Please help me understand this exercise. The goal is to create a signal "output" as in the picture. Both timers are ON-DELAY with time base =0.1s. The set values for timer 000 and timer 001 are 20s and 10s respectively. I don't understand why the output of timer 000 has the shape like that. Why doesn't it start with 1 level as the tim 001 relay is normally closed relay?