Technical information

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Memory structure
Memory cards
BMX RMS 008MP memory card (supplied as standard)
Modicon M340 processors are supplied as standard with an SD (Secure Digital) type
Flash memory card, BMX RMS 008MP. This card is intended for backing up the twotended for backing up the two
memory areas on the processor module's internal RAM:
Program, symbols and comments area, which contains the executable binary
code and the IEC source code of the application program for the program part
Constants area, which contains the constant data located by address
The data is backed up automatically by duplication, when the PLC is turned off.
Likewise, the restoration of the data is transparent to the user, on return of power.
Capacity of the “backup area” on the memory card: 1792 KB for the
BMX P34 1000
Standard processor, 3584 KB for BMX P34 2pppp Performance processors.
Processors with an integrated Ethernet port,ith an integrated Ethernet port, BMX P34 2020/20302,20302, have an
additional 2 MB memory area specifically formemory area specifically for “Standard Web services” (Transparent
Ready B10) (see page 3/14).
The
BMX RMS 008MP memory card is formatted by Schneider Electric and supplied
with each processor. It is referenced as a replacement part.
BMX RMS 008MPF/128MPF optional memory cards
Performance processors, BMX P34 2pppp, can take a BMX RMS 008MPF or
BMX RMS 128MPF optional memory card in place of the standard memory card. In
addition to the features of the standard card, this card also provides a “file storage
area” with a maximum capacity of 8 MB (for the BMX RMS 008MPF card) or
128 MB (for the BMX RMS 128MPF card).
This “file storage area” enables:file storage area” enables:
Any user-defined Word, Excel, PowerPoint or Acrobat Reader document (for
example, maintenance manuals, diagrams. etc.) to be received via FTP
Additional data (for example: production data, manufacturing recipes, etc.) to be
stored via EFB user function blocks
Unity Pro programming software helps the application designer manage the
structure and memory space occupation of the Modicon M340 automation platform.
Protecting the application
If necessary, it is possible to prohibit access to the application (in terms of reading
and modifying the program) by only loading the executable code in the PLC.
Additionally, a memory protection bit, set in configuration mode, is also available to
prevent any program modification (via the programming terminal or downloading).
From Unity Pro V5.0 on, the user has function blocks for protecting know-how by
means of a signature that can be loaded and stored in the M340 processor module's
Flash memory card (code not executed if the signature is not present).
Modifying the program in online mode
As with the Modicon Premium and Quantum platforms (with Unity Pro software), the
online program modification function is available on the Modicon M340 automation
platform with the option of adding or modifying the program code and data in
different places in the application in a single modification session (thus ensuring
modification is homogenous and consistent with the controlled process).
A dedicated memory area of the application internal RAM authorizes these program
modification or addition sessions while complying with the recommendation to
structure the application program in several, reasonably-sized sections.
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Modicon M340 automation
platform
Processor modules
I/O:
pages 2/2 and 2/14
Communication:
page 3/2
Software:
page 4/2
Ruggedized Modicon M340 modules:
page 6/2
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