|Home | Articles | Forum | Glossary | Books|
octal numbering system A base 8 numbering system which uses only the digits 0-7.
off A term used to designate the 0 state of a bit; or the inoperative state of a device.
on A term used to designate the 1 state of a bit; the operative state of a device; the state of a switch or circuit that is closed.
one-shot A programming technique that sets a bit to the on state for only one program scan.
on line (online) Refers to equipment or devices that are in direct interaction communications. For example, connecting a programming computer to a PLC to make changes in the PLC program.
op amp An operational amplifier. A high-gain stable linear dc amplifier that is designed to be used with external circuit elements.
optocoupler A light-emitting diode and a light-detecting device sealed together in an integrated package. The input circuit and Output circuit are electrically isolated since they are only connected with light.
output device Devices such as a solenoid or motor starter that are connected to the output circuit of a programmable controller, robot CNC machine.
This page was last updated: Tuesday, August 19, 2008 23:43