ControlLogix

ControlLogix

ControlLogix sets a new standard for the process controllers to provide the high performance your application requires in an easy-to-use environment. The ControlLogix controller, with memory options ranging up to 8M bytes, supports intensive process applications and provides fast processing of motion applications. The memory options allow you to specify the appropriate controller for your application. No processor is needed to perform bridging and routing of I/O and, as your system grows, the network permits distributing control to additional chassis.

Benefits

• Modular, high-performance control platform suited for sequential, process, drive, and motion control —Every ControlLogix processor can perform multiple control tasks, reducing the number of controllers you need, so troubleshooting is faster. Multiple periodic tasks can be triggered differently to achieve higher levels of performance.
• Mix multiple processors, networks and I/O without restriction —The high performance of the ControlLogix platform is due in part to the ControlLogix backplane which operates as a very fast NetLinx network. ControlLogix processors, I/O and communication modules have the intelligence to act like independent nodes on that network.
• Connects to the NetLinx Open Network Architecture—Communicate information seamlessly throughout the plant, from shop floor to top floor, and to and from the Internet for e-business applications.
• Wide range of I/O modules—Analog, digital and specialty I/O modules meet your application demands.

Product Design

The multi-tasking operating system used in all ControlLogix processors supports 32 configurable continuous or periodic tasks that can be prioritized for executing the program code according to the application. Up to 32 programs, each with its own local data and logic may be assigned to a task, allowing virtual machines to operate independently within the same processor.    Symbolic addressing (compliant with IEC 1131-3) lets you identify data by its use in the application, independent of the hardware. You can create libraries of standard routines that can be re-used on multiple machines or applications. User-defined structures and arrays allow data to be structured to fit the application. RSLogix 5000 software provides complete programming and configuration support.   The ControlLogix processor module can be placed into any slot of a ControlLogix I/O chassis and multiple processor modules can be plugged into the same backplane. These processors can communicate with each other over the backplane (just as processors can communicate over networks) but otherwise operate independently. 

ControlLogix processors provide modular user memory (750K through 8M bytes) and can address a large amount of I/O (4,000 analog or 128,000 digital I/O maximum). They are capable of controlling local I/O and remotely located I/O. The maximum number of I/O locations (connections) remote from a single processor is 250. The processor can monitor/control these I/O across EtherNet/IP, ControlNet, DeviceNet, and Universal Remote I/O links.

With multiple processor modules in a ControlLogix I/O chassis (not applicable in a Redundant System) or even within a ControlNet network, all processors can read the input values from all input modules. Any single processor can control any particular output module. You configure the system to specify which processor is to control each output module.

Communication
With the exception of an RS-232 (DF1/DH-485 protocol) port built into the processor, interfacing with communication networks is modular. Separate communication interface modules are available for interfacing between the backplane and the EtherNet/IP, ControlNet, DeviceNet, DH+, and Universal Remote I/O links. If you plug multiple communication interface modules into the ControlLogix backplane, you can bridge and route data between the RS-232, ControlNet, EtherNet/IP, Data Highway Plus, and DeviceNet networks.
 

A ControlLogix processor communicates across the ControlLogix backplane with communication interface modules that provide interfaces for monitoring/controlling I/O across EtherNet/IP, ControlNet, DeviceNet, or Universal Remote I/O links. At other nodes on the EtherNet/IP or ControlNet link, the same communication interface modules provide interfaces to the EtherNet/IP or ControlNet link for 1756 I/O located remotely from the ControlLogix processor. General communication messages can be sent from or received by ControlLogix processors across EtherNet/IP, DeviceNet, or ControlNet networks, as well as RS-232-C or Data Highway Plus networks.

System Components

A ControlLogix/1756 control system at minimum consists of a processor module and communication gateways in a single ControlLogix chassis with a power supply.

You can plug multiple communication modules into the backplane to improve performance by providing multiple paths for data transfer. Any processor, communication, or I/O module can be placed into any module slot in the chassis. You plug a ControlLogix power supply into the left end of each chassis.

Depending on the communication ports available on your particular ControlLogix/1756 control system, you can select operator interfaces that are compatible with those particular ports.

System Redundancy

The ControlLogix environment offers different levels of redundancy. You can configure a redundant ControlLogix system by populating two ControlLogix chassis identically with one Logix556x processor, ControlNet Bridge modules (1756-CNB or 1756-CNBR), EtherNet module (1756-ENBT), and one System Redundancy module (1757-SRM). Connect the System Redundancy modules with a fiber-optic cable [catalog number 1757-SRC1, -SRC3, -SRC10, -SRC50, and SRC100 (1, 3, 10, 50, or 100 meters, respectively)]. All I/O must be remote from the redundant controller chassis. Add I/O, operator interfaces, and other devices to the ControlNet network. An operator interface computer, including I/O can also be connected to EtherNet. Redundant power supplies are available for I/O chassis & Processor Chassis. To connect to networks other than ControlNet and EtherNet, bridge through another ControlLogix chassis.

No user programming is required to implement redundancy in ControlLogix systems. Configuring a system for redundancy is as easy as selecting "Redundancy Enabled" from the Controller Properties dialog. You only have to download your program to the primary controller, as the system automatically cross-loads the primary controller's program to the secondary controller.

In a redundant ControlLogix system, the secondary controller is synchronized with the primary controller to provide a bumpless switchover for any outputs controlled by logic in the highest priority task. Switchover occurs within approximately 100ms and is transparent to any devices networked to the redundant controller 

Summary:

The ControlLogix system offers a superior approach to multiple types of control. You can perform sequential, process, drive or motion control - in any combination - with this single system. Engineering productivity is increased through such tools as advanced diagnostics and symbolic programming. And your investment in ControlLogix is assured through with such features as flash-upgradable firmware.

Communications provides the core for this powerful, contemporary control system. System bottlenecks are eliminated because the ControlLogix passive data bus takes advantage of producer/consumer network technology to provide a high performance, deterministic and distributed solution. Within a chassis, this flexible architecture permits multiple processors, networks, and I/O to be mixed without restrictions and as your system grows, ControlNet provides the link to distributing control to additional chassis. The ControlLogix approach meets the demand for increased communications to assure that data will flow where needed in your system. ControlLogix communication modules support open networks such as Ethernet, ControlNet and DeviceNet networks.

As a high-performance, passive multi-master bus, the ControlLogix backplane serves as a conduit for passing packets of information among any or all of the modules in the chassis. This allows for:

·         bridging of networks without the need for a controller

·         placing any combination, arrangement, or quantity of controllers, I/O modules, or communication modules in the chassis

·         removal and insertion under power (RIUP) of any module without disrupting the other modules in the system

ControlLogix Processors Specifications

Typical Execution Time	0.08 millisecs for 1 K Boolean
Loop Handling Capacity	Typically 400 PID loops at a rate of 250ms.
Shock, Operating	30 g peak acceleration for 11 ms duration
Shock, Non-Operating	50 g peak acceleration for 11 ms duration
Vibration	10…500 Hz 2.0 g maximum peak acceleration
Operating Temperature	0…60 °C (32…140 °F)
Storage Temperature	-40…85 °C (-40…185 °F)
Relative Humidity	5…95% (without condensation)