Omron CPM1

502
Glossary
NC input An input that is normally closed, i.e., the input signal is considered to be present
when the circuit connected to the input opens.
negative delay A delay set for a data trace in which recording data begins before the trace signal
by a specified amount.
nesting Programming one loop within another loop, programming a call to a subroutine
within another subroutine, or programming one jump within another.
NO input An input that is normally open, i.e., the input signal is considered to be present
when the circuit connected to the input closes.
noise interference Disturbances in signals caused by electrical noise.
nonfatal 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 op-
erand 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 de-
vice 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 de-
vice or PC) and the time when the signal reaches a state readable as an ON sig-
nal 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 link See 1:1 link.
online edit The process of changed the program directly in the PC from a Programming De-
vice. Online editing is possible in PROGRAM or MONITOR mode. In MONITOR
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.