Storage Options - Overview; Operating System Memory; File System Memory - Jetter JX3-BN-ETH User Manual

Jetter AG

7.7 Storage options - Overview

7.7.1 Operating system memory

Properties
Memory access

7.7.2 File system memory

Properties
Memory access
JX3-BN-ETH User Manual
The JX3-BN-ETH bus node features a data memory. This memory is located di-
rectly in the CPU or in separate memory or I/O modules.
There is, for example, 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.
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.
■ To modify the OS, it must be updated.
The file system memory is for storing data and program files.
■ Non-volatile
■ Slow access: Milliseconds up to seconds
■ Limited number of write/erase cycles: Approx. 1 million
■ Size of the internal flash disk: 4 MB
■ By operating system
■ By means of JetSym
■ Via FTP connection
■ By the e-mail client
■ Via a browser (via the HTTP server)
■ By means of file commands from within the application program
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