Omron SYSMAC C20P Operation Manual page 203

output
output bit
output device
output point
output signal
overseeing
overwrite
PC
PC System
PCB
Peripheral Device
present value
printed circuit board
program
Programmable Controller
programmed alarm
programmed error
programmed message
Glossary
The signal sent from the PC to an external device. Output often is used ab-
stractly or collectively to refer to outgoing signals.
A bit in the IR area that is allocated to hold the status to be sent to an output
device.
An external device that receives a signal(s) from the PC System.
The point at which an output leaves the PC System. An output point physical-
ly corresponds to terminals or connector pin(s).
A change in the status of a connection leaving the PC. Generally an output
signal is said to exist when, for example, a connection point goes from low to
high voltage or from a nonconductive to a conductive state.
Part of the processing performed by the CPU that includes general tasks re-
quired to operate the PC.
Changing the content of a memory location so that the previous content is
lost.
An acronym for Programmable Controller.
All of the Units connected to the CPU Unit up to, but not including the I/O de-
vices. The limits of the PC System on the upper end is the PC and the pro-
gram in its CPU and on the lower end, I/O Units, an I/O Link Unit, etc.
An acronym for printed circuit board.
Devices connected to a PC System to aid in system operation. Peripheral
devices include printers, programming devices, external storage media, etc.
The current time left on a timer or the current count of a counter. Present val-
ue is abbreviated PV.
A board onto which electrical circuits are printed for mounting into a comput-
er or electrical device.
The list of instructions that tells the PC the sequence of control actions to be
carried out.
A computerized device that can accept inputs from external devices and gen-
erate outputs to external devices according to a program held in memory.
Programmable Controllers are used to automate control of external devices.
An alarm given as a result of execution of an instruction designed to gener-
ate the alarm in the program as opposed to one generated by the system.
An error arising as a result of execution of an instruction designed to gener-
ate the error in the program as opposed to one generated by the system.
A message generated as a result of execution of an instruction designed to
generate the message in the program as opposed to one generated by the
system.
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