DeviceNet: Test Your Knowledge with Multiple Choice Questions
Prepare to test your understanding of DeviceNet with a series of multiple choice questions. This comprehensive resource allows you to assess your knowledge and deepen your understanding of DeviceNet protocols and applications.
Perfect for students, professionals, and enthusiasts seeking to enhance their expertise in industrial networking.
What is the primary purpose of DeviceNet?
A. Data communication
B. Supplying power to devices
C. Networking
D. Both A and B
Answer: D
Explanation: DeviceNet is a network protocol used in the automation industry that provides both data communication and power supply to devices.
Which organization developed DeviceNet?
A. Siemens
B. Rockwell Automation
C. Schneider Electric
D. Beckhoff Automation
Answer: B
Explanation: DeviceNet was developed by Rockwell Automation, it is widely used in the industrial automation sector.
What communication model does DeviceNet use?
A. Producer/Consumer
B. Master/Slave
C. Client/Server
D. Peer-to-Peer
Answer: A
Explanation: DeviceNet uses a Producer/Consumer model. In this model, one device (the producer) creates or produces data that other devices (the consumers) can use.
Which protocol does DeviceNet operate on?
A. CAN (Controller Area Network)
B. TCP/IP
C. Modbus
D. Ethernet/IP
Answer: A
Explanation: DeviceNet is based on the CAN (Controller Area Network) protocol. This is a high-integrity serial data communications protocol which supports real-time control with a high level of security.
What is the maximum data rate of DeviceNet?
A. 125 Kbps
B. 250 Kbps
C. 500 Kbps
D. 1 Mbps
Answer: C
Explanation: The maximum data rate for DeviceNet is 500 Kbps (Kilobits per second).
How many nodes can be connected in a DeviceNet system?
A. 32
B. 64
C. 128
D. 256
Answer: B
Explanation: A DeviceNet network can connect up to 64 nodes or devices.
In DeviceNet, what term is used to describe the object that contains information about the device and its interaction with the network?
A. Device Object
B. Identity Object
C. Network Object
D. Interaction Object
Answer: B
Explanation: The Identity Object in DeviceNet contains important information about the device, such as the vendor ID, device type, product code, and more.
What type of cable is typically used in a DeviceNet system?
A. Twisted pair
B. Coaxial
C. Fiber optic
D. Ribbon
Answer: A
Explanation: Twisted pair cable is typically used in a DeviceNet system. The cable usually also includes power wires, allowing both power and signal to be transmitted over the same cable.
What is the maximum length of a DeviceNet network at 125 Kbps?
A. 100 meters
B. 250 meters
C. 500 meters
D. 1000 meters
Answer: C
Explanation: The maximum length of a DeviceNet network operating at 125 Kbps is 500 meters. The maximum distance decreases as the speed increases.
What is a “Group 2 only” server in the context of DeviceNet?
A. A device that can only send data
B. A device that can only receive data
C. A device that can both send and receive data, but only from one other device at a time
D. A device that can both send and receive data from multiple devices
Answer: B
Explanation: In DeviceNet, a “Group 2 only” server is a device that can only receive data. It is generally used for devices that need to monitor the status of the network or other devices, but do not need to send data themselves.
Which type of messaging does DeviceNet support?
A. Polled
B. Strobed
C. Cyclic
D. All of the above
Answer: D
Explanation: DeviceNet supports different types of messaging including Polled, Strobed, and Cyclic.
DeviceNet uses which physical layer for data transmission?
A. Ethernet
B. RS485
C. CAN
D. Modbus
Answer: C
Explanation: DeviceNet uses the Controller Area Network (CAN) physical layer for data transmission.
What is the primary advantage of using DeviceNet?
A. High data transfer rate
B. Simplified cabling
C. High security
D. None of the above
Answer: B
Explanation: DeviceNet simplifies cabling by providing power and communications over the same cable.
Which of the following is a disadvantage of DeviceNet?
A. Complex installation
B. Lower data rates compared to Ethernet-based protocols
C. Requires a master device
D. Both A and B
Answer: D
Explanation: DeviceNet has complex installation processes and offers lower data rates compared to Ethernet-based protocols.
The CAN in DeviceNet stands for what?
A. Central Access Node
B. Central Application Network
C. Controller Area Network
D. Controlled Access Node
Answer: C
Explanation: In DeviceNet, CAN stands for Controller Area Network.
DeviceNet networks use a trunk/drop line topology. What does this mean?
A. Devices are connected to a single, linear cable
B. Devices are connected to a main cable (the trunk) with individual cables (the drops)
C. Devices are all connected to a central point
D. None of the above
Answer: B
Explanation: A trunk/drop topology, used in DeviceNet, refers to a network where devices are connected to a main cable (trunk) via individual cables (drops).
Which version of DeviceNet supports Safety communication?
A. DeviceNet Safety
B. DeviceNet Secure
C. DeviceNet Safe
D. None of the above
Answer: A
Explanation: DeviceNet Safety is a version of DeviceNet that supports Safety communication.
DeviceNet uses which type of error-checking method?
A. Parity
B. Checksum
C. Cyclic Redundancy Check (CRC)
D. Hamming Code
Answer: C
Explanation: DeviceNet uses the Cyclic Redundancy Check (CRC) error-checking method.
What is the maximum drop line length for a DeviceNet network at 125 Kbps?
A. 5 meters
B. 6 meters
C. 10 meters
D. 11 meters
Answer: C
Explanation: The maximum drop line length for a DeviceNet network operating at 125 Kbps is 10 meters.
Which of the following DeviceNet baud rates supports the longest trunk line length?
A. 125 Kbps
B. 250 Kbps
C. 500 Kbps
D. 1 Mbps
Answer: A
Explanation: The 125 Kbps baud rate supports the longest trunk line length in a DeviceNet system. The maximum length decreases as the baud rate increases.
What does EDS stand for in DeviceNet?
A. Electronic Device Statement
B. Electronic Data Sheet
C. Electronic Device Sheet
D. Electronic Data Statement
Answer: B
Explanation: EDS in DeviceNet stands for Electronic Data Sheet. It is a text file used by network configuration tools to identify products and to commission them on a network.
Which organization maintains the DeviceNet and CAN specifications?
A. CAN in Automation (CiA)
B. The Open DeviceNet Vendor Association (ODVA)
C. International Electrotechnical Commission (IEC)
D. Institute of Electrical and Electronics Engineers (IEEE)
Answer: B
Explanation: The Open DeviceNet Vendor Association (ODVA) maintains the DeviceNet and CAN specifications.
What kind of power does DeviceNet supply?
A. AC power
B. DC power
C. Either AC or DC power
D. Neither AC nor DC power
Answer: B
Explanation: DeviceNet supplies DC power to devices.
What is the maximum trunk line length for a DeviceNet network at 500 Kbps?
A. 100 meters
B. 200 meters
C. 250 meters
D. 500 meters
Answer: A
Explanation: The maximum trunk line length for a DeviceNet network operating at 500 Kbps is 100 meters.
Which of the following is NOT a class in DeviceNet?
A. Discrete Input Class
B. Discrete Output Class
C. Analog Input Class
D. Security Class
Answer: D
Explanation: DeviceNet has no class named ‘Security Class’. It has Discrete Input Class, Discrete Output Class, and Analog Input Class among others.
DeviceNet uses a DRP mechanism for addressing. What does DRP stand for?
A. Dynamic Random Protocol
B. Device Reset Protocol
C. Dynamic Response Protocol
D. Duplicate MAC ID Detection and Ringing Protocol
Answer: D
Explanation: In DeviceNet, DRP stands for Duplicate MAC ID Detection and Ringing Protocol. It’s a mechanism to detect and report duplicate MAC IDs.
What does MAC ID represent in DeviceNet?
A. Machine Access Code
B. Media Access Control Identifier
C. Machine Access Control
D. None of the above
Answer: B
Explanation: In DeviceNet, MAC ID stands for Media Access Control Identifier. It is a unique identifier assigned to each device on the network.
In DeviceNet, what term is used to describe the path from the originating device to the destination device?
A. Route
B. Path
C. Channel
D. Link
Answer: B
Explanation: In DeviceNet, the term ‘Path’ is used to describe the route from the originating device to the destination device.
DeviceNet supports which type of data representation?
A. ASCII
B. Unicode
C. Binary
D. All of the above
Answer: D
Explanation: DeviceNet supports various data representations, including ASCII, Unicode, and Binary.
What is the main application of DeviceNet?
A. Office networking
B. Home networking
C. Industrial automation
D. Internet browsing
Answer: C
Explanation: DeviceNet is primarily used in industrial automation for connecting industrial electronic devices.
The connectors used in a DeviceNet system are typically which type?
A. BNC
B. RJ45
C. Mini-style and Micro-style
D. DB9
Answer: C
Explanation: DeviceNet systems typically use mini-style (5-pin) and micro-style (4-pin) connectors.
What are the three different sizes of DeviceNet cable?
A. Thick, Thin and Mid
B. Thick, Thin and Flat
C. Mid, Flat and Thin
D. Flat, Round and Thin
Answer: A
Explanation: DeviceNet cable comes in three sizes: Thick (for trunk lines), Thin (for drop lines) and Mid (a compromise between Thick and Thin).
Which version of DeviceNet allows devices to join or leave the network without interrupting network operation?
A. DeviceNet Safety
B. DeviceNet QuickConnect
C. DeviceNet HotPlug
D. None of the above
Answer: B
Explanation: DeviceNet QuickConnect allows devices to be quickly added or removed from the network without interrupting network operation.
Which physical layer standard does DeviceNet use?
A. ISO 11898-2
B. ISO 11898-1
C. ISO 11898-3
D. ISO 11898-4
Answer: A
Explanation: DeviceNet uses the ISO 11898-2 physical layer standard. This is also known as the high-speed CAN standard.
Which error-checking algorithm does DeviceNet use?
A. Checksum
B. Cyclic Redundancy Check
C. Parity
D. Error Correction Code
Answer: B
Explanation: DeviceNet uses the Cyclic Redundancy Check (CRC) error-checking algorithm to ensure the integrity of data.
What is the maximum number of I/O points that can be connected to a single DeviceNet network?
A. 2048
B. 4096
C. 8192
D. 16384
Answer: C
Explanation: A single DeviceNet network can connect up to 8192 I/O points.
How many priority levels are there in DeviceNet messaging?
A. 2
B. 3
C. 4
D. 5
Answer: B
Explanation: DeviceNet messaging has three priority levels: high, medium, and low.
What type of wire is typically used for DeviceNet drop lines?
A. Coaxial
B. Twisted pair
C. Single-conductor
D. None of the above
Answer: B
Explanation: Twisted pair wire is typically used for DeviceNet drop lines. It has good noise immunity and is suitable for industrial environments.
In DeviceNet, what term is used to describe a collection of attributes that provide a specific functionality?
A. Object
B. Service
C. Class
D. Instance
Answer: A
Explanation: In DeviceNet, the term ‘Object’ is used to describe a collection of attributes that provide a specific functionality.
What is the purpose of the Scanner in a DeviceNet system?
A. To check for errors
B. To coordinate data transfer between devices
C. To provide power to the network
D. None of the above
Answer: B
Explanation: In a DeviceNet system, the Scanner coordinates data transfer between devices. It initiates communication and manages the overall data flow.
In DeviceNet, what is the purpose of the “Adapter”?
A. To convert data formats
B. To translate messages between devices
C. To respond to messages from the Scanner
D. To distribute power to devices
Answer: C
Explanation: In a DeviceNet system, the Adapter’s role is to respond to messages from the Scanner.
What communication model does DeviceNet utilize?
A. Producer/Consumer
B. Client/Server
C. Master/Slave
D. Peer-to-peer
Answer: A
Explanation: DeviceNet utilizes the Producer/Consumer communication model, where devices (producers) generate data and other devices (consumers) use that data.
What is the maximum number of nodes that a DeviceNet network can support?
A. 32
B. 64
C. 128
D. 256
Answer: B
Explanation: A DeviceNet network can support up to 64 nodes.
What is the function of the “Group 2 Only Client” in DeviceNet?
A. To only send data
B. To only receive data
C. To both send and receive data
D. None of the above
Answer: A
Explanation: In DeviceNet, a “Group 2 Only Client” is a device that can only send data.
What is the role of the “Explicit Messaging” in DeviceNet?
A. To handle real-time control data
B. To handle non-time critical data
C. To manage error messages
D. None of the above
Answer: B
Explanation: Explicit Messaging in DeviceNet is used to handle non-time critical data such as configuration data or status information.
Which messaging type in DeviceNet requires a response from the recipient?
A. Polled Messaging
B. Change of State Messaging
C. Cyclic Messaging
D. Strobed Messaging
Answer: A
Explanation: In Polled Messaging, the Scanner polls each device in the network for data, and the device responds with its current status.
Which attribute in DeviceNet provides the health status of a device?
A. Status Attribute
B. Health Attribute
C. General Status Attribute
D. Device Health Attribute
Answer: C
Explanation: The General Status Attribute in a DeviceNet device provides information about the health status of the device.
What do the ‘Predefined Master/Slave Connection Sets’ in DeviceNet facilitate?
A. Quick and easy network setup
B. Detection of network errors
C. Efficient data transmission
D. Enhanced network security
Answer: A
Explanation: Predefined Master/Slave Connection Sets in DeviceNet are sets of pre-established connections between devices that facilitate quick and easy network setup.
What does the “Group 2 Only Server” in DeviceNet represent?
A. A device that can only send data
B. A device that can only receive data
C. A device that can both send and receive data
D. None of the above
Answer: B
Explanation: In DeviceNet, a “Group 2 Only Server” is a device that can only receive data.
Which of the following represents a method for error detection in DeviceNet?
A. Parity Checking
B. Cyclic Redundancy Check (CRC)
C. Error Guessing
D. All of the above
Answer: B
Explanation: DeviceNet uses the Cyclic Redundancy Check (CRC) method for error detection. CRC is a common technique for detecting data transmission errors.
In DeviceNet, which network topology is not supported?
A. Bus
B. Star
C. Ring
D. Tree
Answer: C
Explanation: DeviceNet supports Bus, Star, and Tree topologies. However, Ring topology is not supported.
Which of the following DeviceNet baud rates supports the longest cable length?
A. 125 kbps
B. 250 kbps
C. 500 kbps
D. 1 Mbps
Answer: A
Explanation: The lower the baud rate, the longer the cable length that can be supported. Thus, the 125 kbps baud rate supports the longest cable length in DeviceNet.
What type of communication does DeviceNet support?
A. Unicast
B. Broadcast
C. Multicast
D. All of the above
Answer: D
Explanation: DeviceNet supports Unicast (one-to-one), Broadcast (one-to-all), and Multicast (one-to-many) communication.
Which of the following is not a valid MAC ID in DeviceNet?
A. 0
B. 32
C. 64
D. 77
Answer: D
Explanation: MAC ID in DeviceNet can range from 0 to 63. Therefore, 77 is not a valid MAC ID.
What is the role of the CanKing software in DeviceNet?
A. Network configuration
B. Network diagnostics
C. Network simulation
D. All of the above
Answer: D
Explanation: CanKing is a software tool for DeviceNet that is used for network configuration, diagnostics, and simulation.
In DeviceNet, how many bytes can a single CAN message carry?
A. 4
B. 8
C. 16
D. 32
Answer: B
Explanation: A single CAN message in DeviceNet can carry up to 8 bytes of data.
What does the CAN in DeviceNet stand for?
A. Computer Area Network
B. Controller Area Network
C. Control Area Network
D. Communication Area Network
Answer: B
Explanation: In DeviceNet, CAN stands for Controller Area Network.
How many power conductors does a DeviceNet thick cable have?
A. 1
B. 2
C. 3
D. 4
Answer: B
Explanation: A DeviceNet thick cable has two power conductors and two signal conductors.
What does the term ‘Drop line’ refer to in DeviceNet?
A. A temporary loss in communication
B. A line connecting a device to the trunk line
C. A line connecting two devices directly
D. None of the above
Answer: B
Explanation: In DeviceNet, a ‘Drop line’ refers to a line that connects a device to the main trunk line.
In DeviceNet, how is a network managed when multiple devices try to transmit at the same time?
A. The device with the lowest MAC ID wins arbitration
B. The device with the highest MAC ID wins arbitration
C. The device which transmitted first wins arbitration
D. The device which transmitted last wins arbitration
Answer: A
Explanation: In DeviceNet, if multiple devices try to transmit at the same time, the device with the lowest MAC ID wins the arbitration and gets to transmit first.
Which OSI layer does DeviceNet correspond to?
A. Transport Layer
B. Network Layer
C. Data Link Layer
D. Physical Layer
Answer: C
Explanation: DeviceNet corresponds to both the Physical Layer and the Data Link Layer in the OSI model.
Which command in DeviceNet is used to write an attribute to an object?
A. GET Attribute Single
B. SET Attribute Single
C. GET Attribute All
D. SET Attribute All
Answer: B
Explanation: In DeviceNet, the “SET Attribute Single” command is used to write an attribute to an object.
What is the purpose of a terminator in a DeviceNet network?
A. To prevent data loss
B. To prevent signal reflection
C. To increase signal strength
D. None of the above
Answer: B
Explanation: Terminators in a DeviceNet network are used to prevent signal reflection which can distort the data on the network.
Which organization developed and maintains the DeviceNet standard?
A. IEEE
B. ISO
C. ODVA
D. IEC
Answer: C
Explanation: The DeviceNet standard is developed and maintained by the ODVA (Open DeviceNet Vendor Association).
Which protocol is used in DeviceNet for time synchronization?
A. SNTP
B. PTP
C. NTP
D. DeviceNet Time Sync
Answer: D
Explanation: DeviceNet uses a protocol called DeviceNet Time Sync for synchronization of time across devices on the network.
What is the purpose of “Explicit Messaging” in DeviceNet?
A. To perform routine control operations
B. To handle non-routine operations
C. To handle real-time control data
D. None of the above
Answer: B
Explanation: In DeviceNet, Explicit Messaging is used to handle non-routine operations such as configuring a device or fetching status information.
Which of the following represents the data transmission method in DeviceNet?
A. Synchronous
B. Asynchronous
C. Both Synchronous and Asynchronous
D. None of the above
Answer: B
Explanation: DeviceNet uses Asynchronous data transmission, where data can be sent at any time without the need for synchronization with the receiver.
What is the purpose of the Object Dictionary in a DeviceNet device?
A. To store the device’s configuration data
B. To store the device’s operational data
C. To define the device’s capabilities and behaviors
D. All of the above
Answer: D
Explanation: The Object Dictionary in a DeviceNet device is a data structure that defines the device’s capabilities and behaviors, and stores its configuration and operational data.
In DeviceNet, which term describes a functional group of devices?
A. Network
B. Group
C. Segment
D. Cluster
Answer: D
Explanation: In DeviceNet, the term ‘Cluster’ is used to describe a functional group of devices.
In DeviceNet, what is the standard voltage level of the power supply?
A. 5V
B. 12V
C. 24V
D. 48V
Answer: C
Explanation: The standard voltage level of the power supply in a DeviceNet system is 24V DC.
What is the purpose of the “I/O Messaging” in DeviceNet?
A. To handle configuration data
B. To handle real-time control data
C. To manage error messages
D. None of the above
Answer: B
Explanation: In DeviceNet, I/O Messaging is used to handle real-time control data, providing rapid exchanges of data between devices.
In DeviceNet, how many priority levels are there for communication?
A. 3
B. 4
C. 5
D. 6
Answer: A
Explanation: DeviceNet has three priority levels for communication – high, medium, and low. This helps in managing network traffic more efficiently.
What is the maximum number of bytes that can be transmitted in a single DeviceNet message?
A. 8 bytes
B. 64 bytes
C. 128 bytes
D. 256 bytes
Answer: A
Explanation: A single DeviceNet message can transmit a maximum of 8 bytes of data.
In DeviceNet, what does the term “Fragmentation” refer to?
A. Breaking down a large message into smaller messages
B. Combining several small messages into a larger message
C. Converting a message into a different format
D. None of the above
Answer: A
Explanation: In DeviceNet, “Fragmentation” refers to the process of breaking down a large message into smaller messages that can fit within the network’s message size limitations.
Which DeviceNet object provides information about the device’s identity?
A. Identity Object
B. Information Object
C. Device Object
D. Status Object
Answer: A
Explanation: The Identity Object in DeviceNet provides information about the device’s identity, such as vendor ID, device type, product code, etc.
What is the role of the “Configuration Manager” in a DeviceNet network?
A. To manage the network configuration
B. To configure individual devices
C. To manage device communication
D. All of the above
Answer: D
Explanation: In a DeviceNet network, the Configuration Manager is responsible for managing the network configuration, configuring individual devices, and managing device communication.
In DeviceNet, what does the “Change of State” message indicate?
A. A device has been added to the network
B. A device has been removed from the network
C. A change in the value of a device’s status attribute
D. All of the above
Answer: C
Explanation: In DeviceNet, a “Change of State” message indicates a change in the value of a device’s status attribute.
Which DeviceNet object is used to manage the connections between devices?
A. Connection Object
B. Network Object
C. Device Object
D. Interface Object
Answer: A
Explanation: The Connection Object in DeviceNet is used to manage the connections between devices on the network.
In a DeviceNet network, how are collisions resolved?
A. By using a token passing mechanism
B. By using collision detection and backoff algorithms
C. By the device with the lowest MAC ID
D. None of the above
Answer: B
Explanation: In a DeviceNet network, collisions are resolved using collision detection and backoff algorithms.
Which DeviceNet object provides a means for a device to alert the network about a specific condition?
A. Event Object
B. Alert Object
C. Alarm Object
D. Signal Object
Answer: C
Explanation: The Alarm Object in DeviceNet provides a means for a device to alert the network about a specific condition.
What is the significance of the “Predefined Master/Slave Connection Set” in DeviceNet?
A. It allows easy setup of connections between devices
B. It assigns predefined roles to devices
C. It predefines the network topology
D. All of the above
Answer: A
Explanation: The Predefined Master/Slave Connection Set in DeviceNet allows easy setup of connections between devices without the need for extensive configuration.
What is the maximum number of nodes that can be present on a DeviceNet network?
A. 32
B. 64
C. 128
D. 256
Answer: B
Explanation: A DeviceNet network can support a maximum of 64 nodes.
What does the term “Producer/Consumer” model refer to in DeviceNet?
A. A model for data transmission and reception
B. A model for network configuration
C. A model for error handling
D. None of the above
Answer: A
Explanation: The Producer/Consumer model in DeviceNet refers to a data communication model where one device (the producer) generates data and one or more devices (the consumers) consume the data.
In DeviceNet, what does the “Device Heartbeat” refer to?
A. A message sent by a device to indicate it is operational
B. A message sent by a device to indicate it is not operational
C. A message sent by a device to request data
D. None of the above
Answer: A
Explanation: In DeviceNet, the “Device Heartbeat” refers to a periodic message sent by a device to indicate that it is operational.
What is the purpose of “Group 2 Only” devices in DeviceNet?
A. They can only send data
B. They can only receive data
C. They can send and receive data but cannot initiate communication
D. They can initiate communication but cannot send or receive data
Answer: C
Explanation: “Group 2 Only” devices in DeviceNet can send and receive data but cannot initiate communication. They respond only to explicit messages from other devices.
What is the primary purpose of “Device Profiles” in DeviceNet?
A. To define device behavior and capabilities
B. To handle real-time control data
C. To manage network communication
D. None of the above
Answer: A
Explanation: “Device Profiles” in DeviceNet are used to define the behavior and capabilities of a device, such as its data objects and services.
Which of the following is not a type of DeviceNet connector?
A. 5-pin MINI
B. M12
C. RJ45
D. D-sub
Answer: C
Explanation: RJ45 is not a type of connector used in DeviceNet. The standard connectors are 5-pin MINI, M12, and D-sub.
In DeviceNet, what does a “Class” represent?
A. A category of devices with similar capabilities
B. A group of devices on the network
C. A level of network communication
D. None of the above
Answer: A
Explanation: In DeviceNet, a “Class” represents a category of devices with similar capabilities.
In DeviceNet, what is the role of the “Network Layer”?
A. To handle physical signal transmission
B. To provide error detection and correction
C. To manage data link control
D. To manage routing and addressing
Answer: D
Explanation: The Network Layer in DeviceNet is responsible for managing routing and addressing in the network.
What is the role of the “Application Layer” in DeviceNet?
A. To manage network configuration
B. To handle user interactions with the network
C. To manage device communication
D. All of the above
Answer: D
Explanation: The Application Layer in DeviceNet is responsible for managing network configuration, handling user interactions with the network, and managing device communication.
What does “UCMM” stand for in the context of DeviceNet?
A. Unconnected Message Manager
B. Universal Communication Management Module
C. Unconditional Message Management
D. None of the above
Answer: A
Explanation: In the context of DeviceNet, “UCMM” stands for Unconnected Message Manager. It is used to manage the delivery of messages between devices that do not have a pre-established connection.
Which DeviceNet object is used to handle a group of related attributes in a device?
A. Attribute Object
B. Group Object
C. Collection Object
D. None of the above
Answer: B
Explanation: The Group Object in DeviceNet is used to handle a group of related attributes in a device.
What does a “MAC ID” represent in a DeviceNet network?
A. The network address of a device
B. The serial number of a device
C. The type of a device
D. The vendor of a device
Answer: A
Explanation: In a DeviceNet network, a “MAC ID” represents the network address of a device. Each device on the network has a unique MAC ID.
In DeviceNet, what is the purpose of the “Device Subnet” identifier?
A. To identify the network to which a device belongs
B. To identify the vendor of a device
C. To identify the type of a device
D. None of the above
Answer: A
Explanation: In DeviceNet, the “Device Subnet” identifier is used to identify the network to which a device belongs.
What is the maximum transmission distance in a DeviceNet network at a data rate of 125 Kbps?
A. 100 meters
B. 200 meters
C. 500 meters
D. 1000 meters
Answer: C
Explanation: At a data rate of 125 Kbps, the maximum transmission distance in a DeviceNet network is 500 meters.
In DeviceNet, which term describes the maximum amount of time that a device can wait before receiving a response to its message?
A. Timeout
B. Backoff
C. Latency
D. Delay
Answer: A
Explanation: In DeviceNet, the term “Timeout” describes the maximum amount of time that a device can wait before receiving a response to its message.
What is the function of the “Adapter” device in DeviceNet?
A. To convert signals from one format to another
B. To connect devices to the network
C. To manage network communication
D. None of the above
Answer: B
Explanation: The “Adapter” device in DeviceNet is used to connect devices to the network.
What is the role of the “Master” device in DeviceNet?
A. To initiate communication on the network
B. To respond to communication on the network
C. To manage network configuration
D. All of the above
Answer: A
Explanation: The “Master” device in DeviceNet has the role of initiating communication on the network.
What is the role of the “Slave” device in DeviceNet?
A. To initiate communication on the network
B. To respond to communication on the network
C. To manage network configuration
D. All of the above
Answer: B
Explanation: The “Slave” device in DeviceNet has the role of responding to communication initiated by the “Master” device on the network.
Which DeviceNet message type is used for non-critical data that does not require an immediate response?
A. I/O Messaging
B. Explicit Messaging
C. Implicit Messaging
D. Poll Messaging
Answer: B
Explanation: Explicit Messaging in DeviceNet is used for non-critical data that does not require an immediate response. This type of messaging is typically used for configuration data, device control, and status reporting.
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