2. Answer each of the following with reference to the overfill alarm program sho

Question

2. Answer each of the following with reference to the overfill alarm program shown in Figure 11-33.

a. Assume that the vessel is filling and has reached the 300-lb point. State the status of each of the logic rungs (true or false) at this point.

b. Assume that the vessel is fi lling and has reached the 480-lb point. State the value of the number stored in each of the following words at this point:
(1) I:012
(2) N7:1

c. Assume that the vessel is filled to a weight of
502 lb. State the status of each of the logic rungs
(true or false) for this condition.

d. Assume that the vessel is filled to a weight of
510 lb. State the value of the number stored in
each of the following words for this condition:
(1) I:012
(2) N7:1

e. With the vessel filled to a weight of 510 lb, state the status of each of the logic rungs (true or
false).

L1 Stop Start Full solenoid L2 oStart Fill solenoid Fill solenoid Fill solenoid Stop Full Filling 2 Full Full GEQ GREATER THAN OR EQUAL Source A 1:012 3 1:012 Weight (All 16 bits) transducer Source B 500 Full SUB SUBTRACT Source A 4 1:012 500 N7:1 Source B Destination Alarm GEQ GREATER THAN OR EQUAL Source A 5 N7:1 Source B 5

Explanation / Answer

a) 1,2 True(rungs)

b) I:012=410   N7:1=0

c)1,2,3,4 true

d) I:012=510 N7:1=10

e)1,2,3,4,5 true

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