110.05 Logic and Process Control System Diagrams

Question 1

• 110.05 Logic and Process Control System Diagrams*
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Answer 1

AND Logic

an output will ONLY be present when ALL inputs are present.

Question 2

• 110.05 Logic and Process Control System Diagrams*
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Answer 2

SELECTIVE AND LOGIC

An output will be present when at least “A” number of the total inputs “B” are present. Typically 2/3, 2/4, etc. There may be more than 4 inputs.

Question 3

• 110.05 Logic and Process Control System Diagrams*
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Answer 3

OR logic

AN OUTPUT WILL BE PRESENT WHEN ANY INPUT IS PRESENT.

Question 4

• 110.05 Logic and Process Control System Diagrams*
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Answer 4

NOT logic

An OUTPUT will be present ONLY when the input is NOT present

Question 5

• 110.05 Logic and Process Control System Diagrams*
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Answer 5

Analog AND logic

ANALOG OUTPUT “A” WILL REPRODUCE ANALOG INPUT “B” WHEN DIGITAL INPUT “C” IS PRESENT.

Question 6

• 110.05 Logic and Process Control System Diagrams*
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Answer 6

ONE Shot

WHEN AN INPUT IS PRESENT, AN OUTPUT IS PRODUCED FOR A DESIGNATED TIME AND THEN LOST.

Question 7

• 110.05 Logic and Process Control System Diagrams*
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Answer 7

Time Delay Logic

Question 8

• 110.05 Logic and Process Control System Diagrams*
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Answer 8

Memory Logic

When the “s” input is present, the output will be present and will remain after the “s” input is removed. When the “r” input is present, the output will be removed unless the “s” input is still present.

Question 9

• 110.05 Logic and Process Control System Diagrams*
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Answer 9

Memory Logic with Actuation Block

When the “l” input is present, the output will be present and will remain after the “l” input is removed. When the “r” input is present, the output will be removed even if the “l” input is still present. (“R” input blocks the presence of the actuation signal.)

Question 10

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Answer 10

Control Switch

Question 11

• 110.05 Logic and Process Control System Diagrams*
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Answer 11

When the input is present, the light will be on. E letter indicates color

B = blue

A = amber

R = red

G = green

W = white

Question 12

• 110.05 Logic and Process Control System Diagrams*
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Answer 12

DIGITAL MANUAL/ AUTO CONTROL STATION

Bubble = controller identification

D = setpoint controller (digital

T = transfer; auto/manual

↕ = Up/down pushbuttons

Question 13

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Answer 13

Question 14

• 110.05 Logic and Process Control System Diagrams*
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Answer 14

Question 15

• 110.05 Logic and Process Control System Diagrams*
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Answer 15

Main Plant Annunciator

Signal is hardwired to main plant annunciator & networked to the ics data

highway. Local annunciators do not show the hexagon.

Question 16

• 110.05 Logic and Process Control System Diagrams*
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Answer 16

Multiple Input Annunciator Window

An output will be present when any input is present with reflash capability for subsequent inputs. Each input networked to the ics data highway. Or-logic is computed by ics at annunciator.

Question 17

• 110.05 Logic and Process Control System Diagrams*
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Answer 17

Pneumatic Signal

Electrical Logic or Digital Signal

Electrical Analog Signal

Question 18

• 110.05 Logic and Process Control System Diagrams*
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Answer 18

3 WAY SOLENOID

When an input is present, the solenoid will energize. The solenoid is shown de-energized. The shaded port is closed to common port “c” and the unshaded port is open to common port “c” . The reverse is true when the solenoid is energized.

Question 19

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Answer 19

4 Way Solenoid

When an input is present, the solenoid will energize. Energized - port “p” is connected to port “a” and port “e” is connected to port “b”. De-energized - port “p” is connected to port “b” and port “e” is connected to port “a”.

Question 20

• 110.05 Logic and Process Control System Diagrams*
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Answer 20

3 Way Solenoid, Dual Coil

When an input is present to either solenoid, the solenoid will energize. When solenoid “s1” is energized, the shaded port opens to port “c” and the unshaded port closes to port “c”. The valve stays in this condition after “s1” is deenergized and until “s2” is energized.

Question 21

• 110.05 Logic and Process Control System Diagrams*
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Answer 21

Final Control Element

Question 22

• 110.05 Logic and Process Control System Diagrams*
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Answer 22

Comparator

Process variable is normally greater than the setpoint and the comparator energizes when the process variable reaches the setpoint.

Process variable is normally greater than the setpoint and the comparator de-energizes when the process variable reaches the setpoint.

Question 23

• 110.05 Logic and Process Control System Diagrams*
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Answer 23

Process variable is normally less than the setpoint and the comparator de-energizes when the process variable reaches the setpoint.

Process variable is normally less than the setpoint and the comparator energizes when the process variable reaches the setpoint.