Comunicaciones en ControlNet
ControlNet Network Overview
ControlNet is an open, industrial, real-time control-layer network that provides high-speed transport of both time-critical I/O and interlocking data and messaging data, including upload/download of programming and configuration data on a single physical media link. The ControlNet network's highly efficient data transfer capability significantly enhances I/O performance and peer-to-peer communication in any system or application where it is used.
ControlNet is highly deterministic and repeatable, and remains unaffected as devices are connected or disconnected from the network. This ensures dependable, synchronized, and coordinated real-time performance. The ControlNet network is most often used in these types of configurations:
As the default network for the ControlLogix platform.
As a substitute/replacement for the Remote I/O (RIO) network, because ControlNet handles large numbers of I/O points well.
As a backbone to multiple distributed DeviceNet networks.
As a peer interlocking network.
Rockwell Automation offers a full array of ControlNet products, including controllers, I/O, operator interfaces, media, drives, motion control, and software. We have the products and know-how you need to set up a new ControlNet system, and the products and innovations you need to maintain and grow your existing applications. Flexible installation options for the ControlNet network include:
Fiber media for optical isolation from noise and distances up to 20 km.
Redundant Media Option helps ensure that a system can maintain operation during a cable fault condition.
Intrinsic Safety Option lets you install a ControlNet network in hazardous, explosive locations. Choose between either long-distance fiber or low-cost coax options to span between hazardous and non-hazardous areas.
Benefits
Implements programming, processor-to-processor, and I/O control on the same link without impacting time-critical I/O.
Media redundancy and intrinsically-safe options.
Provides the functions of the Data Highway Plus and Universal Remote I/O networks at a 5M-bit/s rate.
Offers high-speed data throughput, which improves I/O performance and controller-to-controller interlocking.
Supports a maximum of 99 nodes, with no minimum distance between them.
Lets you access the network from any node for PLC processor programming and troubleshooting.
Multicast of both inputs and peer-to-peer data for reduced programming.
Incorporates improved system diagnostics, which make it easier to configure and maintain.
Has finer granularity of I/O.
Gives you deterministic, repeatable transfers of data to/from digital and analog I/O.
Lets you select I/O and PLC processor interlocking update times that match your application requirements.
Eliminates block-transfer programming.
Is compatible with a range of current Allen-Bradley products, and will be compatible with more in the future.
Provides operation through high-noise environment with fiber-optic segments.
Messages from/to a node on one ControlNet link can be routed through the ControlLogix gateway to/from a node on either another ControlNet link, a DH+ link, or an EtherNet/IP link.
Product Design
The ControlNet network is simple and cost-effective to install, and offers you many flexible installation options, such as PLC processors with built-in ControlNet scanners, ControlNet bridges and adapters for I/O chassis, and ControlNet computer interfaces for personal computers. Although the ControlNet network is based on bus technology, you can use repeaters to implement ring, and star topologies. You can also install optional redundant media. The ControlNet processors include ports that let you share data between a ControlNet network and your already installed Data Highway Plus and Universal Remote I/O networks.
The ControlNet network transfers scheduled data at 5M bit/s, which improves both I/O performance and processor-to-processor communication. Its flexible control system architecture can work with multiple processors, and you can install up to 99 addressable nodes (via taps) anywhere along the trunk cable of a ControlNet link. There is no minimum tap separation, and you can access the ControlNet network from every node (including adapters).
Types of devices that communicate on the ControlNet link include: controllers, I/O, HMIs, PCs, drives, coordinated drive systems, weld control, motion control, vision systems, transducers, and valve manifolds.
In addition, a ControlNet network can be configured using a bus/trunkline, star, or ring topology.
ControlNet is an open, industrial, real-time control-layer network that provides high-speed transport of both time-critical I/O and interlocking data and messaging data, including upload/download of programming and configuration data on a single physical media link. The ControlNet network's highly efficient data transfer capability significantly enhances I/O performance and peer-to-peer communication in any system or application where it is used.
ControlNet is highly deterministic and repeatable, and remains unaffected as devices are connected or disconnected from the network. This ensures dependable, synchronized, and coordinated real-time performance. The ControlNet network is most often used in these types of configurations:
As the default network for the ControlLogix platform.
As a substitute/replacement for the Remote I/O (RIO) network, because ControlNet handles large numbers of I/O points well.
As a backbone to multiple distributed DeviceNet networks.
As a peer interlocking network.
Rockwell Automation offers a full array of ControlNet products, including controllers, I/O, operator interfaces, media, drives, motion control, and software. We have the products and know-how you need to set up a new ControlNet system, and the products and innovations you need to maintain and grow your existing applications. Flexible installation options for the ControlNet network include:
Fiber media for optical isolation from noise and distances up to 20 km.
Redundant Media Option helps ensure that a system can maintain operation during a cable fault condition.
Intrinsic Safety Option lets you install a ControlNet network in hazardous, explosive locations. Choose between either long-distance fiber or low-cost coax options to span between hazardous and non-hazardous areas.
Benefits
Implements programming, processor-to-processor, and I/O control on the same link without impacting time-critical I/O.
Media redundancy and intrinsically-safe options.
Provides the functions of the Data Highway Plus and Universal Remote I/O networks at a 5M-bit/s rate.
Offers high-speed data throughput, which improves I/O performance and controller-to-controller interlocking.
Supports a maximum of 99 nodes, with no minimum distance between them.
Lets you access the network from any node for PLC processor programming and troubleshooting.
Multicast of both inputs and peer-to-peer data for reduced programming.
Incorporates improved system diagnostics, which make it easier to configure and maintain.
Has finer granularity of I/O.
Gives you deterministic, repeatable transfers of data to/from digital and analog I/O.
Lets you select I/O and PLC processor interlocking update times that match your application requirements.
Eliminates block-transfer programming.
Is compatible with a range of current Allen-Bradley products, and will be compatible with more in the future.
Provides operation through high-noise environment with fiber-optic segments.
Messages from/to a node on one ControlNet link can be routed through the ControlLogix gateway to/from a node on either another ControlNet link, a DH+ link, or an EtherNet/IP link.
Product Design
The ControlNet network is simple and cost-effective to install, and offers you many flexible installation options, such as PLC processors with built-in ControlNet scanners, ControlNet bridges and adapters for I/O chassis, and ControlNet computer interfaces for personal computers. Although the ControlNet network is based on bus technology, you can use repeaters to implement ring, and star topologies. You can also install optional redundant media. The ControlNet processors include ports that let you share data between a ControlNet network and your already installed Data Highway Plus and Universal Remote I/O networks.
The ControlNet network transfers scheduled data at 5M bit/s, which improves both I/O performance and processor-to-processor communication. Its flexible control system architecture can work with multiple processors, and you can install up to 99 addressable nodes (via taps) anywhere along the trunk cable of a ControlNet link. There is no minimum tap separation, and you can access the ControlNet network from every node (including adapters).
Types of devices that communicate on the ControlNet link include: controllers, I/O, HMIs, PCs, drives, coordinated drive systems, weld control, motion control, vision systems, transducers, and valve manifolds.
In addition, a ControlNet network can be configured using a bus/trunkline, star, or ring topology.
Communication
The ControlNet network provides the functions of the Allen Bradley Data Highway Plus and Universal Remote I/O networks at a 5M-bit/s rate. Multiple processors can each control their own assigned outputs on a single common ControlNet link and monitor all inputs on the link. Any processor on the link can send a message to any other processor on the link.
Messages from a node on one ControlNet link can be routed through the ControlLogix gateway to a node on either another ControlNet link, a DeviceNet link, a DH+ link, or an EtherNet/IP link.
The ControlNet network provides the functions of the Allen Bradley Data Highway Plus and Universal Remote I/O networks at a 5M-bit/s rate. Multiple processors can each control their own assigned outputs on a single common ControlNet link and monitor all inputs on the link. Any processor on the link can send a message to any other processor on the link.
Messages from a node on one ControlNet link can be routed through the ControlLogix gateway to a node on either another ControlNet link, a DeviceNet link, a DH+ link, or an EtherNet/IP link.
ControlNet I/O
Rockwell Automation's I/O family provides world-class I/O products for virtually every ControlNet application need. See the ControlNet Compatible Products for more information about our distributed modular and chassis-based I/O options.
Typical Applications
The ControlNet network is well-suited to applications that include high-speed digital I/O and/or remote analog I/O, such as:
Automotive transfer lines, paint shops, and assembly lines.
Water/wastewater.
Food processing.
Pharmaceutical.
Test stands.
Sectional conveyors.
Discrete-part machines.
Filter presses.
Baggage handling.
Most other high-speed applications that require highly synchronized control, high throughput and speed, high I/O count, distribution across large geographic distances, real-time performance.
