Omron CPM1A operation manual Not, Off

	Glossary
non-fatal error	A hardware or software error that produces a warning but does not stop the PC
	from operating.
normal condition	See normally open condition.
normally closed condition	A condition that produces an ON execution condition when the bit assigned to it
	is OFF, and an OFF execution condition when the bit assigned to it is ON.
normally open condition	A condition that produces an ON execution condition when the bit assigned to it
	is ON, and an OFF execution condition when the bit assigned to it is OFF.
NOT	A logic operation which inverts the status of the operand. For example, AND
	NOT indicates an AND operation with the opposite of the actual status of the
	operand bit.
OFF	The status of an input or output when a signal is said not to be present. The OFF
	state is generally represented by a low voltage or by non-conductivity, but can be
	defined as the opposite of either.
OFF delay	The delay between the time when a signal is switched OFF (e.g., by an input
	device or PC) and the time when the signal reaches a state readable as an OFF
	signal (i.e., as no signal) by a receiving party (e.g., output device or PC).
offset	A positive or negative value added to a base value such as an address to specify
	a desired value.
ON	The status of an input or output when a signal is said to be present. The ON state
	is generally represented by a high voltage or by conductivity, but can be defined
	as the opposite of either.
ON delay	The delay between the time when an ON signal is initiated (e.g., by an input
	device or PC) and the time when the signal reaches a state readable as an ON
	signal by a receiving party (e.g., output device or PC).
one-shot bit	A bit that is turned ON or OFF for a specified interval of time which is longer than
	one scan.
One-to-one PC Link	See 1:1 PC Link.
online edit	The process of changed the program directly in the PC from a Programming
	Device. Online editing is possible in PROGRAM or MONITOR mode. In MON-
	ITOR mode, the program can actually be changed while it is being
operand	The values designated as the data to be used for an instruction. An operand can
	be input as a constant expressing the actual numeric value to be used or as an
	address to express the location in memory of the data to be used.
operand bit	A bit designated as an operand for an instruction.
operand word	A word designated as an operand for an instruction.
operating modes	One of three PC modes: PROGRAM mode, MONITOR mode, and RUN mode.
operating error	An error that occurs during actual PC operation as opposed to an initialization
	error, which occurs before actual operations can begin.
OR	A logic operation whereby the result is true if either of two premises is true, or if
	both are true. In ladder-diagram programming the premises are usually ON/OFF
	states of bits or the logical combination of such states called execution condi-
	tions.
output	The signal sent from the PC to an external device. The term output is often used
	abstractly or collectively to refer to outgoing signals.

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