Handling of HY VFD errors

[NB70]

Many thanks for the help. I've checked the manual & you're right its parameter PD052, it needs to be set to 3 for fault indication.
I want to be able to use the machine sometimes with the VFD turned off (for probing etc.).

• If the VFD's normally closed outputs (FA/FB) are still closed when the VFD is off I can connect these directly to my PNOZ safety relay. I should be able to check this with a multimeter.
• Otherwise my plan is to connect FB & FC to a separate relay (something like this?) and then connect that into the E-stop circuit from the PNOZ relay. Hopefully when the VFD faults, FB + FC switch on which opens the relay and triggers the E-stop.

[JAZZCNC]

Many thanks for the help. I've checked the manual & you're right its parameter PD052, it needs to be set to 3 for fault indication.
I want to be able to use the machine sometimes with the VFD turned off (for probing etc.).

• If the VFD's normally closed outputs (FA/FB) are still closed when the VFD is off I can connect these directly to my PNOZ safety relay. I should be able to check this with a multimeter.
• Otherwise my plan is to connect FB & FC to a separate relay (something like this?) and then connect that into the E-stop circuit from the PNOZ relay. Hopefully when the VFD faults, FB + FC switch on which opens the relay and triggers the E-stop.

Yes the NC contact is still closed when off, BUT, why would you turn the VFD off for probing.? If you are chasing safety then just put an interlock switch on the run wire.!