R
Can anybody help me out in giving me some guidelines as to how to communicate with any Siemens PLC with a PC using VB6.0. Can anyone be kind enough to share with me some sample projects.
Hi RogerThere are a few options:
1. SIMATIC Computing which provides and ActiveX control and has methods for read/write data to any S7300/400 PLC via MPI,PROFIBUS or S7 TCP/IP (I have lots of sample source code for this)
2. SIMATIC NET OPC Server, whith this product you could communcicate to any S7300/S7400 PLC (you would have to turn your VB app into an OPC client which is simple enough with the Automation Interface.
3. There are some more obscure ways of doing this with winsock and a TCP/IP module on the PLC.
Personally I would recomend the SIMATIC Computing product due to it's low cost and ease of use.
Hope this helps,
Roger Hill