7i77 -> Huanyang

Do you have a spare analogue output from the 7i77 to control the VFD speed?

Alternatively, driving the HY VFDs with Modbus is pretty trivial, though not hard-realtime as it has to pass through USB. (typically)

yeah got plenty room. planning on using tb5 ground and aout5. this seems logical to me.....Do I need any other signals?

cmtunnel wrote: yeah got plenty room. planning on using tb5 ground and aout5. this seems logical to me.....Do I need any other signals?

Another GPIO for a direction signal, as a minimum, unless you don't need to reverse the spindle. (and it is entirely possible that you don't)

Just fwd is all I need. How about the power up of the vfd as I mentioned above. I have it set so that when you hit the spindle button in axis the relay gives power to the vfd. Is this correct or should there be some kind of enable like on the servo drives.....I'm worried that the way I have it now the entire vfd unit will be powering on and off alot. Should I use the enables on tb5 to handle this somehow?

My VFDs come on with the main power. And stay on if the machine is on.

Estop kills their power feed, but otherwise I trust them to only turn the spindle when enabled.

Ok I'm assuming now that I can run a wire from tb5 ena5+ to the forward pin on the vfd?? Also, I am guessing the driver that is mentioned is not needed for this method??

A single SPDT relay can be used this way:

7I77 ENA5- to GND
7I77 ENA5+ to relay common
relay NC to FOR
relay NO to REV
relay coil to 7I77 output (DIR)

using the fwd only for a cnc router. can I do: 7i77 ena5+ to FOR, 7i77 ground to DCM
7i77 AOUT5 to V1, 7i77 ground to ACM

Almost but you need to connect DCM to ena5- instead of 7I77 GND
(The enaN outputs are isolated)

moving on to the config.....I largely copied the configs attached above but it's not working yet. could someone take a peek please.

There are several bugs in that (old) version of pncconf
net spindle-vel-cmd-abs => hm2_5i25.0.7i77.0.1.analogout5 !!!! wrong
SB
net spindle-vel-cmd-rpm-abs => hm2_5i25.0.7i77.0.1.analogout5

net machine-is-enabled => hm2_5i25.0.7i77.0.1.spinena !!!! OWW
SB
net spindle-on <= motion.spindle-on => hm2_5i25.0.7i77.0.1.spinena