crash888 Posted November 28, 2022 Report Share Posted November 28, 2022 I am trying to get a couple of encoders working on a new project. I have attached my program for review. I have done similar in U90 ladder with success but this is my first try in unilogics. My controller is a US5 B10 T42 The encoders are magnetic and have 13 ppr. and the motor speed is 6000 rpm I have tried unsuccessfully to change i0 and i1 to high speed I am not sure what I am missing here except that I assume the encoder is way too fast for the plc to count each pulse, Also I am confused as to why the INC command seems to increase not in time with the encode pulses but with the time that it is enables. The ultimate goal once I get this figured out is to use the encoders to ensure that they stay synchronized as the actuators move up and down Chair lift project.ulpr Quote Link to comment Share on other sites More sharing options...
crash888 Posted December 6, 2022 Author Report Share Posted December 6, 2022 I have been able to get my project working somewhat and I have attached the latest ladder. With this setup I am able to get the counters to increment but it seems I am only getting about 10 percent of the pulses to register, With a ppr of 13 and rpm of 6000 I should be seeing 1300 pulses per second. If I spin the shaft by hand i do indeed get the exact amount of pulses I would expect. I have a gear bow with a 12.7:1 ratio . 1 revolution by hand at the driven end gives me 166 pulses. 13 ppr x 12.7 ratio = 166 pulses per rev If anyone has info regarding how to set up the high speed inputs this may be where I am messing up It seems like I may only be getting counts based upon the scan rate and not the HSC I am trying to use. Any though would be greatly appreciated, Chair lift project.ulpr Quote Link to comment Share on other sites More sharing options...
MVP 2023 Joe Tauser Posted December 9, 2022 MVP 2023 Report Share Posted December 9, 2022 On 11/28/2022 at 9:29 AM, crash888 said: The encoders are magnetic What exactly does this mean? Are you using a prox with magnets on a wheel? If so, you may be running into the response time of the sensor. You've got I0 configured as Pulse and Direction. Do you have a Direction input on I1? Put a scope in the input to the PLC and see what the waveform looks like. Joe T. Quote Link to comment Share on other sites More sharing options...
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