3. Study the ladder logic program in Figure 7-40 and answer the questions that follow: a. What type of timer has been programmed? b. What is the length of the time-delay period? c. What is the value of the accumulated time when power is first applied? d. When does the timer start timing? e. When does the timer stop timing and reset itself? f. When input LS1 is first closed, which rungs are true and which are false? L1 Input LS1 Ladder logic program Outputs L2 LS1 -TON TIMER ON DELAY Timer T4:0 -(EN)- Time base 1 Preset 10(DN) SOL A-fo Accumulated ° SOL B-of T4:0 SOL A 2 3 4 10 DN T4:0 SOL B DN T4:0 R EN T4:0 EN Figure 7-40 Ladder logic program for Problem 3. R

3. Study the ladder logic program in Figure 7-40 and answer the questions that follow: a. What type of timer has been programmed? b. What is the length of the time-delay period? c. What is the value of the accumulated time when power is first applied? d. When does the timer start timing? e. When does the timer stop timing and reset itself? f. When input LS1 is first closed, which rungs are true and which are false? L1 Input LS1 Ladder logic program Outputs L2 LS1 -TON TIMER ON DELAY Timer T4:0 -(EN)- Time base 1 Preset 10(DN) SOL A-fo Accumulated ° SOL B-of T4:0 SOL A 2 3 4 10 DN T4:0 SOL B DN T4:0 R EN T4:0 EN Figure 7-40 Ladder logic program for Problem 3. R