Flex auto
Ultrasonic sensors use sound waves with frequencies above _____ kHz in order to detect the distance to an object.
16
Ultrasonic sensors use sound waves with frequencies above ______________________________ kHz in order to detect the distance to an object.
16
EEPROM is an acroynm for _____________
Electrically Erasable Programmable ROM
PLC control applications could be: A) Controlling multiple motor starters. B) On and off control of a pump. C) Sorting boxes on a conveyor system by zip code. D) All of the above.
D) All of the above.
The address for bit 10 in word 5 for the SLC 500 is ________. A) B:3.5/10 B) B3:10/5 C) BIT:3.10/5 D) B3:5/10
D) B3:5/10
The memory size of a double word is ________. A) Eight bits B) Eight bytes C) Sixteen bits D) Four bytes
D) Four bytes
T or F Inverting an OR gate will result in creating a NOR gate.
True
T or F You can place two or more input instructions in series in a PLC ladder logic rung.
True
Acronym ____ means Examine If Closed.
XIC
Use the ________ icon in the project tree area to open the Input Forces dialog boxes
Force Files
In an XNOR gate ladder logic diagram, when both inputs are open, the output is_______
High or 1
The main ladder logic diagram is held in _____.
LAD2
A relay is a device that acts on the same basic principle as the _____ switch
Reed
In an XNOR gate ladder logic diagram, when both inputs are open, the output is _____.
energized
According to rule four, output devices cannot be connected in _____.
series
The three different types of PLC programming modules are handheld, dedicated, and ___________________.
computer
The _____ logic diagram is used to program the programmable logic controller (PLC).
Ladder Logic Diagram (LLD)
The normally _____ pushbuttons and switches are always open—until they are forced to close.
N.O.
How many output instructions you can place in series in a ladder logic diagram?
None
What type of instruction you must place as a last instruction on a rung of a ladder logic diagram?
Output
Light-emitting diodes (LEDs) and laser diodes are used in _____ sensors.
Proximity
The AND gate logic may be used when a machine operator must have both hands on pushbuttons to ______ the machine.
start
. A(n) _____ simply turns a motor on and off
starter
The subroutine instructions are in the __________ instruction group
control group
T or F On Line editing commands are available for all SCL500 series processors
false
An AND gate ladder logic diagram requires _____ rung(s).
one
File number _____ and _____ are system files
SY0, SY1
A(n) __________ is a control device that uses electromagnetism to convert electrical energy into mechanical motion
Solenoid/motor
You must energize the ______ coil to open an XIC LATCH/UNLATCH contact
Unlatch
In a one-rung NAND gate ladder logic diagram, the input instructions must be _____.
Closed
. A ____ converts the digital output signals back to analog signals. a. bus b. register c. triac d. digital-to-analog converter
D. Digital-to-analog converter
T or F Simplex channeling occurs when the DTE either transmits data to or receives data from the DCE.
True
T or F Sourcing occurs when the current flows out of the PLC port and sinking occurs when the current flows into the PLC port.
True
T or F The arithmetic logic unit (ALU) carries out math and logic instructions
True
T or F When selecting PLCs that meet your needs, you should consider manufacturer's support, serviceability, and programming software.
True
T or F You can place two or more input instructions in series or parallel with each other in a PLC ladder logic rung
True
When a branch is inserted inside another branch, the branches are called _____ loop.
Nested
Inverting an NOR gate will result in creating a(n) _____ gate.
OR
Acronym _____ means Examine IF Open.
XIO
The two main sections of motor starters are _____ and overload protection.
contactor
. In general, a relay consists of a magnetic core and its associated coil, _____, spring, armature, mounting, and terminals.
contacts
In general, a relay consists of a magnetic core and its associated coil, _________ , spring, armature, mounting, and terminals
contacts
Ports that are either open (off) or closed (on) are discrete ________ ports
input
A(n) _____ relay is typically used in the control of low-power circuits or other relays.
power
PPI is an acronym for _____.
programmable peripheral interface
A(n) _____ sensor detects the presence of currents induced by magnetic fields to detect nearby metallic objects
radar
CPU is an acronym for _____.
Central Processing unit
In a one-rung NOR gate ladder logic diagram, both inputs must be normally _____.
Closed
There are _____ rules accepted as standard in the control industry for creating relay logic diagrams
9
The Main PLC ladder logic diagram is always in file number _____.
LAD2
The software that resides in ROM is called _____.
Firmware
Transmitted data that have an even number of ones uses _________________________ parity.
even
The ______________________________ is a rack that serves as an electrical backplane for a PLC processor and I/O modules.
chasis
. XIC is an acronym for _____.
examine if closed
A sourcing output device must be connected to a(n) ______________________________ output module port
sinking
A sinking input device must be connected to a(n) _____ input module port
sourcing
Momentary pushbuttons, also called ______________________________ pushbuttons, change their states from open to closed or from closed to open.
spring loaded
T or F It is better to name each of the PLC subroutines
true
A(n) ______________________________ simply turns a motor on and off.
Motor Starter
An Allen-Bradley SLC 500 series PLC has integer words addressed from _____ to _____.
N7:0, N7:255
In a one rung NAND gate ladder logic diagram, the input instructions must be ________
NC
In a one rung NOT gate ladder logic diagram, the input instruction must be _______.
NC
In a two rung NOT gate ladder logic diagram, the input instruction must be _______.
NO
. Number of output ports. List their module/port addresses.
O:2,4,6/0-15, 3x16=48
When the input to a NOT gate is ON, the output will be ____.
Off
List at least five data that is held in PLC system memory.
Output file, Input file, flag status file, bit file, timer file, counter file, control file, integer data file
In a one-rung NAND gate ladder logic diagram, the inputs must be in_________
Parallel
In a two rung NOR gate ladder logic diagram, inputs are connected in _______
Parallel
A(n) _____ check is used to find transmission errors
Parity
A(n)_______ is typically used in the control of low-power circuits or other relays
Power Relay
. A(n) _____ microprocessor typically uses only one instruction for a complex command.
Reduce Instruction Set (RISC)
A relay is a device that acts on the same basic principle as the ______________________________ switch
Reed
A(n) _____ logic diagram is created to show the logical relationship between devices.
Relay Logic Diagram (RLD)
Every subroutine file must have a _________ instruction in their last rung.
Return
In a one rung XNOR gate ladder logic diagram, the normally closed input instructions are connected in ______
Series
The input instructions in XOR gate ladder logic diagram are connected in _______ and ______
Series, Parallel
Number of bit contacts. List their addresses.
Sim B3:0-99 Actual B3-10:0-256
Number of Counter functions. List their addresses
Sim C5:0-99 100 counters actual C5:0-255 256 counters
Number of Timer functions. List their addresses.
Sim T4:0-99 100 timers actual T4:0-255 256 timers
A sourcing output device must be connected to a(n) _____ output module port
Sinking
A(n) ______________________________ is a control device that uses electromagnetism to convert electrical energy into mechanical motion.
Solenoid
A sinking input device must be connected to a(n) ______________________________ input module port
Sourcing
An Allen-Bradley SLC 500 series PLC has timers addressed from _____ to _____.
T4:0 to T4:255
T or F A proximity switch uses a light emitting diode (LED) and a phototransistor
True
T or F Both inputs to an AND gate must be on to have its output on
True
T or F Both inputs to an XNOR gate must be on to have its output on.
True
T or F Discrete input ports are ports that are either open (off) or closed (on).
True
T or F Each output device can only be represented once in a relay logic diagram
True
T or F In a PLC ladder logic rung, the last instruction must be an output instruction
True
T or F Inductive sensors detect the presence of currents induced by magnetic fields to detect nearby metallic objects
True
T or F Inverting a NAND gate will result in creating an AND gate.
True
T or F One benefit of PLCs over electromechanical relay logic systems is PLCs require minor wiring and can be modified and reprogrammed within a few hours
True
T or F Only one input to an OR gate must be on to have its output on.
True
T or F Read only memory (ROM) holds the permanent system program
True
T or F Same input address instructions may be used two or more times in a PLC ladder logic diagram
True
The ______________________________ Allen-Bradley SLC 500 PLCs give you the option of chassis, power supply, processor, and I/O modules.
modular
A(n) ______________________________ pushbutton or switch is always closed—until it is forced to open
normally closed
A(n) _____ sensor detects an object through the change in the sensor's dielectric
capacitive
A(n) ______________________________ pushbutton or switch is always open—until it is forced to close
normally open
You may use the FORCE function to force an input instruction _____ or _____.
on, off
. A(n) _____ sensor uses visible, ultraviolet, infrared, or laser lights and requires both an emitter to generate the light beam and a detector.
proximity
. When a FORCE function is enabled, the force ON/OFF words is in ____ colors.
red
A(n) _____ is a control device that uses electromagnetism to convert electrical energy into mechanical motion
relay
In the relay logic diagram, _____ must flow from left to right
current
XIO is an acronym for _____.
examine if open
T or F The R6 data file is used for counter functions
false
T or F You may use the PLC FORCE function in a manufacturing plant when assembly line workers are present
false
SRAM uses a(n) _____ to hold a data bit.
flip-flop (ie 4 transistors)
A(n) _____ switch is used in factory environments as an emergency or contact switch when a worker is using both hands for assembling a product.
foot
A(n) _____ sensor is basically a semiconductor device (transistor) that can be switched by magnetic fields
hall effect
In a one-rung XNOR gate ladder logic diagram, the normally closed inputs are connected in _____.
series
SLC is an acronym for _____.
small logic controller
Slowly accelerating a motor from standstill to operating speed is referred to as _____.
soft start
According to rule six, all the input and output devices must be placed _____.
horizontally
Two types of motor overload relays are available in industry: temperature overload relays and ______________. overload relays.
magnetic
An OR gate ladder logic diagram requires ____ rung(s)
two
To LATCH/UNLATCH a contact, ______ push buttons are used.
two
You can create a NAND gate logic diagram utilizing either one rung or _____
two
UVEPROM is an acronym for _____.
ultraviolet erasable programmable ROM
How many input instructions you can place in series in a ladder logic diagram?
As many as the PLC memory capacity allows
BIOS is an acronym for _____.
Basic Input Output System
A unit for measuring the speed of serial communication transmission is the _________________________ rate
Baud
The unit of transmission for measuring the speed of communication is _____.
Baud Rate
LATCH/UNLATCH coils and contacts must have the same ____ address
Bit
In a two rung NOT gate ladder logic diagram, you must use a ____ contact.
Bit control relay
The scan time ________. A) Is usually never over 1 millisecond B) Is constant for all programs regardless of length C) Determines how fast an output actuator will respond after a change in an input filed device D) Starts with the last rung and works up to rung 0
C) Determines how fast an output actuator will respond after a change in an input filed device
A(n) _____ microprocessor uses several math instructions to carry out complex commands.
Conventional Instruction Set (CISC)
In addition to the decimal number system, the number systems used most often in PLC operation and programming are ________. A) Binary and octal B) Octal and BCD C) BCD and hexadecimal D) Binary and hexadecimal
D) Binary and hexadecimal
An SLC 500 output address is O:2/10, what slot is the module in and what terminal is used for the connection? A) Slot 10 and terminal 2 B) Slot 2 and terminal 12 C) Slot 12 and terminal 2 D) None of the above
D) None of the above
A __________ Converts the digital output signals back to analog signals a. Bus B. Register C. Triac D. Digital-to-analog converter
D. Digital-to-analog converter
Digital, or variable, output modules use _____ ICs to convert digital data supplied by the PLC processor to scalable voltage or current output
DAC
. In an optical sensor, a(n) ______________________________ is used to generate light beams in the visible and invisible spectrums using light-emitting diodes (LEDs) and laser diodes.
Emitter
EPROM is an acronym for ______________
Erasable Programmable ROM
T or F According to rule nine, the location of each contact associated with a coil can be recorded by the left-hand rail near the coil
False
T or F All three inputs to a three-input AND gate must be on to have its output on
False
T or F An address number writes over the instruction description for an Input or Output instruction
False
T or F Both inputs to XOR gate must be on to have its output on.
False
T or F Both inputs to a NAND gate must be on to have its output on.
False
T or F Both inputs to a NOR gate must be on to have its output on
False
T or F Both inputs to an XNOR gate must be off to have its output off.
False
T or F Flow switches are used to open and close contacts in response to changes in liquid level
False
T or F Hall effect sensors produce sound above the normal human hearing threshold of 16 KHz and use this sound to detect the distance to an object
False
T or F In half duplex channeling, the DTE transmits data to and receives data from the DCE through two separate transmission lines.
False
T or F Microprocessor units (MPUs) use an octal transceiver to enable ROM, RAM, I/O port devices, and support chips
False
T or F Same output address instructions may be used two or more times in a PLC ladder logic diagram
False
T or F Static RAM (SRAM) stores data in the form of charge on capacitors.
False
T or F The user memory segment stores information needed to execute the user program.
False
T or F You can place two or more output instructions in series in a PLC ladder logic rung.
False
T or F You can place two or more output instructions in series or parallel with each other in a PLC ladder logic rung.
False
A(n) _____ is a sequential digital device that generates a different output for every input on the next clock pulse.
Flip-Flop
The ______________________________ instruction allows the system to run and allows the program to be modified while the system is running.
Force
A method of testing the PLC system without actually closing or opening input devices is to test the PLC in the _____ mode.
Forced
. In a NOR gate ladder logic diagram, when one input is closed and the other one is open, the output is _____.
High
Number of input ports. List their module/port addresses.
I: 1,3,5/0-15, 3x16 = 48
What is the difference between a Fixed PLC system and a Modular PLC system?
In a fixed PLC system all units that make the PLC are contained in one enclosure. Number of inputs and outputs cannot be changed. In a modular PLC system each unit is placed in a different rack, and input and output modules can be added to change the # of I/O's
Can the same input or output instruction be used more than one time in a ladder logic diagram?
Input-Yes Output- No
How many factors would you consider for selecting a PLC? List them
Mechanical Factors: Serviceability/Support, flexibility, expandable, training and documentation economical factors: initial cost, warranty, service charges, I/O expansion, cost of memory
In a NAND gate ladder logic diagram, when both input instructions are open, the output will be ____
1
In a NAND gate ladder logic diagram, when one input is closed and the other one is open, the output will be _____ .
1
In a NOR gate ladder logic diagram, when both input instructions are open, the output will be ____
1
In an AND gate ladder logic diagram, when both input instructions are closed, the output will be ____.
1
An Allen-Bradley SLC 500 series PLC has counters addressed from _____ to _____.
C5:0 to C5:255
T or F Input devices can be represented multiple times in a relay logic diagram
true
T or F Program file number seven can be used for PLC subroutine ladder logic diagram.
true
T or F System data files zero and one are not available to a PLC programmer.
true
T or F The Data File S2 dialog box displays the error messages.
true
T or F The T4 data file is used for timer functions.
true
T or F Two pushbuttons are typically used for each LATCH/UNLATCH function.
true
T or F You must specify the subroutine file number in a JSR function.
true
What is wrong with Erik Henderson?
Donkey Brains
In order to change the program, the PLC must be in _____ mode.
Program
A(n) _____ diode is a semiconductor device that can maintain a steady voltage level.
zener
Allen-Bradley SLC 500 PLCs have Channel __________________ and Channel _____________ that can be used for communications.
zero, one
In an XNOR gate ladder logic diagram, when input instructions are closed, the output will be ____
1
Bit addresses b3/0 through b3/255 or ____ through ____ may be used for LATCH/UNLATCH
B10/0, B10/255
PLC subroutine ladder logic diagrams may be placed in file number ______ to file number ______.
3, 255
The instruction with address I:1/2 represents the PLC input port _____ in the PLC module _____.
2, 1
The instruction with address I:1/2 represents the PLC input port ______ in the PLC module _____.
2, 1
A(n) _____________________ sensor detects the presence of metallic objects using magnetic fields
Radar
In a NAND gate ladder logic diagram, when both input instructions are closed, the output will be _____
0
In a NOR gate ladder logic diagram, when one input is closed and the other one is open, the output will be ____
0
In an AND gate ladder logic diagram, when both input instructions are open the output will be ____.
0
In an AND gate ladder logic diagram, when one input is closed and the other one is open, the output will be ____.
0
In an OR gate ladder logic diagram, when both input instructions are open, the output will be _____
0
In an XNOR gate ladder logic diagram, when one input is closed and the other one is open, the output will be ___
0
In an XOR gate ladder logic diagram, when both input instructions are closed, the output will be ____
0
In an XOR gate ladder logic diagram, when both input instructions are open, the output will be ____
0
On a NOR gate ladder logic diagram, when both input instructions are closed, the output will be _____ .
0
The instruction with address O:2/0 represents the PLC output port _____ in the PLC module _____.
0, 2
The instruction with address O:2/0 represents the PLC output port ______ in the PLC module ____ .
0, 2
In an OR gate ladder logic diagram, when both input instructions are closed, the output will be ____
1
In an OR gate ladder logic diagram, when one input is closed and the other one is open, the output will be ____
1
In an XNOR gate ladder logic diagram, when both input instructions are open, the output will be ____
1
In an XOR gate ladder logic diagram, when one input is closed and the other one is open, the output will be ____
1
In the Input Forces dialog box, place a ___ to force an input instruction ON.
1
A(n) ____ is a semiconductor device that can maintain a steady voltage level. a. zener diode b. optoisolator c. flip-flop d. full-wave rectifier
A. Zener Diode
What is the difference between a discrete PLC input port and a variable PLC input port?
A discrete input port can only receive an ON or OFF signal. A variable input port can receive an analog signal and convert it to a digital or binary signal
Which one of the following scan statements is NOT true? A) A one second scan time is common. B) Some instructions affect the length of the scan time. C) Allen Bradley PLCs scan from left to right and top to bottom of the ladder logic. D) Scan time is affected by the length of the program.
A) A one second scan time is common.
The examine if closed instruction ________. A) Has the following logic symbol (-| |-) B) Is an input instruction only used for field devices with NO contacts C) Can only be assigned an input file address starting I: D) Has the following logic symbol (-|/|-)
A) Has the following logic symbol (-| |-)
The examine if open instruction ________. A) Has the following logic symbol (-|/|-) B) Has the following logic symbol (-| |-) C) Is an input instruction only used for field devices with NC contacts D) Can only be assigned an input file address starting I:
A) Has the following logic symbol (-|/|-)
A field device is connected to an input module in slot 4 at terminal 9, what is the correct SLC 500 address? A) I:4/9 B) I/4:9 C) I:9/4 D) I/9:4
A) I:4/9
Which of the following statements is NOT correct? A) The cost and size of PLCs have increased significantly in the last 10 years. B) The physical wires between the input and output field devices and the PLC input and output modules are the only signal wires required in the PLC system. C) If a problem in a PLC module occurs, the module can be changed in a matter of minutes without any changes in wiring. D) Outputs can be paralleled on the same rung.
A) The cost and size of PLCs have increased significantly in the last 10 years.
In the process of developing a PLC program, the developer can always change ________ to work with the other given conditions of the system. A) The input (XIC or XIO) and output (OTE, OTL, or OUT) instructions. B) The active condition (active or not active) of the input field device. C) The inverse or direct acting condition for the output field device. D) The NO and/or NC contacts of the input field device.
A) The input (XIC or XIO) and output (OTE, OTL, or OUT) instructions.
The OTE output instruction is ________. A) True (activated) if the rung link to the left is true B) Not reset to a false state when the rung link to the left is false C) Assigned either the (-(U)-) or the (-(L)-) output symbols D) A retentive type output
A) True (activated) if the rung link to the left is true
The order of operation for a program scan is ________. A) Read inputs; update input register; check ladder input logic; update outputs; update output register B) Read inputs; update input register; check ladder input logic; update output register; update outputs C) Read inputs; check ladder input logic; update input register; update output register; update outputs D) Check ladder input logic; read inputs; update input register; update output register; update outputs
B) Read inputs; update input register; check ladder input logic; update output register; update outputs
Which of the following statements is correct? A) A ladder logic program is hard to analyze because it is totally different when compared with the equivalent relay logic solution. B) The number of ladder logic virtual relays and input and output instructions is limited only by memory size. C) Ladder logic is a PLC graphical programming technique introduced in the last 10 years. D) The number of contacts for a mechanical relay is limited to number of coils on the relay.
B) The number of ladder logic virtual relays and input and output instructions is limited only by memory size.
Which one of the following statements on PLC 5 and SLC 500 binary bits is NOT true? A) The status of PLC internal relay bits is displayed in the Binary Bit Data File. B) The quantity of internal relays is set by the rack size of the system. C) PLC Ladder logic uses memory bits as internal relays. D) PLC internal relays are also called virtual control relays.
B) The quantity of internal relays is set by the rack size of the system.
When a relay is NOT energized: A) There is an electrical path through the NO contacts. B) There is an electrical path through the NC contacts. C) Neither the NO or the NC contacts have an electrical path. D) Both the NO and the NC contacts have an electrical path
B) There is an electrical path through the NC contacts.
PLCs are ________ designed for use in the control of a wide variety of manufacturing machines and systems. A) electromechanical systems B) special-purpose industrial computers C) personal computers D) All of the above
B) special-purpose industrial computers
If all the units are in one fixed enclosure, the PLC is called a ____ PLC. a. modular b. fixed c. discrete d. None of the above
B. Fixed
The section of the PLC system memory that holds the status of discrete input ports is the ____ status. a. counters' b. input c. timers' d. output
B. Input
The ____ segment holds the ladder logic program. a. system memory b. user memory c. serial communication d. Simplex
B. User Memory
Which of the following statements is not correct? A) Input and output instructions in ladder logic do not directly represent the switches and actuators. B) The PLC rung output [-( )-] is a discrete output instruction or bit in memory. C) Each rung of the ladder logic represents a logical statement executed in software inputs on the right and outputs on the left. D) PLC input instructions are logical symbols associated with voltage at the input module terminals.
C) Each rung of the ladder logic represents a logical statement executed in software inputs on the right and outputs on the left.
On SLC 500 models the processor is placed in: A) The last slot. B) Slot 0 or the middle slot if it is a 10 slot rack. C) Next to the power supply. D) Any slot.
C) Next to the power supply.
Which of the following statements refers to the feedback rule or signal flow? A) Test the midpoint block output between the brackets, depending on the test results one of the brackets moves to the middle. B) Assume that brackets enclose the power supply that provides power to three other blocks in the diagram. If power is delivered to one of the system blocks, then the power supply is not the problem. C) The sealing instruction is an example of this type signal flow. D) If all convergent inputs are required to produce a valid output, then a valid output indicates that all input paths are fault-free.
C) The sealing instruction is an example of this type signal flow.
The four major components of a PLC power supply are a line conditioner or varistor, transformer/rectifier unit, RC filter, and ____. a. valve b. fixed PLC c. zener diode d. Microprocessor
C. Zener Diode
The MPU uses _____ memory to speed up the data transfer
Cache
A(n) ______________________________ is typically used in the control of low-power circuits or other relays
Control Relay
In communication systems, DCE stands for ______________________________.
Date communication equipment
. In an XNOR gate ladder logic diagram, when one input is closed and the other one is open, the output is _____.
De-energize
You may use the _______________ instruction in the main ladder logic diagram to call a subroutine ladder logic diagram.
Jump subroutine
You must energize the ______ coil to close an XIC LATCH/UNLATCH contact.
Latch
What are the four major components of a PLC device?
MPU, Programming Device, Power Supply, I/O modules
The control registers for an Allen-Bradley SLC 500 series PLC are addressed from _____ to _____.
R6:0, R6:255
What is the difference between system PLC memory and user PLC memory?
The system PLC memory contains needed programming to execute the ladder logic program. For example the BIOS. the user PLC memory holds the actual ladder logic program
You can create NOT gate ladder logic diagram utilizing either one rung or ____rungs
Two
The input instructions for an OR gate ladder logic diagram must be the _________ type
XIC
The input instructions in XOR gate ladder logic diagram are _______ and _______ types
XIC, XIO
In a one rung NOR gate ladder logic diagram, both inputs must be __________ type.
XIO
Inverting an XOR gate will result in creating an _____ gate
XNOR
A microprocessor unit (MPU) uses a(n)_______________ to enable ROM, RAM, I/O port devices, and support chips
address decoder
A microprocessor unit (MPU) uses a(n) _____ to enable ROM, RAM, I/O port devices, and support chips
adress decoder
If all the units are in one fixed enclosure, the PLC is called a _________ PLC. a. modular b.fixed c.discrete d.None of the above
b.fixed
A(n) _____ is used to input the DC signal to the CPU board
opto-coupler
Rule two states that one (and only one) _____ is placed near the right corner of the rung.
output
You may use the FORCE function to energize or de-energize _______ instruction
output