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Glossary
G-2
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B
b
Bits
background polling
A polled I/O communication scheme in which all polled slaves are grouped
into two different communication rates: a foreground rate and a slower
background rate.
into two different communication rates: a foreground rate and a slower
background rate.
bit strobed I/O
Master/slave I/O connection in which the master broadcasts a single strobe
command to all strobed slaves then receives a strobe response from each
strobed slave.
command to all strobed slaves then receives a strobe response from each
strobed slave.
C
CAN
Controller Area Network
change-of-state I/O
Master/slave I/O connection which is similar to cyclic I/O but data can be
sent when a change in the data is detected.
sent when a change in the data is detected.
class
A classification of things with similar qualities.
client
In explicit messaging connections, the client is the device requesting
execution of the service.
execution of the service.
common services
Services defined by the DeviceNet specification such that they are largely
interoperable.
interoperable.
connection
An association between two or more devices on a network that describes
when and how data is transferred.
when and how data is transferred.
controller
A device that receives data from sensors and sends data to actuators to hold
one or more external, real-world variables at a certain level or condition.
A thermostat is a simple example of a controller.
one or more external, real-world variables at a certain level or condition.
A thermostat is a simple example of a controller.
COS I/O See change-of-state I/O.
cyclic I/O
Master/slave I/O connection in which the slave (or master) sends data at a
fixed interval.
fixed interval.