Emerson NGA2000 Reference Manual page 136

Reference Manual
748384-C
September 2003
CAL_OR_QC
Direction
Binding
Type
Value range
Units
Description
Usage
See also
CALSTATA
Direction
Binding
Type
Value range
Units
Description
Usage
See also
3-10 I/O Modules Variables
Output
None
2-element enumerated array
CAL; CHECK
None
AIO and ACAL only; Determines whether the module causes the analyzer to zero
or span, or simply measure the calibration gases without any calibration.
Element 1 determines this for the autocalibration function
Element 2 determines this for the manual calibration function.
This is a global variable that affects the entire auto- or manual Calibration
sequence. If set to CAL, the sequence will follow its programming (which may
include a check, rather than a calibration on one or more gases). If set to CHECK,
the sequence will run but without any calibration, no matter how the programming
has been set up.
AMS_SPANNED
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 1, this shows analyzer 1'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 SCAL module realizes that the analyzer zero has failed,
and it will abort the calibration cycle at this point.
CALSTATA
CALSTATB
CALSTATC
CALSTATD
NGA2000 Reference
Rosemount Analytical Inc. A Division of Emerson Process Management