I need to use digital PWM signal, the current selection is Beckhoff EL2502 2ch PWM module. I added a device description file, but there are only 2 channels in IO MAPPING to adjust the duty option and no option to adjust the frequency.
I have consulted the documentation and the frequency needs to be written in the CoE cycle. I'm not quite able to understand this problem. I see EL2502 's startup Parameters with the PWM settings option to change the frequency, but I need to change the frequency with the requirements in the PLC. I suppose I could be configuring the Expert process data in EK1100. I don't quite understand how to relate it to a variable.
What I want to do is similar to Schneider's FB
EL2502 Module Documents at https://www.beckhoff.com/english/ethercat/el2502.htm