Omron CPM1A Operation Manual page 189

non-fatal error
normal condition
normally closed condition
normally open condition
NOT
OFF
OFF delay
offset
ON
ON delay
one-shot bit
One-to-one PC Link
online edit
operand
operand bit
operand word
operating modes
operating error
OR
output
168
Glossary
A hardware or software error that produces a warning but does not stop the PC
from operating.
See normally open 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.
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.
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.
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.
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).
A positive or negative value added to a base value such as an address to specify
a desired value.
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.
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).
A bit that is turned ON or OFF for a specified interval of time which is longer than
one scan.
See 1:1 PC Link.
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
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.
A bit designated as an operand for an instruction.
A word designated as an operand for an instruction.
One of three PC modes: PROGRAM mode, MONITOR mode, and RUN mode.
An error that occurs during actual PC operation as opposed to an initialization
error, which occurs before actual operations can begin.
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.
The signal sent from the PC to an external device. The term output is often used
abstractly or collectively to refer to outgoing signals.