RollingPin
Member
Hi, I have an application where I need to measure the speed of a rotating roll on a Siemens S7-400 system. I have an incremental encoder connected to that roll and this is connected to a FM450-1 counter module. I assumed that this module should be able to give me a speed (or frequency feedback). But I have found nothing that shows me how this is possible.
Of course the workaround would be to have timer and a counter and measure the speed based on a deltaCount/deltaT. But that would be quite inaccurate at low speeds and fast sample times. Any other ideas?
Of course the workaround would be to have timer and a counter and measure the speed based on a deltaCount/deltaT. But that would be quite inaccurate at low speeds and fast sample times. Any other ideas?