2-element floating point array
-10 to +22
None
AIO, ACAL only
The desired output for voltage calibration.
The desired output for current calibration.
When TESTMODE is set to "MST", the 1/0 module puts out what it thinks is the
this value of voltage or current, depending on the setting of RNG1EL The user
can then use CAL- to calibrate the output.
TESTMODE
CAL_
output
None
Enumerated
Analyzer; Fixed on 1; Fixed on 2; Fixed on 3; Fixed on 4.
None
AIO, ACAL only; determines how the analog output responds when the analyzer
range is changed.
When this variable is set to "Analyzer", if CRANGEI or CRANGEO is changed,
the output will track the new range, that is to say the output will be the same
percentage of its scale as the PVA is percentage of its current range. If this
variable is set to "Fixed on n" where n is I through 4, the output will be scaled to
that range only, no matter what range the analyzer is on. If the analyzer has
different linearizer coefficients for each range, or changes its gain between
ranges, the analog output may change value when a range is changed as it tracks
the new value of PVA calculated by the analyzer.
PVA
NGA2000 Reference
Rosemount Analytical Inc. A Division of Emerson Process Management