Omron CP1H CPU UNITS - PROGRAMMING 05-2007, Operation Manual

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Memory Cassette Functions
Section 6-5
2. Set IOM Hold Bit Status at Startup and Forced Status Hold Bit Status at
Startup to Clear (OFF) .
3. Set Read DM from flash memory to Read . (Only when DM initial values
have been saved as described above.)
!Caution
The CP1H CPU Units automatically back up the user program and parameter
data to flash memory when these are written to the CPU Unit. Also, the CX-
Programmer can be used to save all of the data in the DM Area to the flash
memory for use as initial values when the power supply is turned ON. Neither
of these functions saves the I/O memory data (including HR Area data,
counter PVs and Completion Flags, and DM Area data other than initial val-
ues). The HR Area data, counter PVs and Completion Flags, and DM Area
data other than initial values are held during power interruptions with a bat-
tery. If there is a battery error, the contents of these areas may not be accu-
rate after a power interruption. If HR Area data, counter PVs and Completion
Flags, and DM Area data other than initial values are used to control external
outputs, prevent inappropriate outputs from being made whenever the Battery
Error Flag (A402.04) is ON.
6-5 Memory Cassette Functions
6-5-1 Overview
CP1H CPU Units have Memory Cassette functions that enable data in the
CPU Unit to be stored on and read from a special CP1W-ME05M Memory
Cassette. These functions can be used for the following applications.
• Copying data to other CPU Units to produce duplicate devices.
• Backing up data in case the CPU Unit needs to be replaced due to any
malfunction.
• Writing and updating data when existing device versions are upgraded.
Memory Cassette
Specifications
Use the following Memory Cassette.
Data that Can be
Stored on a Memory
Cassette
The following data can be stored on a Memory Cassette.
Model Specifications
CP1W-ME05M • Memory size 512 Kwords
• Storage capacity The following CPU Unit data (for each Unit)
• User programs
• Parameters
• Comment memory
• Function Block (FB) sources
• DM initial values in the built-in flash memory
• DM in RAM
• Write method Operations from the CX-Programmer
• Read method Powering up with DIP switch pin SW2 set to
ON, or operations from the CX-Programmer
Data stored on Memory Cassette Location in CPU Unit
User programs Built-in RAM, built-in flash
memory (User Program Area)
Parameters PLC Setup, CPU Bus Unit set-
tings, routing tables Built-in RAM, built-in flash
memory (Parameter Area)