Operating System Memory; File System Memory; Application Program Memory; Flash Disk - Jetter JVM-104-O15 User Manual

Jetter AG

7.7.2 Operating system memory

Properties
Type of access

7.7.3 File system memory

Properties
Type of access

7.7.4 Application program memory

Properties
Type of access

7.7.5 Flash disk

Flash disk
Capacity
JVM-104-O15 User Manual
The OS is stored to a non-volatile flash memory in the CPU. Therefore, the OS
can be executed immediately after the device is powered up.
■ Internal flash memory for storing OS data
■ Internal volatile RAM for storing OS data
■ The user is not allowed to directly access the OS memory.
■ Changes to the OS can be made by means of an OS update.
The file system memory is for storing data and program files.
■ Non-volatile
■ Size of internal flash disk: 368 MByte
■ By operating system
■ By JetSym
■ By means of file commands from within the application program
By default, the application program is uploaded from JetSym to the JVM-104-O15
and is stored there.
■ Stored as file within the file system
■ Default directory \app\program name
■ Files may also be stored to other directories (or USB flash drive)
■ By operating system
■ By JetSym
■ By means of file commands from within the application program
Data can be stored directly on the flash disk. The following rules apply when us-
ing a flash disk:
■ Do not open more than 8 files at a time.
■ Separate directory names by a slash "/".
■ The properties of all created files hold their creation date and time as provided
by the controller.
■ Date, time, and file size are not available for all system files.
The following disk space is available to the user:
Parameter
Flash disk capacity,
total
Size of folder App (of the
a.m. capacity)
Size of folder Data (of the
a.m. capacity)
Tab. 39: Flash disk capacity
Value
512 MB
64 MByte
368 MByte
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