S7-200 Communication

[cltoh77 0]

Hi all, My project required collect data from S7-200 CPU226, initially going to write a VB program, but don't have the PPI Protocol . Anyone have the relevent info? As less than 20 words is collected per hour, I change to use freeport to send data to PC. My question is if set port 0 to freeport, do I need a 485 to 233 converter? Or I can use normal 232 cable? Regards, CL

[Crossbow 295]

If you set the port to Freeport, it's still RS485, so you would still use the programming cable with the RS485 to serial (or USB) electronics built in. Just connect the PLC programming cable and you should be all set. Freeport just has to do with the data packets sent, not the physical media.