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  1. naturephoenix

    Beckoff TWINCAT 3 - PLCTAsk Hardware Interrupt task call(with certain delay)

    What's purpose of the FAST INPUT MODULE EL1202 | 2-channel digital input terminal 24 V DC, TON/TOFF 1 µs If the maximum PLC Cycle is 50 µs and there is no option hardware interrupt.??https://www.eng-tips.com/threadminder.cfm?pid=791 I've been working more than 5 years with SIEMENS PLC-s...
  2. naturephoenix

    Power factor sign - JK Flip Flop

    I am calculating power factor from samples of voltage and current. Calculation is done by multiplying voltage and current samples. What Im struggling is sign. I have read it is possibleto determine sign with JK negative triggered flip flop method. I found how exactlly JK flip flop works but...
  3. naturephoenix

    Effective values measurement

    Hello guys. I got AI card which takes samples every 50micro sec. My PLC cycle is 1ms which means I get every ms array of 20samples. I am measuring 3 voltages and 3 currents. Phase values. My goal is to have correct and quick as possible measurement. I am measuring frequency with PLL method and...

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