I'm programming a Siemens S5 application (more of a SCADA) and I can communicate with the PLC through the built in serial port on my PC with no problems. Yet, and because this is an application to be used in a laptop with no Serial Port, I need to put it to work with a Serial to USB converter.
And this is where I got stuck! :(
I can't seem to communicate with the PLC. When I try the connectPLC() I get the -21 error.
What could be the problem? Has anyone tried these converters with libnodave before?
I'm programming in VB.net on a Windows XP Professional SP2 PC. :\
Thanx in advance for any help.
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Hi,
I've never used S5 with libnodave but I know that is very difficult to communicate with S5 over USB-rs232 converter using native program (siemens).
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Hi,
I'm programming a Siemens S5 application (more of a SCADA) and I can communicate with the PLC through the built in serial port on my PC with no problems. Yet, and because this is an application to be used in a laptop with no Serial Port, I need to put it to work with a Serial to USB converter.
And this is where I got stuck! :(
I can't seem to communicate with the PLC. When I try the connectPLC() I get the -21 error.
What could be the problem? Has anyone tried these converters with libnodave before?
I'm programming in VB.net on a Windows XP Professional SP2 PC. :\
Thanx in advance for any help.
Hi,
I've never used S5 with libnodave but I know that is very difficult to communicate with S5 over USB-rs232 converter using native program (siemens).