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IndustryArena Forum > CNC Electronics > Spindles / VFD > Huanyang VFD, activate relay when running below predefined RPM?
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  1. #1
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    Question Huanyang VFD, activate relay when running below predefined RPM?

    I have chinese 1.5kW spindle with Huanyang VFD. It's air cooled by fan mounted directly to shaft, so it should not run under 8000 RPM. But i installed another auxiliary fan and i want to run it automaticaly when motor runs and RPM drops below 8000. How can i do it?

    I've tried following settings:

    PD052 Multi-Output 3?FA, FB, FC relay function? = 6 (uniform frequency 1 (PD060) reach)

    But that energizes the relay only when i exactly hit the PD060 frequency (+- hysteresis band can be set to 1-10Hz by PD062).

    Then i tried "multi pump" feature:



    • PD130 = 1 (number of aux pumps)
    • PD052 = 25 (link pump 1 to relay)
    • PD060 = high freq
    • PD061 = low freq


    But that does nothing. I can't get it to work (not sure what VFD model i have, some don't have this feature, but i can set these values, so i guess it's there).

    How should i do it? I need the VFD to work like this:

    spindle stopped -> RELAY OFF
    spindle running at >= 8000 -> RELAY OFF
    spindle running at < 8000 -> RELAY ON

    (relay has both NO and NC contacts, so it can be other way round)

    Do you have any idea, how can i achieve this?

  2. #2
    Community Moderator ger21's Avatar
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    Re: Huanyang VFD, activate relay when running below predefined RPM?

    What control software are you using? Maybe you can have the software handle it?
    Gerry

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  3. #3
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    Re: Huanyang VFD, activate relay when running below predefined RPM?

    That differs. Sometimes i control VFD manualy by its buttons, sometimes i control it thru GRBL. I am fully aware of several possible workarounds. But i want to set it up using VFD if possible, because that's right way to do it. Hope there will be some Hunayang guru that will tell me what i am doing wrong :-)

  4. #4
    Super Moderator Al_The_Man's Avatar
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    Re: Huanyang VFD, activate relay when running below predefined RPM?

    Have you tried setting the relay out to '9 'Arbitrary freq 2 reach' and set P0086 to the desired setting.
    Al.
    CNC, Mechatronics Integration and Custom Machine Design

    “Logic will get you from A to B. Imagination will take you everywhere.”
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  5. #5
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    Re: Huanyang VFD, activate relay when running below predefined RPM?

    Quote Originally Posted by Al_The_Man View Post
    Have you tried setting the relay out to '9 'Arbitrary freq 2 reach' and set P0086 to the desired setting.
    I've set PD052 relay to 06 (Uniform Frequency 1 Reach: The contact will act when the output frequency of the inverterreaches the designated frequency (PD060))

    According to my manual the 09 has different meaning:
    09? In Decel: The contact will act when the inverter is in ramp-down.


    But as i say. It only pulses the relay when VFD crosses that frequency, but does not stay energized once frequency continues to go further behind the PD060 value...

  6. #6

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    Re: Huanyang VFD, activate relay when running below predefined RPM?

    Quote Originally Posted by phucrobusl View Post
    I have chinese 1.5kW spindle with Huanyang VFD. It's air cooled by fan mounted directly to shaft, so it should not run under 8000 RPM. But i installed another auxiliary fan and i want to run it automaticaly when motor runs and RPM drops below 8000. How can i do it?

    I've tried following settings:

    PD052 Multi-Output 3?FA, FB, FC relay function? = 6 (uniform frequency 1 (PD060) reach)

    But that energizes the relay only when i exactly hit the PD060 frequency (+- hysteresis band can be set to 1-10Hz by PD062).

    Then i tried "multi pump" feature:



    • PD130 = 1 (number of aux pumps)
    • PD052 = 25 (link pump 1 to relay)
    • PD060 = high freq
    • PD061 = low freq


    But that does nothing. I can't get it to work (not sure what VFD model i have, some don't have this feature, but i can set these values, so i guess it's there).

    How should i do it? I need the VFD to work like this:

    spindle stopped -> RELAY OFF
    spindle running at >= 8000 -> RELAY OFF
    spindle running at < 8000 -> RELAY ON

    (relay has both NO and NC contacts, so it can be other way round)

    Do you have any idea, how can i achieve this?
    Why don't you set the correct Parameter so it won't go below the 8,000 RPM it's as simple as that, just these 2 Parameters being set correct for your spindle minimum speed ,

    Your fan if you need one should run all the time the spindle is running so using any of the relay output to suit On / Off will work

    PD011=150 adjust to suit your minimum RPM

    PD73=150 adjust to suit your minimum RPM Both of these need to be set the same
    Mactec54

  7. #7

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    Re: Huanyang VFD, activate relay when running below predefined RPM?

    Quote Originally Posted by phucrobusl View Post
    I've set PD052 relay to 06 (Uniform Frequency 1 Reach: The contact will act when the output frequency of the inverterreaches the designated frequency (PD060))

    According to my manual the 09 has different meaning:
    09? In Decel: The contact will act when the inverter is in ramp-down.


    But as i say. It only pulses the relay when VFD crosses that frequency, but does not stay energized once frequency continues to go further behind the PD060 value...
    That's because you have programed decelerating and it is pulsing the relay, that would be controlling a Brake on / off to slow down a rotating mass
    Mactec54

  8. #8
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    Re: Huanyang VFD, activate relay when running below predefined RPM?

    Quote Originally Posted by mactec54 View Post
    Why don't you set the correct Parameter so it won't go below the 8,000 RPM it's as simple as that
    I asked about how can i automaticaly enable cooling under 8000 RPM, not how to prevent going under 8000 RPM completely. I am already doing this. Reason why i added external cooling is that i want to use my spindle in low RPM, because it's very useful when cutting plastics (even with 1 flute endmill and fast). I can simply set relay to switch the fan on, when the spindle is running, but i have very powerful fan (from 1U server) and it's loud, so i don't want to run it when over 8000 RPM and spindle fan is sufficient.

    Quote Originally Posted by mactec54 View Post
    That's because you have programed decelerating and it is pulsing the relay, that would be controlling a Brake on / off to slow down a rotating mass
    Not really. It happens even on accelerating and it does not have anything to do with braking. It's just auxiliary relay configured to switch when spindle is at defined frequency...

  9. #9

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    Re: Huanyang VFD, activate relay when running below predefined RPM?

    Quote Originally Posted by phucrobusl View Post
    I asked about how can i automaticaly enable cooling under 8000 RPM, not how to prevent going under 8000 RPM completely. I am already doing this. Reason why i added external cooling is that i want to use my spindle in low RPM, because it's very useful when cutting plastics (even with 1 flute endmill and fast). I can simply set relay to switch the fan on, when the spindle is running, but i have very powerful fan (from 1U server) and it's loud, so i don't want to run it when over 8000 RPM and spindle fan is sufficient..
    I gave you what you need to do, You won't find a way to do what you want with a Huanyang VFD, your air cooled spindle should not be running below 8,000 and there again if it does then it is incorrectly Programed

    It can have a lot to do with Braking , it's just you don't know it

    If you set the Parameters correct it can not go below the set value

    Get a quieter fan, it does not have to be noisy

    The only way, may be by using Modbus and writing your own program

    Or Just a may be, you could try to program the PLC



    Quote Originally Posted by phucrobusl View Post
    Not really. It happens even on accelerating and it does not have anything to do with braking. It's just auxiliary relay configured to switch when spindle is at defined frequency...
    That would be because of what Parameters you have set, it can do that in both directions

    But don't expect to do what you want to do, with a Huanyang VFD, even some of the top VFD Drives won't do this, you can not assign the relays to do very much at all, just basic normal functions
    Mactec54

  10. #10
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    Re: Huanyang VFD, activate relay when running below predefined RPM?

    Don't give up because someone else says you should.
    But if and when you find a solution, make sure you tell us! That would be a great function for others and their application.

    I wonder if you could build an external relay controller that only switches the fan when the rpms drop? But I'm way out of my depth here.
    What about a thermostat on the spindle itself, switching the fan on only when needed - irrespective of rpm?

    Cheers, Joe
    Joe in Aus

  11. #11

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    Re: Huanyang VFD, activate relay when running below predefined RPM?

    Quote Originally Posted by jhovel View Post
    Don't give up because someone else says you should.
    But if and when you find a solution, make sure you tell us! That would be a great function for others and their application.

    I wonder if you could build an external relay controller that only switches the fan when the rpms drop? But I'm way out of my depth here.
    What about a thermostat on the spindle itself, switching the fan on only when needed - irrespective of rpm?

    Cheers, Joe
    No one said it can't be done, and he should give up, it's just what he wants to do and how he was trying to do it, that is not going anywhere, I'm sure there is something that would work, but not the approach he was taking

    A thermostat would be a good approach, I believe he is trying to run his spindle too slow, for a air cooled spindle, and this is where the problem is
    Mactec54

  12. #12

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    Re: Huanyang VFD, activate relay when running below predefined RPM?

    Quote Originally Posted by phucrobusl View Post
    I asked about how can i automaticaly enable cooling under 8000 RPM, not how to prevent going under 8000 RPM completely. I am already doing this. Reason why i added external cooling is that i want to use my spindle in low RPM, because it's very useful when cutting plastics (even with 1 flute endmill and fast). I can simply set relay to switch the fan on, when the spindle is running, but i have very powerful fan (from 1U server) and it's loud, so i don't want to run it when over 8000 RPM and spindle fan is sufficient.
    After looking at what you had tried closely, this may work with these settings, make sure the relay from the VFD Drive has enough amperage rating to switch your fan, most do, but you should check

    Try this as it should turn on a relay and do what you want, you may have to change other parameters you where using back to the Default settings as they may stop this from working

    This will turn on a relay, I don't no if PD062 will control the on / off that well, you can only try it

    PD052=07

    PD061=150Hz or adjust to get to the 8,000 rpm

    PD062= the frequency range that you want it to be on or off, this may need to be set at max of 10Hz if to low it may cause switching on/off rapidly as the spindle RPMs will fluctuate, this may of been what you where seeing with the relays before
    Mactec54

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