Term. asynchronous
The transmission of data between a transmitting and a receiving device
occurs as a series of zeros and ones. For the data to be "read" correctly, the
receiving device must begin reading at the proper point in the series. In
asynchronous communication, this coordination is accomplished by having
each character surrounded by one or more start and stop bits which designate
the beginning and ending points of the information (see synchronous
(p. 530) ).
Indicates the sending and receiving devices are not synchronized using a
clock signal.
Term. AWG
AWG ("gauge") is the accepted unit when identifying wire diameters. Larger
AWG values indicate smaller cross-sectional diameter wires. Smaller AWG
values indicate large-diameter wires. For example, a 14 AWG wire is often
used for grounding because it can carry large currents. 22 AWG wire is often
used as sensor leads since only small currents are carried when measurements
are made.
Term. baud rate
The rate at which data are transmitted.
Term. beacon
A signal broadcasted to other devices in a PakBus® network to identify
"neighbor" devices. A beacon in a PakBus network ensures that all devices in
the network are aware of other devices that are viable. If configured to do so,
a clock-set command may be transmitted with the beacon. This function can
be used to synchronize the clocks of devices within the PakBus network. See
also PakBus
(p. 522) and neighbor device (p. 521).
Term. binary
Describes data represented by a series of zeros and ones. Also describes the
state of a switch, either being on or off.
Term. BOOL8
A one-byte data type that holds eight bits (0 or 1) of information. BOOL8
uses less space than the 32 bit BOOLEAN data type.
Term. boolean
Name given a function, the result of which is either true or false.
Term. boolean data type
Typically used for flags and to represent conditions or hardware that have
only two states (true or false) such as flags and control ports.
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