7 File Operations
7-2
CJ2 CPU Unit Software User’s Manual
7-1 File Memory
File memory can be used to store files in CJ-series PLCs. The two following types of file memory are
used.
• Memory Cards
• A specified range in the EM Area called EM file memory
With the CJ-series PLCs, Memory Cards and a specified range of the EM Area can be used as memory
to store files. Either can be used to save the entire user program, I/O memory, and parameter areas as
files.
7-1-1 Types of File Memory
Category Memory type Memory capacity Storable file types
Memory Card Flash memory HMC-EF183: 128 Mbytes
HMC-EF283: 256 Mbytes
HMC-EF583: 512 Mbytes
• Program files
• Comment files
• Program index files
• Symbol table files
• Parameter files
• Unit and Board backup files
(Memory Card only)
Built-in RAM
(EM File Memory)
RAM EM Area capacity up to 13 banks from
bank specified in EM Area to last bank
in EM Area
CPU Unit
Memory
Card
File
EM Area
EM file memory
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