Inner Workings Of Cp1L; A-3-1 Inner Structure Of Cpu Units - Omron CP1L CPU Getting Started Manual

A-3 Inner Workings of CP1L
This section briefly explains the inner structure, functions, and internal operation flow of CP1L CPU units.

A-3-1 Inner Structure of CPU Units

The inner structure of a CP1L CPU unit is shown below.
"Write" operation from
CX-Programmer
(1) Transfer of programs and parameter data
• Data in RAM is automatically backed up to the built-in flash memory when
• When the unit is powered ON, data is transferred from the built-in flash
(2) Transfer of DM defaults data
• When initiated from CX-Programmer, DM defaults are transferred from RAM
• According to PLC setup, DM defaults are transferred from the built-in flash
(3) Transfer of data between flash memory and memory cassette
• When initiated from CX-Programmer, data is transferred from RAM or the
• When the unit is powered ON, data is transferred from the memory cassette to
CPU unit
Analog adjuster
External analog
settings input
Auxiliary area
Parameters
(i.e. PLC settings)
changes are made, for example, from the CX-Programmer.
memory to RAM.
to the built-in flash memory.
memory to RAM when the unit is powered ON.
built-in flash memory to the memory cassette.
the built-in flash memory.
A-3 Inner Workings of CP1L
Built-in inputs
R AM
User program
1
4
Access
5
I/O memory
2
DM area
1
6
Built-in outputs
3
7
Flash memory
Memory cassette
User program
8
Comment
3
memory
3
FB program
memory
3
DM area
Parameters
(i.e. PLC settings)
3
SYSMAC CP1L Getting Started Guide
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