PLC 2 Study Guide

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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


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