Panasonic FP-M Hardware Manual page 244

8-13. Terminology
I/O:
I/O update:
ladder diagram:
LCD:
leading edge differential:
Least Significant Bit (LSB):
Least Significant Digit (LSD):
LED:
malfunction:
Master Control Relay:
MEWTOCOL-COM:
modem:
Most Significant Bit (MSB):
Most Significant Digit (MSD):
multidrop link:
noise:
non-hold:
normally-closed contact:
normally-open contact:
offline:
online:
overflow:
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Abbreviation of Input/Output.
Taking the input data at the input interface into the memory for program
execution and outputting the result of program execution to the output
interface.
A standard for representing relay-logic systems.
Abbreviation for Liquid Crystal Display.
A programming technique to operate a bit only for one scan at the moment
its input condition turns ON from the OFF state.
The bit which represents the smallest value in a byte, word, or double-word.
The digit which represents the smallest value in a number.
Abbreviation for Light-Emitting Diode.
Incorrect function.
A relay which controls any series of programs with its operation. If the
master control relay is de-energized, all of the contacts and devices
controlled by the master control relay are de-energized.
A half-duplex communication protocol for FP series programmable
controllers that performs communication between a computer and
programmable controllers.
Abbreviation for MOdulator/DEModulator. The modem modulates digital
signals and transmits them through a telephone line.
The bit which represents the greatest value in a byte, word, or double-word.
The digit which represents the greatest value in a number.
A communication link in which one host can communicate with two or more
stations.
Random, unexpected electrical signals, that are caused by radio waves or by
electrical or magnetic fields.
The memory area whose contents will be lost or modified if operating power
is lost or if the mode of the programmable controller is changed from RUN
to PROG.
A contact which is closed when the coil of the relay is not activated.
A contact which is open when the coil of the relay is not activated.
Not being in continuous communication with another processor.
Being in continuous communication with another processor.
The act of exceeding the maximum limit in a registers capacity.