Omron CX-SUPERVISOR - V2.0, Руководство пользователя

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OMRON GLOSSARY OF TERMS - CX-Supervisor User Manual
Release 2.0 Page 331
DBCS DBCS stands for Double Byte Character Set and is a Microsoft extension
of ASCII which uses 2 bytes (16 bits) to define character codes. With this
larger range it can include accented characters, extended ASCII characters,
Nordic characters and symbols.
DCOM DCOM is a distributed version of COM that allows components on
different PCs to interact over a network.
DDE Dynamic Data Exchange. A channel through which correctly prepared
programs can actively exchange data and controls other applications within
Microsoft Windows. DDE technology was notoriously unstable and was
replaced with OLE technology.
See also Item, Server, server application and Topic.
Development Environment SCADA applications are created and tested using the development
environment within CX-Supervisor. On completion, the finished
application can be delivered as a final customer application to be run by
the run-time environment.
DLL Dynamic Link Library. A program file that although cannot be run stand-
alone as an executable, can be utilised by one or more applications or
programs as a common service. DLL files have a *.DLL extension.
DLL’s comprise a number of stand-alone functions. In CX-Supervisor, a
DLL containing icons can be accessed to represent the display part of an
OLE object. One such DLL, ‘MORICONS.DLL’, is provided in the
standard Microsoft Windows installation.
Download A recipe is downloaded during runtime. This process involves identifying
the appropriate recipe and executing the validation code, if any exists. The
download is complete when each ingredient has set its point to the target
value.
Executable A file that contains programs or commands of an application that can be
executed by a user or another application. Executable files have a *.EXE
file extension. CX-Supervisor provides two executable files, one for the
development environment (CXSUPERVISORDEV.EXE), and one for the
run-time environment (SCS.EXE).
Expressions In the CX-Supervisor script language, expressions are a construct for
computing a value from one or more operands. For instance, in the
example “
lift = rate
”, the expression is “
rate
” where the result yielded from the expression is used for the value
of “
lift
”.
Outside of the script language, expressions consisting of operators and
operands can be used to control objects, through actions.
Field association A field association enables a link to be made between a CX-Supervisor
Point and a particular field (i.e. column) within a recordset.