Glossary Of Terms; Geh-6721_Vol_I_Bp - GE Mark VIe System Manual

Glossary of Terms

Application code Software that controls the machines or processes, specific to the application.
Balance of Plant (BOP) Plant equipment other than the turbine that needs to be controlled.
Baud A unit of data transmission. Baud rate is the number of bits per second transmitted.
Bit Binary Digit. The smallest unit of memory used to store only one piece of information with two states, such as
One/Zero or On/Off. Data requiring more than two states, such as numerical values 000 to 999, requires multiple bits (see
Word).
Block Instruction blocks contain basic control functions, which are connected together during configuration to form the
required machine or process control. Blocks can perform math computations, sequencing, or continuous control. The toolbox
receives a description of the blocks from the block libraries.
Board Printed wiring board.
Boolean Digital statement that expresses a condition that is either True or False. In the ToolboxST application, it is a data
type for a logical variable.
Broadcast In computer networking broadcast is traffic that is simultaneously addressed to all computers connected to the
network.
Bus An electrical path for transmitting and receiving data.
Byte A group of binary digits (bits); a measure of data flow when bytes per second.
CIMPLICITY Operator interface software configurable for a wide variety of control applications.
Configure To select specific options, either by setting the location of hardware jumpers or loading software parameters
into memory.
Control Data Highway (CDH)
Redundant Ethernet communication network allows two separate controllers to
communicate with each other.
Cyclic Redundancy Check (CRC) Detects errors in Ethernet and other transmissions.
Data server A computer that gathers control data from input networks and makes the data available to computers on
output networks.
Device A configurable component of a process control system.
Distributed Control System (DCS) Control system, usually applied to control of boilers and other process equipment.
Ethernet LAN with a 10/100 M baud collision avoidance/collision detection system used to link one or more computers
together. Basis for TCP/IP and I/O services layers that conform to the IEEE 802.3 standard, developed by Xerox ® , DEC ® , and
Intel ® .
Ethernet Global Data (EGD) Control network and protocol for the controller. Devices share data through EGD
exchanges (pages).
EX2100e Excitation Control Latest version of GE generator exciter control; regulates the generator field current to
control the generator output voltage.
Fanned input An input to the terminal board that is connected to all three TMR I/O boards.

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Glossary of Terms 195
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