pwmgen continuous run

Hi!
I currently try to use PWM software generator in EMC2 to control spindle speed. Due to nature of my spindle motor, it not love when PWM control disappears, even when it stopped. At least, motor can't be momentary ESTOP'ped when ESTOP condition occurs, because Pwmgen stops immediately, while i need that it switch at minimum duty cycle.
So the question is, how to keep Pwmgen running always?
I read man pages about Pwmgen and found only this...and not found how to tune Pwmgen to run always.
Can it be solved?
Thanks!

Are you using a biased PWM, so that 0% is full speed one way, 100% full speed the other, and 50% is stop?

I use 0.1 to 0.2 duty cycle, which currently represents: 0.1 - stop, 0.2 - full forward. A bit different configuration looks like 0.1 - full reverse, 0.15 - stop, 0.2 - full forward. Both is practically useful, and in both cases 0% duty cycle, or PWM off, as well as any other values outside 0.1 to 0.2 range, must be avoided when possible.

What is the interface electronics?

It is Electronic Speed Controller (ESC) for brushless motor, please see here for details
www.linuxcnc.org/component/option,com_ku.../lang,english/#14554

Can you make it work with an up-down PWM instead?

Sorry, i'm not fully understand your question, but probably i can't.

Just don't wire the enable pin. ie, instead of linking pwmgen-enable to emc2-enable, replace it with a setp statement in the HAL that turns it on permanently.
But it still won't run when EMC2 is not active...

Thank you! It is exactly what i need!Works great!