Emergency stop button with a VFD ?

[daedalusminos]

If you are using momentary (i.e. non latching) switches for run (fwd/rev) then that will simplify configuration. If using latching then you need to ensure the VFD can be configured not to start again when the E-STOP is released.

 

[Kayos]

Just read through all this, in an EMERGENCY do you want to rely on an input?

What if the fault is the vfd is over speeding the tool and has some internal fault? You are asking the now faulty vfd to stop the tool quickly

Cut the power and don't use it as a regular stop button, over complicating emergency procedures just makes them useless

Pretty sure if my hand/arm/beard/leg/gentleman's vegetable was trapped in a machine the potential damage to the kit would not even cross my mind

 

[Pete.]

Just read through all this, in an EMERGENCY do you want to rely on an input?

What if the fault is the vfd is over speeding the tool and has some internal fault? You are asking the now faulty vfd to stop the tool quickly

Cut the power and don't use it as a regular stop button, over complicating emergency procedures just makes them useless

Pretty sure if my hand/arm/beard/leg/gentleman's vegetable was trapped in a machine the potential damage to the kit would not even cross my mind

Never heard of a vfd overspeed g due to a fault tbh. Parameters should define max frequency and if you lose the parameters its gonna either shut down or run at default

 

[skotl]

Just read through all this, in an EMERGENCY do you want to rely on an input?

What if the fault is the vfd is over speeding the tool and has some internal fault? You are asking the now faulty vfd to stop the tool quickly

Cut the power and don't use it as a regular stop button, over complicating emergency procedures just makes them useless

Pretty sure if my hand/arm/beard/leg/gentleman's vegetable was trapped in a machine the potential damage to the kit would not even cross my mind

Ditto (and as said by a few other posters here) - I have the same 230v e-stop kick switch that was on the power feed to the original single phase motor. Now it's between Live and the VFD - all I care about is cutting power and I'll sort everything else out once I've verified all my limbs are still connected.