I/O Modules Variables; Introduction - Emerson NGA2000 Reference Manual

NGA2000 Reference
3-1

INTRODUCTION

1/0 modules that are built around the
Neuron 3150 microprocessor can only
support input and output variables, unlike
the analyzer modules which can also
support Bidirectional ones. Output variables
can be updated by the control module via
its menus, but not by a PC program using
the Echelon DDE server. The latter can
only change input variables.
This section describes 1/0 Module
variables. This description is taken from the
CALSTAT
CONTROL
GAS
GENERALSTATE
I_TIME
IOHOLDCAL
MAXRANGE
MINRANGE
OPSTATUS
PROCESS
ACFN
Direction
Binding
Type
Value range
Units
Description
Usage
See also
Rosemount Analytical Inc. A Division of Emerson Process Management
SECTION 3

I/O MODULES VARIABLES

PVACEMS
PVU
RNGHI
RNGLO
SVCONT
SVNAME
TAG
TIME_LEFT
VALIDITY
Input
ACFN
Integer
0 NO operation;
1 Start an autocalibration cycle;
2 Start a manual calibration cycle
127 Abort present cycle.
None
ACAL; SCAL only; a control variable for the autocal modules.
May be used to initiate a manual cycle as programmed, a full autocalibration cycle
or to abort a current cycle.
AMFN in the analyzer list
"CSV" files that are used. to build the
software for each NGA module, and where
conflicts exist, the "CSV' file takes
precedence. In this file the acronyms AIO,
ACAL and SCAL refer to the analog output/
three alarm module, the single analyzer
autocalibration module and the system
autocalibration module respectively.
These variables are defined in the analyzer
section and can be used in the 1/0 module:
Reference Manual
748384-C
September 2003
I/O Modules Variables 3-1