Communication is the core platform Allen Bradley ControlLogix PLC. The networks are available for a ControlLogix rack.

EtherNet / IP

ControlNet

DeviceNet

DH +

Modbus

You can configure your system for exchanging information between a wide range Device
and computing platforms and operating systems.

EtherNet / IP

Industrial Ethernet Protocol (Ethernet / IP) is a standard industrial network that supports both real / S-time messaging and message exchange. This is a high-speed network and as no timetable. Ethernet tends to be used as a communication link between the PLC and HMI / SCADA.

The Ethernet network can also be used for monitoring and programming of the PLC on the network using of the RSLogix software products.

ControlNet network.

The ControlNet network is an open process, the state of the art control network that meets the requirements real-time, high-performance applications. The ControlNet network uses the proven Common Industrial Protocol (CIP) to combine the functionality of I / S network and a peer-to-peer network provide high speed performance of these functions. The ControlNet network provides deterministic, repeatable transfers of all mission data critical control addition to supporting transfers of non-time-critical data.

ControlNet tends to be used for I / S and applications of remote PLC to PLC communications. Due to the fact that deterministic ControlNet is a timetable for the network must be created. The calendar is created with the software package RSNetWorx.

A ControlNet network also can be used in a non-programmed way to monitor and program PLC 's in the network using the RSLogix 5000 programmer.

Each Ethernet device require an IP address, and each device will require ControlNet node number from 0 to 99. A calendar should be created for the ControlNet network that is created RSNetWorx the program for ControlNet. This is explained in the manual section ControlNet

DeviceNet network.

The DeviceNet network is an open network of low that provides connections between simple industrial devices (such as sensors and actuators) and high level devices (such as PLC controllers and computers). The DeviceNet network uses the proven Common Industrial Protocol (CIP) to provide control, configuration and data collection capabilities for industrial devices. The DeviceNet network is a flexible network that works with devices from multiple vendors.

DeviceNet is commonly used to communicate to the plant I / O and variable speed drives.

A configuration file is required by the DeviceNet module that is created and download the software package for DeviceNet RSNetWorx

About the Author:

Author is and Automation training company www.dat.co.uk , who offer a wide range of Automation course for PLC’s (Programmable Logic Controllers), SCADA and HMI systems and variable speed drives.

Article Source: ArticlesBase.com – Selecting a Allen Bradley Controllogix Network

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