{}

Our Brands

Impact-Company-Logo-English Black-01-177x54

Welcome to the Schneider Electric Website

Welcome to our website.
Search FAQs
Why I do not succeed to operate a memory (%M and %MW) transfer from SD card to the M221 controller ?
A script command file named script.cmd, present into the SD card and having the line Download “/usr/mem" make possible a transfer into the M221 PLC of %MW and %M values (see Modicon M221 Logic Controller - Programming Guide, section Memory Management: Backing Up and Restoring Controller Memory).

-

Nevertheless, there are some conditions to make this process being successfully achieved :

1) The script.cmd file should not include any other transfer command like application transfer command (Download “/usr/app") or firmware download (‘Download "/sys/os") which can be present into a script file automatically generated when doing:
  • a clone operation (using an empty SD card)
  • a ‘Backup from Controller’ operation command (commissioning Tab in SoMachine/Machine Expert - Basic)

2) The SD card has to be inserted into the M221 controller while it is already powered as the script  "Download “/usr/mem”  is not executed during the boot up, but read and executed by the firmware only when detecting the event of inserting the SD card.

Note: Those two mandatory conditions have to be kept in mind also for a memory upload operation, managed by the command line Upload “/usr/mem”

Schneider Electric Singapore

Explore more
Range:
Articles that might be helpful Users group

Discuss this topic with experts

Visit our Community for first-hand insights from experts and peers on this topic and more.
Explore more
Range: