TON

 Function Block - On timer.

Inputs

Input	Data Type	Range	Unit	Default	Description
IN	BOOL	FALSE, TRUE			Timer command.
PT	TIME	Time Units			Programmed time.

Outputs

Output	Data Type	Range	Unit	Description
Q	BOOL	FALSE, TRUE		Timer elapsed output signal.
ET	TIME	Time Units		Elapsed time.

Remarks

• The timer starts on a rising pulse of IN input.
  • It stops when the elapsed time is equal to the programmed time.
• A falling pulse of IN input resets the timer to 0 (zero).
• The output signal is set to TRUE when programmed time is elapsed.
  • It is reset to FALSE when the input command falls.

Time Diagram

Figure 1: Time Diagram

FBD Language Example

FFLD Language Example

• In the FFLD Language, the input rung is the IN command.
  • The output rung is Q the output signal.

IL Language Example

Not available.

ST Language Example

MyTimer is a declared instance of TON function block.
MyTimer (IN, PT);
Q := MyTimer.Q;
ET := MyTimer.ET;

See Also

• blink
• TOF / TOFR
• TP / TPR