GE Industrial Solutions Control System Toolbox For an AV-300i Version 2 Drive - Manual (Page 70)

G-2 •••• Glossary of Terms GEH-6412 Toolbox for AV-300i Version 2 Drive
BIOS
Basic input/output system. Performs the boot-up, which includes hardware self-tests
and the file system loader. The BIOS is stored in EEPROM and is not loaded from
the toolbox.
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
toolbox, it is a data type for logical signals.
bus
An electrical path for transmitting and receiving data.
bumpless
No disrupt to the control when downloading.
byte
A group of eight binary digits (bits) operated on a single unit.
CMOS
Complementary metal-oxide semiconductor.
collection
A group of signals found on the same network. The Trend Recorder can be
configured by adding collections.
COM port
Serial controller communication ports (two). COM1 is reserved for diagnostic
information and the Serial Loader. COM2 is used for I/O communication
configure
To select specific options, either by setting the location of hardware jumpers or
loading software parameters into memory.
datagrams
Messages sent from the controller to I/O blocks over the Genius network.