PLC 2 Study Guide
What is the purpose of a safety interlock?
Detect unsafe machine conditions
Which industrial network level is responsible for storing production data?
Operations level
How many bits does an IP address contain?
32
What is the next step to follow after assigning the HMI panel's IP address?
Verify the HMI device's IP address using configuration software
Which of the following is a commonly used industrial protocol?
TCP
In a 4-step clamp-and-drill sequence, what triggers each step?
Limit switches
Which machine mode allows the operator to operate individual actuators and test or troubleshoot machine operation?
Manual
The generator can be turned on by turning on a PLC output or by using a __________ on the pneumatic DCV.
Manual override
Power is turned on by an external power switch to a Human Machine Interface (HMI) panel that communicates with a __________.
PLC
The operation of a pick-and-place feeding station typically combines the use of a __________ and a pick- and-place manipulator.
Powered parts feeder
Which of the following is true for a Static screen object?
It does not interact with the PLC
Manipulators use non-touch sensors most often, like the __________.
Magnetic reed
What is the most basic type of network connection between an HMI panel and a PLC?
Point-to-Point
What is the specific order in which machine actions are performed called?
Sequence
Three types of material feeding systems used in manufacturing are ASRS, __________, and non-servo pick- and-place manipulators.
Servo robot
Pick-and-place manipulators are non-servo devices that use pneumatic actuators to move parts from one place to another.
True
In a three-step paint mixing time-driven sequence program, what is the minimum number of timer instructions that must be used?
Two
What switch requires no setup or port setting to use?
Unmanaged Ethernet switch
The vacuum switch signals that vacuum is not sufficient when connected to a __________.
Vacuum gripper
Which of the following should be done prior to downloading an HMI project?
Validate the HMI project configuration
A typical powered parts feeder includes a single-solenoid DCV, a __________ to dispense parts, and a chute to hold the parts.
Double-acting cylinder
In a single-cycle reciprocating program, what does the cylinder do when the Start pushbutton is pressed?
Extends and Retracts
In a continuous-cycle reciprocating program, what does the cylinder do when the Start pushbutton is pressed?
Extends, Retracts, and repeats the cycle
A powered parts feeder typically includes a __________, a cylinder to push the part out to the pickup location, and a sensor to indicate when there are no more parts.
Gravity feed chute
Which of the following is downloaded to HMI memory from the PC?
HMI program
What type of device does an HMI panel replace in a PLC controlled process?
Hard-wired operator control panel
At the operations level of industrial internet what is not critical?
Time
Which program uses a combination of sensors and switches, is used when actuator positioning is not possible, and is based on minutes and seconds?
Time driven sequence
What activates each step of a time-driven sequence?
Timer
TCP/IP defines data packaging and how the internet protocol (IP) identifies __________.
Devices
Which of the following does a robot need to connect directly to an industrial network?
All of the above
A multi-point network allows for more than one PLC to connect with __________.
An HMI
The gripping or holding force of the vacuum gripper relies on __________.
Cup size and amount of vacuum applied (A and B)
A vacuum switch converts a sensed pressure or vacuum into a(n) __________ signal that can be used as an input to a controller.
Discrete
Which type of stop should never be programmed into the PLC logic program?
Emergency stop
The wrong IP address, an invalid range of IP addresses, and an incorrect default gateway will all stop robot communications on this type of network.
Ethernet network
The unmanaged switch does not direct traffic but sends packets and does this.
Reads MAC addresses
Which network topology uses a central network switch to control all traffic?
Star
What type of object is used for a screen navigation button?
Static button object
An HMI project software file contains screen objects and __________.
Tags
How is a PC's IP address changed?
The Network Properties screen
What can be accomplished with a PC connected to the HMI?
The program can be loaded into the HMI.
Typically, what is the first step of the 7-step design process in developing a PLC program?
Write a general sequence of operation
