Access method: The bus topology network needs some controlling techniques for access of particular devices to the bus. For transmitting information, a Programmable Logic Controller (PLC) will access the network by using access method. The most common access methods include token passing, collision detection, and polling. DH+: The Allen-Bradley Data highway networks mainly have two communication network products such as Data Highway plus (DH+) and DH-485. DH+ makes use of peer-to-peer network in which a data communication system is formed by integrating programmable controllers and computers together. DH+ refers to a local area network that is used for factory-floor applications.

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Chapter 14, Problem 35RQ

Program Plan Intro

Access method:

The bus topology network needs some controlling techniques for access of particular devices to the bus.

For transmitting information, a Programmable Logic Controller (PLC) will access the network by using access method.

The most common access methods include token passing, collision detection, and polling.

DH+:

The Allen-Bradley Data highway networks mainly have two communication network products such as Data Highway plus (DH+) and DH-485.

DH+ makes use of peer-to-peer network in which a data communication system is formed by integrating programmable controllers and computers together.

DH+ refers to a local area network that is used for factory-floor applications.

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