Rockwell Automation 1764-xxxx MICROLOGIX 1500 PROGRAMMABLE CONTROLLERS - Manual (Page 163)

Publication 1764-UM001B-EN-P - April 2002
Glossary 7
offset
A continuous deviation of a controlled variable from a fixed point.
off-state leakage current
When a mechanical switch is opened (off-state), no current flows
through the switch. Semiconductor switches and transient suppression
components which are sometimes used to protect switches, have a
small current flow when they are in the off state. This current is
referred to as the off-state leakage current. To ensure reliable
operation, the off-state leakage current rating must be less than the
minimum operating current rating of the device that is connected.
on-delay time
The ON delay time is a measure of the time required for the controller
logic to recognize that a signal has been presented at the input
terminal of the controller.
one shot
A programming technique that sets a bit ON or OFF for one program
scan.
online
When a device is scanning/controlling or when a programming device
is communicating with the controller.
operating voltage
For inputs, the voltage range needed for the input to be in the On
state. For outputs, the allowable range of user-supplied voltage.
output device
A device, such as a pilot light or a motor starter coil, that receives a
signal or command from the controller.
output scan
The controller turns on, off, or modifies the devices connected to the
output terminals.
PCCC
Programmable Controller Communications Commands