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Chapter 4 – Instructions
‹ Example
After Start is turned ON, Run mode is triggered when the values of Data A and Data B
are not equal.
RUN
Start
Data A
Data B
4.2.41 TON (Timer ON Delay)
IN: Timer starting bit
Variable
PT: Preset time of timer
Q: Time up flag
ET: Elapsed time
After the timer input bit (IN) receives power, the TON instruction turns the timer output
bit (Q) ON when the elapsed time (ET) equals the preset time (PT) in milliseconds.
‹ Overview
Special Variable
Description
Variable Type
Variable. PT
Preset Value
Integer
Variable. ET
Elapsed Time Value
Integer
Variable. Q
Timer Output Bit
Discrete
Variable. TI
Timing Bit
Discrete
When power is passed to the timer starting bit (IN), the TON instruction starts, and:
• Variable.ET (the elapsed time) begins to increment in milliseconds.
• Variable.TI (the timing bit) turns ON.
• Variable.Q (the timer output bit) turns OFF.
When the elapsed time (Variable.ET) increments and equals the preset time
(Variable.PT):
• Variable.ET (the elapsed time) holds the current value.
• Variable.TI (the timing bit) turns OFF.
• Variable.Q (the timer output bit) turns ON, and the instruction passes power.
When the timer starting bit (IN) stops passing power to start the TON instruction:
• Variable.ET (the elapsed time) is reset to zero.
• Variable.TI (the timing bit) turns OFF.
• Variable.Q (the timer output bit) turns OFF.
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Pro-Control Editor Ver. 5.0 User Manual