hi all

would like some ideas on the kind of executables that happen during pc <--> PLC data transfer for siemens LOGO PLC.

i would also like to know the data type store on the memory flash card for the siemens PLCs.

what kind of protocol does a simens logo PLC use?
is it profibus?

 

Hi,

The Siemens Logo! is marketed as a programmable relay, if you want a PLC look at the S7-200. As the communication happens over a serial link, why not use a 'sniffer' on /dev/ttyS0 (or whichever port you are using)

Data type is defined by the program software, If you read the EEProm to an empty data block, you will need to format it yourself.

Siemens Logo! does not support PROFIBUS, some models support ASI as a Slave

--
Marc Sinclair
http://www.germainesystems.co.uk