Display Simulation Time at 'First' Falling edge of a signal only in Simulink

I want to display the time at which a signal drops from True to False for the very first time. I tried using triggered subsystem to write Clock to a Display but it keeps triggering it every time value the signal drops from True to False and only displaying the latest trigger.

Answer 1

[Fangjun Jiang]

You can add an Enable block to make it Enabled Triggered subsystem.

Add a counter to enable it only before the first trigger.

I think a "self-locker" could also work. Inside this Enabled Triggered subsystem, connnect a constant TRUE to a second Outport. It's initial output is FALSE. Do a NOT operation to enable the subsystem.