PLC
Which base does hexadecimal numbering use? ____
16
time driven sequencing can be used in applications where ____is not consistent enough to use limit switches for even driven sequencing
ACTUATOR POSITIONING
when the processor is in program mode, output can be turned on by the plc? ___
FALSE
the lbl instruction must always be the ___ instruction in the rung
FIRST
the frd instruction is an internal output instruction that converts bcd data, such as an input tag, into ___ equivalent
DECIMAL
the frd instruction is an internal output instruction that converts bcd data, such as an input tag, into a____equivalent
DECIMAL
___ control of an electric motor only works for motors that draw a small current.
DIRECT
the following statement that does not apply to the optical isolator circuit used in I/O modules is that it ___
RECTIFIES AC SIGNALS
the following statement that does not apply to the optical isolator circuit used in I/O modules is that it: ____
RECTIFIES AC SIGNALS
a communication error between an I/O module and the owner controller causes the controller to fault, program operation to stop, and the output modules" ok indicators to flash ___
RED
the ____ instruction is an output instruction used to reset timers having the same tag name.
RESET
what happens when a rto timers .acc value equals its .pre value?
TIMER DONE BIT ACTIVATES
the ____ instruction is used to turn outputs on or off after the timer has been disabled (or off) for a preset time interval.
TOF
in the tag local:2Idata.3 the number 3 represents what?
input bit#
PLC status lights on an input only show the status of the whole card. The ESM monitors the individual terminals
FALSE
location, slot, and data tyoe refer to which of the following ? ____
MODULE DEFINED
in industry, automatic machines must perform operations ___
REPEATEDLY
in an ___plc input module, an input is on if voltage is applied to the input terminal and off if no voltage is applied to the input terminal
ACTIVE HIGH
the advantage of jmp instruction is that it reduces processor ______
SCAN TIME
which of the following status indicator light conditions is likely to result when a hardwired master control realy (MCR) is automatically de-energized?
SOME INPUTS STATUS LIGHTS ARE ON, THE CPU IS RUNNING LIGHT IS ON, AND SOME ACTION OUTPUT STATUS LIGHTS ARE ON
When voltage is applied to input local:1:i data.1 of a plc, a programmed xio instruction addressed local:1:I:data.1 will be ____
FALSE
after coils and contacts, ____are the most commonly used plc instructions
TIMERS AND COUNTERS
the purpose of a digital output module is ___
TO ENERGIZE LOADS IN RESPONSE TO PLC LADDER LOGIC CONTACTS
programmable logic controllers are categorized according to the ____
NUMBER OF I/O MODULES PLC
the manual mode allows the ___ to operate the actuators one at a time pressing pushbuttons or operating selector switches.
OPERATOR
status indicators are provided on each output of an output module to indicate that the ____
OUTPUT IS ACTIVE
a power diagram shows how the machine action affects the plc's inputs and how the plc's ____
OUTPUTS
the controllogix family of programmable controllers has a test mode that enables the user to test program operation without energizing ____
OUTPUTS
the bcd systems provide a convenient means to handle large numbers that need to be input to or output____
PLC
the plc programs are designed so that the machine stops ____
SAFELY
the reason that different valves are used for the clamp and drill cylinders is ___
SAFETY
the drill cylinder is controlled with a ___solenoid valve
SINGLE
seal-in programs are commonly used to control the ___ of electric motors and is a building block of most other machine control programs.
STAR/STOP
Which of the following devices should be wired to the output terminal of a PLC?
A RELAY COIL
after ___and ___ , timers and cournters are the most commonly used plc instructions.
COILS AND CONTACTS
the ___ window is used to develop ladder logic routines for controllogix projects.
LADDER EDITOR
the bcd system provides a convenient means to handle large numbers that need to be input to or output from a____
PLC
input and output modules communicate with the cpu how?
SERIES OF ELECTRICAL CONNECTIONS IN THE BACKPLANE
most electronic sensors use a ____output to send a signal to the plc
TRANSISTOR
a TON instruction: IS A NON RETENTIVE COUNTER THAT WAITS TO ENERGIZE
IS A NON RETENTIVE COUNTER THAT WAITS TO ENERGIZE
plc output module has the following purpose ____
IT SENDS SIGNALS FROM THE PLC AS INPUTS TO FIELD DEVICES
What is the difference between a controller status flag and a controller object? controller status flags do not require GSV or SSV to access them
controller status flags do not require GSV or SSV to access them
creating a controllogix project requires performing a ____ process
7 STEP
one function of a plc input interface module is to ___
ACCEPT SIGNALS FROM FIELD DEVICES AND CONVERT THEM INTO SIGNALS THAT CAN BE USED BY THE PROCESSOR
one function of a plc input interface module is to ____
ACCEPT SIGNALS FROM THE FIELD DEVICES AND CONVERT THEM INTO SIGNALS THAT CAN BE USED BY THE PROCESSOR
the _____displays the actual time that the timer instruction has been enabled.
ACCUMULATED VALUE
an mcr is used as a safety device to remove power from all plc outputs to disable all ___
ACTIONS
most automatic machines perform a number of ____to accomplish the task for which they have been design
ACTIONS
time driven sequencing cab be used in applications where ____is not consistent enough to use limit switches for event driven sequencing
ACTUATOR POSITIONING
time driven sequencing can be used in applications where ___is not consistent enough to use limit switches for event driven sequencing
ACTUATOR POSITIONING
A __________ are examples of a device that could be used to provide a discrete input to a plc.
ALL OF THE ABOVE (LIMIT SWITCH, PUSHBUTTON, SECLECTOR SWITCH)
in plc program, arranging two xic instructions in series is an example of an ____ logic element
AND LOGIC ELEMENT
an ___ is a collection of numerically indexed tags.
ARRAY
the ____ dialog is used to name the controller and configure various aspects of its hardware
NEW CONTROLLER
when a rung goes false the timer returns to zero, what timer is being used to cause this action? ____
NON RENTENTIVE TIMER
a _____ instruction resets whenever the input is de-energized
NON RETENTIVE TIMER
a discrete output interface module is designed to provide ___
ON/OFF SWITCHING OF THE OUTPUT FIELD DEVICE
when the rung is true, the ____ instruction writes a zero to its tag
OTU
A power diagram shows how the machine action affects the plc inputs and how the plc's ____affect the machine action
OUTPUTS
a ____shows how machine action affects the plc inputs and how the plc outputs affect machine action
POWER DIAGRAM
___ is a method of using logic in a plc program to cause an output to turn on or off if certain inputs or outputs are in a particular state.
PROGRAM INTERLOCKING
program control instructions alter the_____of a plc from its normal sequence
PROGRAM SCAN
module-defined ___ organize and store information about the module
PROGRAMMING DEVICES
a controllogix ____ is the software file that stores all programming instructions, hardware configuration and tag data for a controllogix processor
PROJECT
____ is the user text associated with the rungs and instructions of a controller project that explains the operation of that item.
PROJECTION DOCUMENTATION
in most pick and place robotic programs each step of the program application depends on what kind of input type? ___
SENSOR INPUT SIGNAL
multiple safety interlock can be used in a program by placing input instructions in ____ with each other on a rung
SERIES
the up/down counters done (DN) bit is ____whenever the accumulated (ACC) value is greater than or equal to the preset (pre) value and reset when the value is less than the preset (pre) value.
SET
the four languages used to program a controllogix plc are ____, structured text, fbd, and ladder logic
SFC
the tod instructions ___ field identifies the constant decimal value or tag address that is to be converted to an equivalent bcd value.
SOURCE
the gsv instructions dest field identifies the user created tag where the data will be ___
STORED
the mainroutine may contain all of the programs logic or it may contain instructions that call other routines called ____
SUBROUTINES
latch and unlatch instructions are often paired by using the same ___ for both instructions
TAG
the tod instructions destination identifies the ___address of the converted source value.
TARGET
the controllers ____area contains and schedules all of the user logic files and may contain from 1 to 32 used defined tasks
TASK
a technician has recently added a new sensor, the sensor does not seem to be working correctly. which of the following would the technician check first? ____
THE WIRING OF THE SWITCH
A technician reports that none of the PLC outputs are energizing on the factory floor off of PLC Controller 1. What is the most likely cause?
THERE IS SOME TYPE OF POWER FAILURE
like the ctu instruction, the ctd instruction uses ___ DINT members in its tag structure.
THREE
which of the following is the number of true inputs a three input "and logic:" must have to have a true output?
THREE
a bcd ____ is an input device that enables a machine operator to adjust a plc instructions preset value without having to use a programming terminal.
THUMBWHEEL
which of the following is not a function of a plc programming device? ____
TO EXECUTE THE USER PROGRAM
The ____ instruction converts a decimal data tag, such as the preset value of a counter instruction, into a BCD value.
TOD
The___instruction converts a decimal data tag, such as the preset value of a counter instruction, into a bcd value
TOD
the ____instruction converts a decimal data tag, such as the preset value of a counter instruction, into a bcd value
TOD
most electronic sensors use a ___output to send a signal to the plc.
TRANSISTOR
solid state ac output modules use a special kind of solid state device called a ____
TRIAC
there are ___ ways to have more than one output controlled with the same input logic
TWO
plc input modules vary according to four features, ____, level of voltage, number of inputs and active high or active low input
TYPE CURRENT
plc solid state outputs can be directly interfaced to another machines inputs only if the ____and transistor types are compatible
VOLTAGES
what would make a machine ill suited for a direct connection to a PLC?
different voltage
retentive timers differ from non-retentive timers primarily how? how they recover from a de-egergized state
how they recover from a de-energized state
to distinguish the bcd numbering system from binary, a ____is placed to the right of the least significant digit
BCD DESIGNATION
to distinguish the bcd numbering system from the binary, a ___is placed to the right of the least significant digit
BCD DESIGNATION
The tod instructions instructions SOURCE field identifies the constant decimal value or tag address that is to be converted to an equivalent ____
BCD VALUE
What type of power can a PLC use to operate the processor and I/O boards?
DC
the ____bit is set when the timer instruction is enabled and reset when the instruction goes false
ENABLE BIT
Sealing in a motor using seal in logic provides no guarantee that the motor has been
ENERGIZED
plc input/output diagrams are used to show the specific physical connections between the ____
EXTERNAL DEVICES
plc input/output diagrams are used to show the specific physical connections between the ____ and the plc I/O terminals
EXTERNAL DEVICES
plc input/output diagrams are used to show the specific physical connections between the _____and the plc I/O terminals.
EXTERNAL DEVICES
If a normally open auxiliary pushbutton is connected to a normally closed contact contact in the ladder logic, pressing the pushbutton will cause the cause the contact to turn ____
FALSE
MCRs should not be used to initialize counters and latches because it will cause outputs to energize creating unsafe conditions
FALSE
You cannot use RTO instructions in time-driven sequencing because of the retentive property of the instruction.
FALSE
in time driven sequencing an environmental event must occur prior to the occurenrence of the next event in the sequence.
FALSE
once latched the tag of a latch output remains a 2 even when the rung turns ____
FALSE
when first mcr is false all outputs within the fence are ____, even if rung inputs are true within the fence
FALSE
when voltage is applied to input terminal local:1:I:data.1 of a plc, a programmed xio instruction addressed local 1:I:data.1 will be ____
FALSE
what set of instructions govern the basic routines of the ESM?
FIRMWARE
an mcr instruction that is used with the ____can also be used to initialize a plc application to some predetermined state.
FIRST SCAN FLAG
____memory is used by the plc's operating system
FLASH
The most common form of memory used to store, back up, or transfer plc programs is:
FLASH EEPROM/EEPROM
A programmable controllers outputs can control both ___ and electric motors
FLUID POWER
the bcd system uses ____ bits to represent each decimal digit.
FOUR
the bcd system uses____ bits to represent each decimal digit.
FOUR (4)
when troubleshooting a plc control system., the first step should be? ____
IDENTIFY THE FAULTY OPERATION
one of the advantages of a plc is that it permits many instructions to be controlled by one ___
INPUT
plc memory files use ____
INPUT IMAGES
plc memory files use ____to address hardwired inputs
INPUT IMAGES
interfacing between the on/off field devices is the function of what? _
INPUT MODULE
what is the function of an input module ___
INTERFACE BETWEEN ON AND OFF DEVICES
a rung that uses a ____can be used to control the start/stop of any automatic program.
INTERNAL COIL
one application of an ___ instruction is to control the simultaneous start and stop of several outputs.
INTERNAL INPUT
a TOF instruction: IS A NON RETENTIVE COUNTER THAT WAITS TO DE-ENERGIZE
IS A NON RETENTIVE COUNTER THAT WAITS TO DE-ENERGIZE
plc input module has the following purpose ___
IT CONNECTS SIGNALS FROM THE PROCESSOR AS INPUTS TO THE PLC
what is decimal number 6 converted to binary?
0110
the first scan flag is set for only the ____
FIRST SCAN
auxiliary stop pushbuttons are always ___ contacts in ladder logic
XIC
what is decimal number 41 converted to binary ____
101001
what is decimal numer 41 converted to binary (add the 1's to total 41)
101001
if a 4 digit led display reads 2792 in decimal. what is the equivalent in binary?
0010011110010010
A technician knows that the plc program is not receiving a start command from a switch in the field. how could the technician determine if the problem is a bad switch or a bad input module? ____
CHECK TO SEE IF THERE IS POWER GOING TO THE SWITCH
serial communication is best described by ____
CONNECTING RS-232 CABLE BETWEEN TWO DEVICE
when troubleshooting, observing that all input I/O state indicators are off (but processor indicators are on) means that ___
CONTROL POWER
the ____ dialog is a studio 5000 software utility that displays configuration, operation, and status information offline and online.
CONTROLLER PROPERTIES
a current sourcing sensor must be matched with a ___ plc input module
CURRENT SINKING
a current sourcing sensor must be used with CURRENT SINKING ____
CURRENT SINKING INPUT MODULE
a current sinking input module must be used with ___
CURRENT SOURCINGSENSOR
the ___instruction is an internal output instruction that converts bcd data, such as an input tag, into a DECIMAL equivalent.
DECIMAL
when the ____instruction is energized all program logic between it and lbl instructions is frozen
JMP
when the ___instruction is energized, all program logic between it and the lbl instructions is frozen in its last state.
JMP
an ____display is an output device that enables a machine operator to view the accumulated or preset value of an instruction without the use of a programming terminal
LED
the bcd numbering system is used with bcd thumbwheel switches and ___
LED DISPLAYS
plc discrete output turns real-world ___ devices on or off as directly by the plc.
LOAD
the output interface module connects to ____
LOAD DEVICES SUCH AS LAMPS OR SOLENOIDS
documenting physical connections of the plc to machine electrical hardware is known as ____
MAIN USE OF INPUT AND OUTPUTS
the accumulated (acc) value of an up/down counter is equal to the number of up counts ___the number of down counts.
MINUS
in industry automatic machines must perform operations ___
REPEATEDLY
the ton instruction is similar to the rto instrcution, however, the ton instruction tag ____when the instruction is de-energized
RESETS
_____ networks are protection devices that are used to reduce the problems with ac electricity in relay-type output modules.
RESISTOR AND CAPACITOR
a specific application of an interlock program is the ___ motor control
REVERSING
a ____ is a collection of program instructions in a single programming language such as ladder logic that provieds intructions to a controller
ROUTINE
the ____ is the area that displays the ladder logic for the routine
ROUTINE VIEW
____ contain the actual operating instruction (or executable code) that determines the operation of the controller
ROUTINES
the first step in troubleshooting the controllogix chassis power supply is ____
VERIFY THAT THE POWER SUPPLY IS ON
a normally closed auxiliary pushbutton is used with an ___ instruction to turn off a seal in logic output.
XIC
