MSD043A1XXV Panasonic AC Servo Driver 400w - MB3 connection help

[Doddy]

Your diagram is a little confusing - thoughI think I know what you're trying to do.

It's F1 Qualifying on TV just now - and hour for me to snooze, I'll sketch something for you after that.

The indicated dotted ellipse - that's indicating a screen on the cable to reduce EMI (often a braided sheaf under the first layer of insulation).

The question on pin 12 - "Equiv to EN on servos" - kinda - but it's more the command to the servo controller to start/enable the servo. It looks to be pulled low to be active. Page 11 indicates the internal equivalent circuit - another example where you can use the open collector output from the MB03 directly (no need for a relay).

EDIT:

This is how I'd be connecting the MB3 to the servo controller...



So, you have a common 24V supply to the Servo controller and the MB3 card. That's all good. The internal circuitry of the Servo controller, as page 11 ...



Shows that pin 12 is connected to the side of the internal Opto isolator that needs to sink to ground to enable it - that's the signal path that you're providing with the MB3.

So far you've discussed the servo enable line, step and direction signals, there's every chance you'll have to look at some of the other inputs as well, or you may need to ground them (read up about each of them).