I/O Control170 Basler pioneer12.2.4 Working with TimersThe camera has four timer output signals available: Timer 1, Timer 2, Timer 3, and Timer 4. Asshown in Figure 43, each timer works as follows: A trigger source event occurs that starts the timer. A delay period begins to expire. When the delay expires, the timer signal goes high and a duration period begins to expire. When the duration period expires, the timer signal goes low.Fig. 43: Timer SignalCurrently, the only trigger source event available to start the timer is "exposure active". In otherwords, you can use exposure start to trigger the start of a timer.Timer 1 can only be assigned to output line 1. Timer 2 can only be assigned to output line 2. Timer3 can only be assigned to output line 3. Timer 4 can only be assigned to output line 4.If you require the timer signal to be high when the timer is triggered and to go low when the delayexpires, simply set the output line to invert.12.2.4.1 Setting the Trigger Source for a TimerTo set the source event for a timer: Use the Timer Selector to select a timer. Set the value of the Timer Trigger Source parameter to exposure active. This will set theselected timer to use the start of exposure to begin the timer.You can set the Trigger Selector and the Timer Trigger Source parameter value from within yourapplication software by using the pylon API. The following code snippet illustrates using the API toset the selector and the parameter value:Camera.TimerSelector.SetValue( TimerSelector_Timer1 );Camera.TimerTriggerSource.SetValue( TimerTriggerSource_ExposureStart );For detailed information about using the pylon API, refer to the Basler pylon Programmer’s Guideand API Reference.You can also use the Basler pylon Viewer application to easily set the parameters.For more information about the pylon Viewer, see Section 2.2 on page 20 and Section 2.4 onpage 40.Trigger source event occursDelayDuration
