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Detailed description of the operation of the PL7_3_TIMER function
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Original instructions
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Detailed description of the operation of the PL7_3_TIMER function
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Original instructions
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E
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0
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0
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1
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1
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C
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0
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1
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0
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1
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PT
ET
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ET = PT
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ET = PT
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ET frozen
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ET decreases by PT to 0
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D
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0
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1
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0
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1 if timer elapsed
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R
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0
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1
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0
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1 if timer running
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Phase
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Description
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1
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The current value PL7_3_Timer_1.ET decreases from the preset PL7_3_Timer_1.PT towards 0, by one unit per base time pulse.
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2
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The output bit PL7_3_Timer_1.R (Timer running) is then at state 1, the output bit PL7_3_Timer_1.D (Timer elapsed) is at state 0.
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3
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When the current value PL7_3_Timer_1.ET = 0, PL7_3_Timer_1.D changes to state 1 and PL7_3_Timer_1.R resets to state 0.
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