Emerson NGA2000 Reference Manual page 138

Reference Manual
748384-C
September 2003
CALSTATD
Direction
Binding
Type
Value range
Units
Description
Usage
See also
CONC_ALARM
Direction
Binding
Type
Value range
Units
Description
Usage
See also
CRANGEI
CRANGEI, CRANGEIA, CRANGEIB, CRANGEIC, CRANGEID
Direction
Binding
Type
Value range
Units
Description
Usage
See also
3-12 I/O Modules Variables
Input
CALSTAT
Enumerated type
READY; ZEROING - WAIT; SPANNING - WAIT.
None
SCAL only; shows present calibration status of associated analyzer.
Bound to the CALSTAT of analyzer 4, this shows analyzer 4's current calibration
status, and is used by the SCAL module as a signal as to what part of its sequence
to do next. For example, it updates AMFNO with a value meaning "Do a zero", and
then monitors CALSTATA(B, C or D) to see if the analyzer has both received the
message and is doing a zero. Once it has done, and CALSTAT is back to normal
again, it goes on to the span step. If the analyzer does not update CALSTAT with
its zeroing message, the S CAL module realizes that the analyzer zero has failed,
and it will abort the calibration cycle at this point.
CALSTATA
CALSTATB
CALSTATC
CALSTATD
output
None
Enumerated
None; HIGH ALARM; HIGH HIGH ALARM; LOW ALARM; LOW LOW ALARM.
None
Reports any concentration alarm detected.
This reports the any concentration alarm that has caused the appropriate relay to
change state. If there are two or more alarms, the more extreme of them will be
reported, e.g. if the module has two HIGH alarms and a HIGH-HIGH alarm, and all
three are in alarm, this variable will report a HIGH-HIGH alarm. Otherwise it will
report the latest alarm that occurred (if there are overlapping high and low alarms).
ALLVL
ALVAR
ALTYPE
Input
CRANGE
Enumerated
1; 2; 3; 4.
None
Tells the 1/0 module what the analyzer current range is.
SCAL only uses CRANGEIA etc. to bind to each of its analyzer modules.
The general range selection variable, set manually or automatically by 1/0 modules
of various types. Note that this is an enumerated type - its value is one less than
the range, i.e. a value of 0 refers to range 1, a value of 1 refers to range 2 etc.
CRANGEO
CRANGE (in Section 2)
NGA2000 Reference
Rosemount Analytical Inc. A Division of Emerson Process Management