CLICK PLC High Speed Inputs: Encoder Setup for Rate from AutomationDirect

Setting up High speed inputs and calculating the rate can be intimidating, but with CLICK it becomes just another simple function. This video shows how to setup an encoder to high speed inputs on a CLICK PLC for Rate calculation. To use high speed inputs on CLICK, you must have a CLICK CPU that supports Ethernet and has DC inputs. High speed counting is not supported on units with AC inputs. You must have CLICK Programming software 2.30 or higher and update the firmware to match this software version. I have an NPN open collector quadrature encoder, that meets the voltage requirements of the CLICK PLC. wire the A Pulse to X1, the B Pulse to X2, and since this is an NPN encoder, I place the positive 24 volts DC positive to the C1 common of the CLICK CPU. To start the setup, select the Function Tab. Select here on High speed input setup. Now, this display really makes the difference here. It shows you exactly what each function does. All you need to do is check the graphic and then select the button that says “Use this mode”. We are calculating rate so select here on Frequency measurement. First, I am going to give this function a Name. Select here to assign where this rate will be stored. I am going to use DD1. This is a signed double integer so the range will be Now, I am going to select here and select the type as quadrature. Now, we need to assign the inputs for this function. So, select here. And since we are doing A B you can see these are in pairs. So, I am going to select X1 and X2 and then hit OK. This portion will allow you to put a multiplier on the count. For rate you have two options. You have either Hz or RPM. Hertz is just a function of the amount of pulses per second. Were as RPM is specific to your application. So, once I select RPM, you notice that I am asked to enter a number. I am looking specifically for the rotation on the encoder itself. My encoder has 360 pulses per rotation. Press Ok. Now you will see your rate function assigned here. Press Ok. And now you will see all of the registers that are assigned to this function here. So, load this project into our CPU. Open a Data View Add my rate register And spin the encoder. If you see a negative rate here that just means the process is running in reverse direction. If you need to change this, just flip A and B inputs on the CLICK CPU. So, no more intimidation when it comes to encoders and high-speed inputs. Just another way CLICK makes advanced simple. If you have any questions, please feel free to comment below or call into our award winning free technical support team. Click here to see more CLICK Videos and select here to subscribe to our YouTube channel to see our new products and solutions.