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Hello.
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In this video you are going to learn how to read revolution with a encoder  left side.
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You can see applicable software high speed counters and applicable hardware.
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High speed counters in this table for example.
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X0 input of plc.
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You can use c235 as up and down counter for example if you want to use
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your X7 input of your plc.
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You can use C242 and you can use this counter as up and down in here.
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You can see auxiliary relays M bits in plc for 2 phase 2 input counters.
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You can use counter two hundred thirty two thirty three and two hundred thirty four counters and you
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can use for example two hundred thirty two counter as A phase input or phase A input and this can be
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connected.
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This can connect just x 0 so you can use phase B input for c232 and you can connect
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it to X2 input of your plc for hardware high speed counters you can use x 0 for example with X0
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you can use counter two hundred forty three just up counter it will just count up and X1 for counter
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two hundred forty three will be reset signal input and dir means direction and U and D means up
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and down counter so A phase  A input and phase B input counters then you can select your counter according
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to these tables for example you are just turning one direction and you can you just want to read a revolution
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or pulses from your encoder with one direction you can use one phase  input or you can use.
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Okay I'm going to count up and also I will give a direction to my motor so you can use one phase and
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two input for your application and also you can say Okay I will go count up and I will
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count down and go forward and backward and I need to know exact pulses or position in my application
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then you can use 2 phase 2 input counters for example pulse signals received from the encoder connected
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to the shaft of the motor and these are going to be counted and the speed of the motor is going to be
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measured in your application an example let's say this is an example the motor needs to stop for five
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seconds  after every five turns.
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Let's take a look it in our solution.
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It was determined from the table that the input point of the pulse signal to be counted is the x 0 input
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of the counter 235 to be used.
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Let's go here counter235 is here and we are going to use software high speed counter
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and for the up-downcounter of counter 235.
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We need to use x 0 and all other speed counter could also be used for the encoder the a phase of the
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2 phase encoder used can be connected to X0 input if desired and also B phase if desired.
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While feeding the encoder it should be paying attention to its direction we need to paid attention
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to encoder direction since the encoder used produces 100 pulse signals in 1 turn 500 pulse signals should
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be counted for 5 turns.
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So in here.
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Always on contact and then we are going to start our counters and we will count up.
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OK.
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And this value is the maximum value is counters can count this value but this is just a random value
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then
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We will reset each time our counters before this value so M1000 always on contact that we put here
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and first we are moving our counter value to D0 data registers and D0 data register is comparing
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in here with K 500 because our encoder.
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Let's imagine our encoder is producing 100 pulse each turn that moment 500 is going to be equals to 5
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turn and in our example we said okay after 5 turn after every 5 turn Motor needs to stop.
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Just 5 seconds in here
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our data registers 0 is less than five hundred.
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So the motor is turning.
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This is motor forward.
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Output.
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Imagine like this.
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Y0 is our motor forward.
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Output than motor is turning forward when the pulses reached 2500 in D0 will be equal or greater
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than 500.
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That moment this timer is going to be activated in this line.
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So that moment our counter is going to count always but our timer is going to be active and
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that moment motor is going to stop.
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Just five seconds and when timer's came OK our counter is going to be resetted after five seconds and
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this loop is going to start again.
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And we are going to transfer our counter value D0 always in this line after timer is goes high.
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We will move zero to D0 and this time motor is going to turn forward again.
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And with this loop each time we will wait five turn and we will wait five seconds.
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We will wait five turn five turn later.
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We will wait five seconds and with like this we can use our encoder.
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We can use our counter in this page.
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You can see complete outputs and the counter
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maximum kilohertz So what is the meaning of the maximum Khz.
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We can count a pulses from coming encoder.
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That's OK but our counters has limited.
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For example for dvpss2 one phase one simple counter can connect to x 0 x1 x2 and X3 terminals.
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And this input terminals can read a pulses as maximum 20 kilohertz and in here you can see our counters
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maximum input frequencies.
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And in here you can see it is really different.
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Each other counter233 is 5Khz has maximum input frequency but counters two hundred forty
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nine is 20kHz
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So in here we have calculation motor rotation speed per second multiply by encoder resolution must
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be less than this maximum input frequency for example encoder resolution is 1000 pulses
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pulses.
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Let's say like this and your motor rotation speed per second for example let's say 10.
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So this is ten thousand and that moment ten thousand value is c235 can maximum
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according to these maximum input frequency table it can be read these value from the encoder.
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So this is just an example.
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And 10 kilohertz means ten thousand Hz
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So according to this calculation you can select your encoders in this video.
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I'm finished.
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See you in the next video.