-
the part of a total system memory
devoted to storing the application program and its associated data.
Application memory
-
the part of the processor's memory, containing
I/O values and files, where data is monitored, manipulated, and changed for
control purposes.
Data table
-
the type
of nonvolatile, programmable, read only memory that can be erased completely by
applying the proper voltage to the memory chip.
Electrically alterable read-only memory (EAROM)
-
a type of nonvolatile, programmable, read-only memory that can be erased by
electrical pulses.
Electrically erasable programmable read-only memory (EEPROM)
-
a type of
nonvolatile, programmable, read-only memory that can be erased with ultraviolet
light.
Erasable programmable read-only memory (EPROM)
-
the part of the system memory that
permanently store system’s supervisory programs, as well as instruction
software; not accessible to the user.
Executive memory
-
the area of a PLC’s memory where information
about the status of input devices and stored.
Input table
-
the part of the programmable controller that stores
data, instructions, and the control program either temporarily or semi-permanently.
Memory
-
a diagram showing the system's memory
addresses, as well as which programs and data are assigned to each section of
memory.
Memory map
-
a type of memory whose contents are not
lost or disturbed if operating power is lost.
Nonvolatile memory
-
the area of a PLCs memory where information
about the status of output devices stored.
Output table
-
a read only memory
that can be programmed once and never altered again.
Programmable read-only memory (PROM)
-
a volatile, alterable memory
that provides storage for the application program and data.
Random-access memory (RAM)
-
a type of memory that permanently
stores and unalterable program or set of instructions.
Read-only memory (ROM) –
-
a temporary storage area used by the
CPU to store a relatively small amount of data used for interim calculations or
control.
Scratch pad memory –
-
the area of a PLCs memory that stores blocks
of input/output data, as well as data about the status of internal bits.
Storage area –
-
the memory section where the
application control program is stored.
User program memory –
-
a type of memory whose contents are
irretrievable after operating power is lost.
Volatile memory –
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