Emerson NGA2000 Reference Manual page 78

Reference Manual
748384-C
September 2003
CHOP_SPEED
Direction
Binding
Type
Value range
Units
Description
Usage
See also
CONTROL
Direction
Binding
Type
Value range
Units
Description
Usage
See also
CONV_BIAS
Direction
Binding
Type
Value range
Units
Description
Usage
See also
CONV_IGAIN
Direction
Binding
Type
Value range
Units
Description
Usage
See also
2-16 Analyzer Variables
Output
None
Floating point variable
5 ± 0.1
Hz
NDIR only; Chopper speed.
The rotation rate of the NDIR chopper motor. This must be 5 Hz ± 0.1 Hz. Anything
else indicates a physical problem.
Analyzer: bidirectional; 1/0 Module: input
CONTROL
Enumerated
LOCAL; REMOTE; AUTO
None
Determines range selection source.
Used in the analyzer to bind to the same variable in the I/O modules, so that the
latter may be controlled through the analyzer module's menus. LOCAL - only the
control module (or PC interface) may change the range; REMOTE - the 1/0 module's
digital inputs may change the range, though this can be overridden by the control
module; AUTO - the 1/0 module's automatic range change algorithm is enabled. In
this case if the user changes the range, the autorange change algorithm may well
immediately change it back.
CRANGE
Bidirectional
None
Floating point
50
°C
CLD only; bias temperature for the converter temperature control algorithm.
Used in the converter temperature control PID algorithm. This value should not be
adjusted.
CONV_IGAIN
CONV_PGAIN
CONV_SETP
Bidirectional
None
Floating point
0.003
None
CLD only; the integral "gain" for the converter temperature control algorithm.
Used in the control algorithm. This value has been experimentally determined, and
should not under any circumstances be changed.
CONV_BIAS
CONV_PGAIN
CONV_SETP
NGA2000 Reference
Rosemount Analytical Inc. A Division of Emerson Process Management