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PART 3: CX-Server Runtime
OMRON
GLOSSARY OF TERMS – CX-Server Runtime
Revision 2.0
CX-Server Runtime_Page 87
GLOSSARY OF TERMS
Actual IO Table
The real hardware configuration of the PLC units and slots on power-up.
Address
A location in memory where data or programs are stored. It can also identify a
location of a node on a network.
Application
A software program that accomplishes a specific task. Examples of applications are
CX-Server, CX-Programmer, CX-Protocol and Microsoft Excel.
Baud rate
The speed of data transmission in terms of the number of bits per second that are
being sent.
BCD
Binary Coded Decimal.
Binary
A data format supported by CX-Server. A number system format to the base 2, i.e.
employing the digits 0 and 1.
Bit
A digit used in binary notation which can take the value 0 or 1. The value of a bit, or
combination of bits, can represent the status of a device or can be used in
programming.
Bus
A communications path along which data can be transmitted or received between the
units connected to it.
Command modifier
An optional part of an address string indicating the modification to be performed on
the data at that address (within PLC memory) when it is accessed.
Components
CX-Server is made up of six components accessible from an invoking application.
Controller Link
A network that can send and receive large data packets flexibly and easily among the
OMRON PLCs.
CPU type
The type of CPU available to a specific device, the amount of memory available to a
PLC varies according to the CPU involved.
CPU
Central Processing Unit.
CVSS
A file format supported by the CX-Server Import tool. CVSS has several file types
which have different information contained in them.
CX-Net Network Configuration tool
This CX-Server tool consists of a suite of programs allowing the management of
Routing Tables and Data Link Tables in OMRON PLCs.
CX-Server
An advanced communications management system for OMRON PLCs providing
facilities for software to maintain PLC device and address information and to
communicate with OMRON PLCs and their supported network types. CX-Server
supports CS1-series PLCs.
CX-Server Project
A definition of an OMRON PLC network configuration. It identifies all devices and
networks within a particular configuration including the areas of PLC memory
(points) that can be read from or written to.
Data area
An area of PLC memory allocated to the storage of data (not programs).
Data bits
Bits representing each character to be transmitted.
Data link
A software connection establishing common data areas between PLCs on a network
allowing data to be between these devices.
Data link table
A table of the common data memory areas used by the PLCs in a Data Link.
Data location
An area of memory identified by an address.
DDE
Dynamic Data Exchange. A channel through which correctly prepared programs can
actively exchange data and control other applications within Microsoft Windows. CX-
Server, through the use of the DDE Manager tool, allows extensive use of DDE
functionality.
See also Item, Server, server application and Topic.
DDE management library
A dynamic link library within Windows which allows dynamic data exchange to be
employed.
DDE Manager tool
A CX-Server tool for transferring data between PLCs and a client application using
DDE, for example Microsoft Excel.
DDEML
Dynamic Data Exchange Management Library.
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