Rockwell Automation 1764-xxxx MICROLOGIX 1500 PROGRAMMABLE CONTROLLERS - Manual (Page 166)

Publication 1764-UM001B-EN-P - April 2002
Glossary 10
sourcing
A term used to describe current flow between two devices. A sourcing
device or circuit provides a power.
status
The condition of a circuit or system.
terminal
A point on an I/O module that external devices, such as a push button
or pilot light, are wired to.
throughput
The time between when an input turns on and a corresponding
output turns on or off. Throughput consists of input delays, program
scan, output delays, and overhead.
true
The status of an instruction that provides a continuous logical path on
a ladder rung.
upload
Data is transferred from the controller to a programming or storage
device.
watchdog timer
A timer that monitors a cyclical process and is cleared at the
conclusion of each cycle. If the watchdog runs past its programmed
time period, it causes a fault.
write
To send data to another device. For example, the processor writes
data to another device with a message write instruction.