Question

All timers below start with an accumulated value of 0 and then the timer instructions are energized for 5 seconds and then de-energized for 6 seconds. For which of the timers below will the DN bits be activated at the end of the 6 second interval? (circle all that apply) 1. a TOF with time base of 0.01 and preset of 800 b.) TON with time base of 0.01 and preset of 800 TOF with time base of 1.0 and preset of 800 RTO with time base of 0.001 and preset of 800 State which one instruction (CTU, CTD, RTO, RES, TON, TOF) is best suited to each of the following situations. Each could be used more than once or not at all. 2. CTc activate an output when a value of 10 is reached Could be used to count the number of objects leaving a process and Could be used to reset a counter instruction so that its accumulated value returns to zero. c)LES Could be used to reset a retentive timer instruction so that t ccumulated value returns to zero. d) CTO_Could be used with a CTU instruction to create an up-down counter. Could be used to sound an alarm when a motor has been running for 8 hours, not necessarily all at once.

Answer 1

Given that all timers with an accumulated value of 0 and then the timer instruction and energized the 5 seconds and then de energy for 6 seconds. The TDF with time base of 0.01 and present of 800 will the DN bits be activated at the 6 seconds interval correct answer is (a) TDF with time base of 0.01 and present of 800 because the timer DN bit has high after All timers below start with an accumulated value of 0 and then the timer instructions are energized for 5 seconds and then de-energized for 6 seconds. For which of the timers below will the DN bits be activated at the end of the 6 second interval (Circle all that apply) 1. a TOF with time base of 0.01 and preset of 800 b.) TON with time base of 0.01 and preset of 800 TOF with time base of 1.0 and preset of 800 RTO with time base of 0.001 and preset of 800 State