Control.com - Nerds in Control

I have a CompactLogix L35E. It has a Prosoft MVI69 card in it. According to the SMC documentation, it can talk TCP/IP, Modbus, etc... I found a configuration bulletin for a Prosoft to Yaskawa VFD interface.

Spoke with Yaskawa tech support and they didn't have a lot to add besides that VFD setup might work, or that I might not need the Prosoft module if I can just have the PLC speak straight ethernet to the SMC. That confused me. A lot of things confuse me.

Anybody familiar with the SMC series that can shed any light on what the best way to send software signal/receive a software signal?

Thanks in advance for any help.

I have used an SMC-3010 before. I bought it because it was adverstised as being Modbus. They call it Modbus, and apparantly it works OK talking to other SMC controller using "Modbus", but it in no way is the standard Modbus. I ended up using standard Ethernet to communicate with a PC. Contact me if you wish for further details, if I can remember them: brian(at)bjbeng.com