PLC Analog Outputs Explained for Beginners

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in this
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video we discuss about common analog
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outputs in a
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PLC so we have a PLC and a
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computer one of the example for analog
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output is motor speed spe set
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point generally whenever we have motor
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speed control
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application we will use variable
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frequency
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drives so the PLC has to send some
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signals to the vfd
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drive to control the
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motor
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okay and it is a 4 to 20 milliamp signal
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and it is analog output which is
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[Music]
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a
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okay and another one
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is control wall and it is a command
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signal like how much percentage the
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control W has to open or has to
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close okay it is also a 4 to 20 milliam
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analog log
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output if we send 4 milliamp signal to
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the
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wall let's say fully
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closed if you send 20 milliamp signals
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then it will fully
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open if you send some 8 milliamp 12
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milliamp 16 mampers Etc
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accordingly it will open like 25% it
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will open 50% it will open 80% it will
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be
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open okay so this is the control W
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command remember the commands are the
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analog
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outputs if we want to know the W
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position feedback
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status then it is analog input to the
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PLC okay the motor speed point it is a
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command the PLC is commanding the vfd
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drive that you maintain this is the
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motor speed you have to
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maintain similarly this is the command
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control Val command this much of
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percentage you have to open or this much
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of percentage you have to
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close so all these are analog
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outputs one more signal is heater
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temperature control let's say you have a
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electrical
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heater and you can control the
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electrical heater
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temperature based on the 4 to 20 mamp
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signal this is also an analog
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output let's suppose the PLC has to send
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some current value or voltage value
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to a vfd drive or a to a annunciator
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panel or a display unit or some third
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party
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device then these are also considered as
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analog outputs and they need 4 to 20
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milliam
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signals
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okay all these are analog outputs if the
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PLC is to send one analog
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value for any
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purpose based on the 4 to20 milliamp
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signal thank you I will meet you in the
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next video

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PLC Analog Outputs Explained for Beginners

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