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User Manual – JCM-501-E01
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8.6 Storage options - Overview
The JCM-501-E01 features several types of program and data memory. There is
volatile and non-volatile memory. Volatile memory loses its content at switching
off. Non-volatile memory keeps its content even when the power supply is off.
This type of memory is also referred to as remanent memory, and it is located di-
rectly in the CPU or in separate I/O modules.
This chapter gives an overview of the available memory.
8.6.1 Operating system memory
The OS is stored to a non-volatile flash memory in the CPU. It boots immediately
after the device was switched on.
Features
■
Internal flash memory for storing OS data
■
Internal volatile RAM for storing OS data
Access
■
The user is not allowed to directly access the OS memory.
■
The operating system can be changed via an update.
8.6.2 File system memory
The file system memory is for storing data and program files.
Properties
■
Non-volatile
■
Size of the internal flash disk: 368 MB
Type of access
■
By operating system
■
By JetSym
■
By means of file commands from within the application program
8.6.3 Application program memory
By default, the application program is uploaded from JetSym to the JCM-501-E01
and is stored there.
Properties
■
Stored as file within the file system
■
Default directory
\app\program name
■
Files may also be stored to other directories (or USB flash drive)
Type of access
■
By operating system
■
By JetSym
■
By means of file commands from within the application program
