Chapter 5 Deployment CPU 21x-2BT02 with H1 / TCP/IP Manual VIPA CPU 21x
5-22 HB103E - Rev. 05/45
Transfer MMC
→
CPU
The transfer of the user application from MMC into the CPU always
happens after an OVERALL_RESET. During the write process, the yellow
"MMC"-LED of the CPU is blinking.
If there is no valid user application on the plugged MMC or if the transfer
fails, the CPU executes an OVERALL_RESET and the STOP-LED blinks
three times.
Monitor memory size of the MMC
To monitor the memory space of the MMC, you select PLC > Module
Information in the SIMATIC manager from Siemens. Via the register
"Memory" you reach the window that shows the current memory expansion
of the CPU.
Access to the internal flash
Like shown further above, the content of the battery buffered RAM is
transferred to the MMC and into the internal flash via a write command.
The write command is started in the hardware configurator from Siemens
via PLC > Copy RAM to ROM.
A read access to the internal flash only takes place at empty buffer battery
when no MMC is plugged-in.
Note!
If the user application is larger than the user memory in the CPU, the
content of the MMC is not transferred to the CPU.
Please execute a compression of the file before you transfer it for this
doesn't happen automatically.
... continue to b)
Transfer via MMC
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