12) Study the ladder logic program in the figure below and answer the questions that follow: a. What is the purpose of interconnecting the two timers? b. How much time must elapse before output PL is energized? c. What two conditions must be satisfied for timer T4:2 to start timing? d. Assume that output PL is on and power to the system is lost. When power is restored, what will the status of this output be? e. When input PB2 is on, what will happen? f. When input PB1 is on, how much accumulate. Ladder logic program Output PB2 L2 T4:1 Inputs (RES) L1 T4:2 PB1 (RES) PL PB2 -RTO PB1 RETENTIVE TIMER ON T4:1 EN 1.0 2900 CON) Timer Time base Preset Accumulated -RTO PB1 T4:1 RETENTIVE TIMER ON Timer Time base T4:2 (EN) 1.0 1780 DN Preset (Na) CON) Accumulated T4:2 PL HE DN

Introductory Circuit Analysis (13th Edition)
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ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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12) Study the ladder logic program in the figure below and answer the questions that follow:
a. What is the purpose of interconnecting the two timers?
b. How much time must elapse before output PL is energized?
c. What two conditions must be satisfied for timer T4:2 to start timing?
d. Assume that output PL is on and power to the system is lost. When power is restored,
what will the status of this output be?
e. When input PB2 is on, what will happen?
f. When input PB1 is on, how much accumulate.
Ladder logic program
Output
PB2
L2
T4:1
(RES
Inputs
L1
T4:2
(RES
PB1
PL
PB2
-RTO
PB1
RETENTIVE TIMER ON
T4:1 EN
1.0
2900
CON)
Timer
Time base
Preset
Accumulated
-RTO
PB1
T4:1
RETENTIVE TIMER ON
Timer
Time base
T4:2 (EN)
1.0
DN
Preset
1780
ON)
Accumulated
T4:2
PL
HE
DN
Transcribed Image Text:12) Study the ladder logic program in the figure below and answer the questions that follow: a. What is the purpose of interconnecting the two timers? b. How much time must elapse before output PL is energized? c. What two conditions must be satisfied for timer T4:2 to start timing? d. Assume that output PL is on and power to the system is lost. When power is restored, what will the status of this output be? e. When input PB2 is on, what will happen? f. When input PB1 is on, how much accumulate. Ladder logic program Output PB2 L2 T4:1 (RES Inputs L1 T4:2 (RES PB1 PL PB2 -RTO PB1 RETENTIVE TIMER ON T4:1 EN 1.0 2900 CON) Timer Time base Preset Accumulated -RTO PB1 T4:1 RETENTIVE TIMER ON Timer Time base T4:2 (EN) 1.0 DN Preset 1780 ON) Accumulated T4:2 PL HE DN
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