Been playing with it and it seems to work fine and dandy, does everything it says on the tin even if what it says on the tin needs a bit of translation

I bought the inverter and motor as a package, there is a bit of vibration if I crank it up past 90Hz but nothing to worry about, it doesn't start walking across the desk or anything like that. I'm replacing the hideously unbalanced 2hp Warco motor with a 1hp jobbie. (Even with the drive belt disconnected you can tell when Warco's motor is turned on using nothing more than the soles your feet through the concrete floor).

I wired in a 10k pot speed control and it winds up and down fine, next thing is remote buttons and then, eventually, RS232 so I can do those S & M commands.

When I asked for the RS232 protocol I got the distinct impression that I was the first. He eventually got a program from Teco which configured a motor for you, not exactly useful but I found what I needed in a help file.

The RS232 command protocol is not very well explained but luckily, right at the bottom, there is a worked example for speed control and it only took a couple of hours to work back from that and figure out what on earth they were doing, it is a bit weird.

If I'm right then the ASCII string
:0001010001FD<cr><lf>
will turn it on.

I'll let you know