TimeTrig

TimeTrig (FB)

FUNCTION_BLOCK TimeTrig

FB timer (On/Off timer) with separate on/off durations and triggers for state changes. It only runs when xEnable is active and switches between on and off based on the time settings.

Function The program creates a pulse function / blinker with the following characteristics:

Is activated by xEnable. Start state is set via xStartQ. tOn determines the duration in the “on” state. tOff determines the duration in the “off” state. xQ is the current output state (on/off). xOnTrig and xOffTrig are event flags that are set for one cycle when the state changes. Internal helper variables _tTime, _tStart, _xEnTrig are used for time measurement and edge detection.

InOut:

Scope	Name	Type	Comment
Input	xEnable	BOOL	input signal
Input	tOn	TIME	on delay
Input	tOff	TIME	off delay
Input	xStartQ	BOOL	start option TRUE = start with pulse, FALSE = start with pulse
Output	xQ	BOOL	output pulse
Output	xOnTrig	BOOL	rising edge when xQ = TRUE
Output	xOffTrig	BOOL	rising edge when xQ = FALSE
Output	tET	TIME	elapsed time since the rising edge (switch)