Hi..

I have used USB to serial converter of locale make  for communication with PC to  CPU 224 CN but communication not done. what's problem ? 

it's compulsory  to use Siemens make PPI cable.???

help me...

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Split from S7 200 CPU 224 CN.

Hi,

Yes. You should use ppi or PC adapter or cp5711

Hello,

you can also look to this topic what describes maybe another solution, which settings must be also set:

https://support.industry.siemens.com/tf/us/en/posts/error-when-communicate-with-cpu-224xp-the-selected-devies-doesn-t-exist-or-is-not-supported-try-selecting-a-new-device/161082/?page=0&pageSize=10