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Communicating from VB to S7300 CPU

2/15/2007 3:20 PM	Rate (0)
Drew* Posts: 1 Rating: (0)	What do I need to communicate from a Visual Basic application and an S7300 CPU
Drew* Posts: 1 Rating: (0)
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2/15/2007 3:58 PM	Rate (0)
J_Bell Posts: 5822 Rating: (412)	Hi Drew, this depends on the Interface you want to use. -------------------------- If you want to use Ethernet you need. PC: Ethernet NIC. SIMATIC NET Softnet S7 Lean PLC Ethernet Interface, e.g. CP 343-1 Lean --------------------------- If you want to use PROFIBUS or MPI you need. PC: CP 5512 (PC Card)or CP 5611 (PCI) SIMATIC NET Softnet S7 for PROFIBUS PLC PROFIBUS Interface of the CPU (if available)or CP, e.g. CP 342-5 ------------------------------ That's it. [;)] Best regards J_Bell
J_Bell Posts: 5822 Rating: (412)
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2/19/2007 11:10 AM	Rate (0)
pippo Regular Member Joined: 2/19/2007 Last visit: 3/14/2025 Posts: 10 Rating: (0)	Hi, I already used Siemens libraries to get communication with S7-300 via VB. Even if they work and they are really stable, I have to say they are very slow and complicated to be used in a VB application and even more if you are not an expert programmer. I suggest you to try the "libnodave 0.8.1" free libraries just to evaluate something else. Pippo

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3/13/2007 8:41 PM	Rate (0)
DanielGuillize Posts: 10 Rating: (0)	You could use a "normal" TCP/IP programming to communicates with CP341 (Ethernet CP). "NORMAL" means communication based on sockets RFC791 / RFC793 (basic TCP/IP).
DanielGuillize Posts: 10 Rating: (0)
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3/14/2007 1:51 PM	Rate (0)
DanielGuillize Posts: 10 Rating: (0)	Sorry Drew, I would like to say CP343 (ethernet) not CP341. My finger is faster than my brain ...
DanielGuillize Posts: 10 Rating: (0)
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