What is the difference between Siemens S7-200 series PLC & S7-200CN series PLC ? Is it possible to work with standard Step7 Microwin ver4.0 for S7-200CN series PLC ?
The CN (CHINA MODULE) versions of the S7-200 family does not have any additional functionnalities, compared to "regular" S7-200 CPUs; they are simply dedicated to the chinese market, using chinese as a programming and comment language.
You cannot setup the CN versions as a Profibus-DP master, any more than you can with regular S7-200s.