Huanyang VFD, how to get Waterpump switching on with UPF/DRV/DCM connectors?

[chefffe]

The Relay with FA/FB/FC is already in use as an emergency off for the cnc control (motors eg.). Therefore I have to use somehow these Optocouplers.

As you have only one possibility to program FA FB FC, you cant use two functions with it. When I program it to switch only with an error, then the pump will run always except an error occurs. The plan was to switch the pump on, when the spindle starts.

[Doddy]

I think I'm missing the point here. Can you not simply 'or' the FOR/REV inputs to actuate a relay to switch the coolant pump?

[chefffe]

FOR/REV are inputs ... dont know what you mean.

[Doddy]

So, use the switched inputs to actuate a relay AS WELL as command the spindle to spin... So the coolant pump is driven by the demand, rather than the spindle status.

I appreciate that this isn't answering your question on the use of the DRV/UPF outputs

[chefffe]

If this is working I would be fine. Can you tell me how to do it? You mean to actuate an external relay, right? What needs to be connected then where?

Ok, I think I just understood now what you mean. You mean with an extra switch on FOR/REV you turn in parallel a Relay which switch the Pump on. This solution is also not possible, as I need to use the standard control box with display for commands.

Does nobody know how to use these Optocouplers DRV/UPF/DCM?

[Chaz]

I'm confused.

What stops you from just triggering the VFD from the Run signal, having controller use M codes to close relays and the speed reference local to the board (ie, full Hz). Is there a reason you cannot access the traditional FWD command on the VFD?

Also, what's up with the forum today, very slow, timing out.

[chefffe]

I am not sure if we are talking about different things.
I only operate the VFD with its own terminal. To be honest, I am a complete rookie with CNC and this is my first experience. I am pretty happy that everything works so far :), but having this feature would be the last step I wanted to go. If this is not working like I want regarding pump I can anytime let the pump switch on with the +24V Signal and DCM. The only drawback is then that the pump is running also when the spindle is not turning.
I believe you mean I could control it seperately from the VFD which is of course also somehow doable, but I am yet not that advanced so far. To me it would be sufficient just to operate this from the VFD.