SACA C-207 QUESTIONS AND ANSWERS
Communications _________ are software programs that connect the hardware of a
PLC (I/O modules, processor, etc.) to a network and allows them to communicate with
other devices. - Answer -Drivers
PLC Project files contain which of the following? - Answer -ladder logic programs
hardware configuration
tags and communication configuration
PLCs store the information status of input and output modules by assigning each
terminal on the module a specific place in memory called a ___________. - Answer -
Tag
The part of a PLC that executes the logic program is the ___________. - Answer -
Proccesor
The power supply located in the chassis or backplane should only be used to power the
PLC modules. - Answer -True
What are you doing if you are adding or deleting instructions, changing tags, addresses,
descriptions, or logic functions while in a PLC Program? - Answer -Editing the program
Using the I/O diagram below, if Switch SW-3 was on, which status indicator on the PLC
input module in slot 1 would be on? - Answer -2
When voltage is applied to the terminal Local:1:I:Data.0 of an active high PLC input
module, an XIO instruction with the same address will be ________________. -
Answer -False
When voltage is applied to the terminal Local:1:I:Data.1 of a PLC input module, an XIC
instruction with the same address will be _________________. - Answer -True
You created a new project file, gave it a name, set up the controller configuration, and
set up the I/O configuration. What is the next step you should take if you want to enter
the ladder logic routine? - Answer -Open the program editor and add rungs
PLC input/output diagrams are used to show the specific physical connections between
the ____________________ and the PLC I/O terminals. - Answer -Real world devices
Given the information below, which output will cause the motor to run in the Forward
direction? - Answer -Local:4:O.Data.0
If you want the Jog switch to be active ONLY in Manual mode, what tag address needs
to be applied to the XIC instruction in the last rung? - Answer -Local:1:I.Data.7
, In the Power Diagram below, if the motor runs in the Forward direction, the screw
moves to the right. If the motor runs in the reverse direction, the screw moves to the left.
Which switch controls the Reverse limit? - Answer -LS2
One of the advantages of a PLC is that it permits many instructions to be controlled by
one _________. - Answer -Tag or address
Tags with a DINT data type contain ____________ bit(s). - Answer -32
The most common method of controlling a motor with a PLC is to use what? - Answer -
A motor starter
What function do the highlighted instructions perform in this program? - Answer -
Program interlocking
What would happen if PB3 failed to close when pressed? - Answer -the door would
move up, but not down
When the address Local:1:I.Data.0 contains a 0, which statement below is true? -
Answer -
Which one of these statements is NOT a way to determine if an input is on or off? -
Answer -all of these are ways
A discrete input module uses 12VDC as its voltage level.
A normally open limit switch is wired to a terminal.
If the module is Active High, what value would a technician expect to see at the terminal
if the limit switch is closed (one lead on terminal, other lead on common terminal of the
module) - Answer -12V DC
The six basic components of most PLC's are the power supply, the input modules, the
output modules, chassis, processor, and the ______________. - Answer -
Programming Device
The two most popular communication protocols used with PLCs are Ethernet and
________________. - Answer -Universal serial bus (USB)
Typically, a USB driver will not automatically start when the programming device detects
the connection and needs to be configured using specific software. - Answer -False
USB, or _________________ commuication requires a cable connection from the
programming device to the PLC controller module. - Answer -Serial
Which is proper sequence of operation within a PLC? - Answer -Examine inputs,
perform logic, update outputs
Communications _________ are software programs that connect the hardware of a
PLC (I/O modules, processor, etc.) to a network and allows them to communicate with
other devices. - Answer -Drivers
PLC Project files contain which of the following? - Answer -ladder logic programs
hardware configuration
tags and communication configuration
PLCs store the information status of input and output modules by assigning each
terminal on the module a specific place in memory called a ___________. - Answer -
Tag
The part of a PLC that executes the logic program is the ___________. - Answer -
Proccesor
The power supply located in the chassis or backplane should only be used to power the
PLC modules. - Answer -True
What are you doing if you are adding or deleting instructions, changing tags, addresses,
descriptions, or logic functions while in a PLC Program? - Answer -Editing the program
Using the I/O diagram below, if Switch SW-3 was on, which status indicator on the PLC
input module in slot 1 would be on? - Answer -2
When voltage is applied to the terminal Local:1:I:Data.0 of an active high PLC input
module, an XIO instruction with the same address will be ________________. -
Answer -False
When voltage is applied to the terminal Local:1:I:Data.1 of a PLC input module, an XIC
instruction with the same address will be _________________. - Answer -True
You created a new project file, gave it a name, set up the controller configuration, and
set up the I/O configuration. What is the next step you should take if you want to enter
the ladder logic routine? - Answer -Open the program editor and add rungs
PLC input/output diagrams are used to show the specific physical connections between
the ____________________ and the PLC I/O terminals. - Answer -Real world devices
Given the information below, which output will cause the motor to run in the Forward
direction? - Answer -Local:4:O.Data.0
If you want the Jog switch to be active ONLY in Manual mode, what tag address needs
to be applied to the XIC instruction in the last rung? - Answer -Local:1:I.Data.7
, In the Power Diagram below, if the motor runs in the Forward direction, the screw
moves to the right. If the motor runs in the reverse direction, the screw moves to the left.
Which switch controls the Reverse limit? - Answer -LS2
One of the advantages of a PLC is that it permits many instructions to be controlled by
one _________. - Answer -Tag or address
Tags with a DINT data type contain ____________ bit(s). - Answer -32
The most common method of controlling a motor with a PLC is to use what? - Answer -
A motor starter
What function do the highlighted instructions perform in this program? - Answer -
Program interlocking
What would happen if PB3 failed to close when pressed? - Answer -the door would
move up, but not down
When the address Local:1:I.Data.0 contains a 0, which statement below is true? -
Answer -
Which one of these statements is NOT a way to determine if an input is on or off? -
Answer -all of these are ways
A discrete input module uses 12VDC as its voltage level.
A normally open limit switch is wired to a terminal.
If the module is Active High, what value would a technician expect to see at the terminal
if the limit switch is closed (one lead on terminal, other lead on common terminal of the
module) - Answer -12V DC
The six basic components of most PLC's are the power supply, the input modules, the
output modules, chassis, processor, and the ______________. - Answer -
Programming Device
The two most popular communication protocols used with PLCs are Ethernet and
________________. - Answer -Universal serial bus (USB)
Typically, a USB driver will not automatically start when the programming device detects
the connection and needs to be configured using specific software. - Answer -False
USB, or _________________ commuication requires a cable connection from the
programming device to the PLC controller module. - Answer -Serial
Which is proper sequence of operation within a PLC? - Answer -Examine inputs,
perform logic, update outputs
