PWM gen

Hi everybody

I'm trying to create a PWM. i try to do this on a 7i66 output.
Is this possible?
I encluded my hal en ini file. In the end i want to use this pwm to control a Spindle.

With kind regards

Sytreca wrote: Hi everybody

I'm trying to create a PWM. i try to do this on a 7i66 output.
Is this possible?
I encluded my hal en ini file. In the end i want to use this pwm to control a Spindle.

With kind regards

I am still a novice this, but looking at the hal file you seem to have these two addf pwmgen.update servo-thread and
addf pwmgen.make-pulses base-thread

Do these need to go between the read and write at the top with the others?

If you are using a 7I66 output you will be limited to the servo thread as the PWM base frequency. This means that to get 1% resolution assumimg a 1 KHz servo thread, you would be limited to 10Hz.

To make filtering easier its probably better to chose PDM rather than PWM

Assuming 1 KHz servo thread, 50% duty cycle PWM at 10 HZ would be 50 ms on 50 ms off, 50% duty cycle PDM would be 1 ms on 1 ms off...

PDM is selected by setting the software pwmgen components frequency to 0

Is it still possible to create a analog signal (0-10V) with this PDM signal?
Because my VFD only accepts 0-10V or 4-20mA.
Or do i need to look for another solution?

Sytreca wrote: Is it still possible to create a analog signal (0-10V) with this PDM signal?
Because my VFD only accepts 0-10V or 4-20mA.
Or do i need to look for another solution?

Both PWM and PDM can be converted to analog voltage by the same low-pass (resistor + capacitor) converter.

(The VFD might well be happy to operate on PWM / PDM without a filter)

Is there any possibility of controlling the VFD with Modbus?

What is controlling the 7i66? Perhaps you could add another smart-serial card, or use another interface?