Newbie in need.
I am working with a click plc (C0-01DR-D) from automation direct. I need to interface with an internal timer but my model does not have any analog inputs. To get an analog input and keep the number of relay outputs I need is going to cost me another $90, so I am looking for a way to use a knob control without one. The tech from automation direct tells me the only way is to find a potentiometer (knob) that does Modbus RTU via RS232 or RS485. So far I have been unsuccessful in my search. if anyone knows of one I can buy, or a way to use a normal potentiometer with the tx/rx port, it would be greatly appreciated.