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WorksheetsPLC Final Review
Total questions: 20
Worksheet time: 20mins
What is the job of the CPU?
Forms the interface between input field devices to the controller.
To provide DC power to the PLC.
Store and run the PLC software program.
Forms the interface between output field devices to the controller.
What is the address in the PLC program for a push-button that is landed on terminal 4 in the 3rd slot of the chassis?
I: 3/4
I: 4/3
O: 3/4
O: 4/3
Which type of signal is either ON or OFF?
MMMQ
Data
Analog
Discrete
Which of the following is an input field device?
indicator light
small motor
selector switch
motor starter coil
Which type of memory stores the PLC operating system?
RAM
ROM
GOAT
USB
DC analog output modules use a(n) _____ to convert the signal from the CPU to a signal the field device can use.
analog-to-digital converter (A/D)
discrete converter
conventional converter
digital-to-analog converter (D/A)
What does an optical isolator do?
Electrically isolates the internal components from the I/O terminals.
Uses the data tables to make logical decisions.
Takes a current signal and turns it into a pressure.
Powers up each individual card and it doubles as a communication bus.
How many binary bits are in a byte?
1
2
8
16
What is this symbol?
AND
OR
NOT
NEVER
What is this symbol?
AND
OR
NOT
NEVER
What is this symbol?
AND
OR
NOT
NEVER
What Boolean logic statement describes the above ladder logic?
AND LOGIC
OR LOGIC
NOR LOGIC
NOT LOGIC
Which timer bit is similar to instantaneous contacts in electronic timers?
Timer Enable Bit
Timer Timing Bit
Timer Done Bit
Timer ID Bit
Which of the following is an address for a rung controlled by a timer timing bit?
T4: 3/EN
T4: 3/TT
T4: 3/DN
T4: 3
Which timer parameter is the name of the timer?
Timer ID
Timer Time Base
Timer Preset
Timer Accumulator
When using a TON and the rung condition becomes true, which parameter begins to increment?
Timer ID
Timer Time Base
Timer Preset
Timer Accumulator
If the timer time base is 0.1, what would the preset be for a 5 second timer?
.5
5
50
500
Which of the following is NOT a counter parameter?
Counter ID
Counter Count Base
Counter Preset
Counter Accumulator
Use the Input Instruction Selection Guide to select the correct input instruction:
An activated input field device with NC contacts must energize an output field device.
XIO
XIC
OTE
OTL
Use the Input Instruction Selection Guide to select the correct input instruction:
A not activated input field device with NC contacts must de-energized an output field device.
XIO
XIC
OTE
OTL
