Emerson NGA2000 Reference Manual page 97

NGA2000 Reference
LONPVUPDATE
Direction
Binding
Type
Value range
Units
Description
Usage
See also
MAXRANGE
Direction
Binding
Type
Value range
Units
Description
Usage
See also
MCHECKTIME
Direction
Binding
Type
Value range
Units
Description
Usage
See also
MEAS_STAT
Direction
Binding
Type
Value range
Units
Description
Usage
See also
Rosemount Analytical Inc. A Division of Emerson Process Management
Bidirectional
LONPVUPDATE
Enumerated
ASAP; 10 per second; 1 per second; normally 10 per second, though systems
should be set to 1 per second.
None
The frequency with which the main reading variable PVA is updated over the
network.
The network is capable of supporting about 250 variable updates per second. If this
value is exceeded, collisions occur and the overall response becomes degraded. In
this case, menus are not easily accessed, and the editing of variables does not
appear to work reliably. PC software also becomes degraded. This can be
ameliorated by reducing the update rate of the primary variable using
LONPVUPDATE. The system response time is not directly affected, though of
course the output will appear to step if the Once per second value is used.
Other LINxxxxxxxx variables
Analyzer: bidirectional; 1/0 module: Input
MAXRANGE
Floating point
0 - 1,000,000
ppm
The maximum range that the analyzer physics is capable of measuring.
This value is set in the manufacturing data screens, and is used to limit the range
high end selection in the expert set up screens. This value should only be changed if
the physics is changed so as to support the new value.
This is an input to the 1/0 module for informational purposes only.
MINRANGE
RNGHI
Output
None
Integer
0-600
Seconds
NDIR only; the remaining time during the present phase of a modulation check.
Used to indicate how much longer any given phase of the modulation check will last.
Bidirectional
MEAS_STAT
Enumerated
READY; MEASURING; ABORTED; WRONG RANGE!; TIMED OUT
None
Reports what the analyzer is currently doing - or has done - in the self linearization
process.
Used to give feedback to the user.
Reference Manual
748384-C
September 2003
Analyzer Variables 2-35