PART 2: CX-Server PLC Tools
OMRON GLOSSARY OF TERMS – CX-Server PLC Tools
CX-Server PLC Tools_ Page 177
IP Internet Protocol.
Item A unique name for a data item within a topic.
LAN Local Area Network.
Link Relay Area A common data area allowing the transfer of data between PLCs connected by a Data
Link; the information held in this area in the memory of each PLC is identical.
Link system A system that links PLCs together.
Link unit A unit which connects a device to the network.
Link A connection between two units established either by software or a hardware device.
Load Placing a program or data into an area of computer or PLC memory.
Local area network A network located within a limited area (normally the user’s premises).
Local network address The address of the network to which a PLC is connected.
Local network number The number of the unit connecting the PLC to the network.
Local table A table containing the details of the networks to which a PLC belongs.
LREAL LREAL (Double Floating Point) type is as the IEEE754 Double precision (1.7E
+308/-307) as defined by Microsoft®.
LSS A file format supported by the CX-Server Import tool.
Mailbox A communications protocol.
Mark parity The parity bit is always set to 1.
Master A controlling device which sends data and/or instructions to a slave device.
Mb Megabytes – A means of defining computer memory size.
Memory area Addressable area of storage space in a device.
Memory Card component This CX-Server component manages the file storage to and from PLC memory cards.
Memory Card Writer A device which writes data to a memory card.
Memory card A data storage medium which can hold both programs and data.
MHz Megahertz.
Micro host link A link to a ‘micro’ device acting as a host.
Microsoft Excel A spreadsheet application.
Microsoft Windows Explorer A file handling application part of the Microsoft Windows suite.
Microsoft Windows A windowing environment that is noted for its GUI, and for features such as multiple
typefaces, desk accessories (such as a clock, calculator, calendar and notepad), and the
capability of moving text and graphics from one application to another via a clipboard.
CX-Server runs only under Microsoft Windows. DDE functions communicating with
other applications supported by CX-Server use Microsoft Windows as a basis.
Modem A device with the ability to convert digital data from a computer into analogue form
and transmit it over a telecommunications line and also to convert received analogue
signals into digital form.
Monitor mode A PLC operational mode which allows the device, during normal execution, to review
the condition of the Data Link (including the PLCs/nodes on that link).
n A variable number.
Native data format The format in which data is handled by a communications protocol; for example,
ASCII or binary.
Network bridge A unit that connects two or more networks together.
Network parameters Network settings including information such as the maximum number of nodes
permitted on a network and the waiting times between transmissions.
Network Service Board An interface which connects devices (not PLCs) to the network.
Network 1. Part of the PLC configuration, based on the device type. The number of Networks
available is dependant on the device type.
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