Weiler DZ26 Millturn Conversion

The 7I77/7I77D have no flyback diodes but they do have Zener --> gate
slew rate limiters. These dissipate the inductive energy in the output MOSFETS
This is only good up to 60 mA or so. If the solenoids have more that 60 mA  current draw,
they must have flyback diodes (and they must draw no more than 350 mA)

Thank you, i checked on the machine and you are right, they have integrated flyback diodes. I will check wether they draw more than 350mA (i can't imagine they do)

Another question:
Since i have the full documentation fory old siemens 810t control i can check all sorts of servo calibration values from the original machine data. Certain 8-bit codes can be decoded using the docs. You i try using that method or would you do it from scratch as it it is a new machine?

I better don't say it out loud, but it all looks pretty straightforward to me

The I/O board is almost the same as the 7i77, theoretically i can connect 24V power, servo control and all IOs with original wiring and get straight into configuration mode.

Reality check incoming....