Internal Memory In The Cpu Unit; Cpu Unit Memory Backup Structure - Omron SYSMAC CP Series User Manual

2 Internal Memory in the CPU Unit

2-1 Internal Memory in the CPU Unit
2-1-1

CPU Unit Memory Backup Structure

The internal memory in the CPU Unit consists of built-in RAM, built-in non-volatile RAM and built-in
Flash Memory. The built-in RAM and built-in non-volatile RAM are used as execution memory and the
built-in Flash Memory is used as backup memory.
Built-in Flash Memory
(Retained when the power
supply is interrupted)
Backup Memory
Source and Comment Areas
Built-in RAM
The built-in RAM is the execution memory for the CPU Unit.
The user program and parameters are stored in the built-in RAM.
Data is unstable when the power supply is interrupted.
Build-in Non-volatile RAM
The built-in non-volatile RAM is the execution memory for the CPU Unit. It is used to retain the data
when the power supply is interrupted.
I/O memory is stored in the built-in non-volatile RAM.
Data Memory Area (D), Holding Area (H) and Counter Area (C) are retained even if the power supply is
interrupted with no battery installed.
2-2
User Program Area
FB Program Area
(Backup)
Parameter
PLC Setup
Routing Table
IP Router Table
IP Address Table
(Backup)
Backup using bit in Auxiliary Area
DM Area
(Backup)
DM Area data restore at startup
CPU Unit
(Not retained when the power
supply is interrupted)
Execution Memory
User Program Area
Automatic backup
FB Program Area
Restore at startup
Automatic backup
Restore at startup
Built-in Non-volatile RAM
(Retained when the power
supply is interrupted)
Execution Memory
I/O Memory Areas
CP2E CPU Unit Software User's Manual(W614)
Built-in RAM
Parameter
DM Area