Remote control for 3 phase inverter.

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Len,

One of the classic examples of the science of Ergonomics; very well documented by K.F.H. Murrell ... The problem with ships [and with power stations, etc.] is that some controls are valves for liquid, or steam, or gas, or vacuum, which [just like the conventional water tap] increase flow when turned anti-clockwise. Murrell realised that, when abstracted to a control panel, these "taps" are better treated as "knobs" ... meaning that all rotary controls are arranged to increase by clockwise rotation.

In emergency situations, people revert to instinct when turning knobs; and experiments showed that instinct was to turn knobs anticlockwise to decrease [i.e. to make safe]

... of course; the fun starts when either (a) it is "evident" that a particular control is a tap/valve or, (b) when the "make safe" requirement is to increase something.

MichaelG.

Edited By Michael Gilligan on 23/06/2013 07:41:35

I now have a fully working remote pendant with the Jaguar Cub.

It turned out that I hadn't programmed F02 to 1, but it was still obeying external FWD/REV commands!

I programmed F02 and now it works, including jog and e-stop.

A few notes:

You can use a changeover switch to switch the run button between FWD and REV, rather than having two start buttons.

The stop button must interrupt the +24V/PLC supply to the run/jog buttons, otherwise the motor will run when the start button is pushed even though the stop circuit is broken, though it will stop when the start button is released - this is not good.

Default jog speed is zero so it won't work until you enter a jog speed. X2 is preset to operate as a jog control.

Now I just need to fit all this gubbins to the lathe.

Neil