Basic connection between PC and PLC


Thread Starter

Anuar Bin Mansor

Hi everybody,
Could anybody tell me how the connection works between the PC and the PLC. For example, I want to connect the PC with one type of machine that has moving parts. So I want to check the PLC data send to/from the PC/PLC. I use RS232 cable as a connection. My system is developed using VB3 or 4. What I remember, I can use some comms commands such as Comm1.Input or Comm1.Output.
Basically how the data transferred between these stations? I would appreciate if anybody can teach me or at least tell me where I can get those information in the net.
Thank you very much.

Anuar Mansor
Systems Analyst
MIS Department
TPC (Malaysia) Sdn. Bhd.