PLCs, DCSs & Controllers

Dual PID controller for SLC 500

April 2003 PLCs, DCSs & Controllers

Using multiple PID loops with an Allen-Bradley SLC 500, is made easier with Red Lion Controls' DLCD. The device is a DIN-rail mounted module that implements two independent PID loops, communicating with a SLC 500 over the DH-485 network to allow a PLC program to control and monitor each loop's operation. By lifting the burden of PID control from the controller, the need for expensive I/O cards is avoided, and valuable PLC memory and processing power are made available for other tasks. The DLCD not only provides a more elegant and effective control solution, it also offers considerable hardware cost savings for each loop concerned.

The DLCD is designed to be a true plug-and-play solution. It controls all the communication between itself and the SLC 500, avoiding the need for any ladder programming. All of the device's features can be configured using Red Lion Controls' Windows-based configuration package. Alternatively, by setting a few bits inside the PLC, the DLCD can be configured to read all of its parameters from the controller's data tables. This allows hot-swapping of devices without the need for any configuration operations beyond the setting of a few DIP switches - ideal for OEMs wanting to simplify maintenance procedures in order to reduce the cost of ownership of their machines.

The PID control algorithm used in the DLCD has been tried and tested in the field, having been used in Red Lion's temperature controllers for many years. It provides advanced auto-tune facilities, multiple alarms, heat-cool operation, plus input and output filtering. The control accuracy of the DLCD makes the product suitable for extruders, injection and blow moulders, ovens and furnaces, or food processing applications. In fact, any application where a SLC 500 is being used in conjunction with temperature control will benefit from the DLCD's improved performance and reduced cost.


Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

Controller for robotic systems
June 2021, Omron Electronics , PLCs, DCSs & Controllers
Omron has announced the launch of its first ‘Robotic Integrated Controller’, based on its leading NJ series of machine controllers for industrial automation.

Wireless controller for smarter factories
March 2021, Turck Banner , PLCs, DCSs & Controllers
Turck Banner’s DXM wireless controllers are designed to facilitate Ethernet connectivity as well as enabling IIoT applications.

Automation with PC-based control at UOW Malaysia KDU University
March 2021, Beckhoff Automation , PLCs, DCSs & Controllers
Eight embedded PCs and 3000 EtherCAT I/Os ensure maximum building efficiency across university campus.

Open PLCnext Technology ecosystem
February 2021, Phoenix Contact , PLCs, DCSs & Controllers
With the new PLCnext Control AXC F 3152 controller, Phoenix Contact now provides a high-performance Axioline controller based on the open PLCnext Technology ecosystem.

Controllers with real-time Ethernet solution
April 2021, Mecosa , PLCs, DCSs & Controllers
Bronkhorst is pleased to present Powerlink as its tenth on-board fieldbus interface option.

Industrial edge controller for pipeline operations
February 2021, Emerson Automation Solutions , PLCs, DCSs & Controllers
Denka Wangdi, of Emerson’s machine automation solutions business, explains how the gathering, storage and analysis of detailed operational and diagnostic data by modern edge controllers provides significant benefits for pipeline operators.

Becker Mining’s upgraded chairlift PLC panels increase safety
November 2020, Becker Mining South Africa , PLCs, DCSs & Controllers
Becker Mining South Africa recently launched a new upgraded chairlift PLC panel that enhances the reliability of Becker chairlift systems, which are used to transport personnel on mines throughout the world.

Open PLCnext Technology ecosystem
January 2021, Phoenix Contact , PLCs, DCSs & Controllers
With the new PLCnext Control AXC F 3152 controller, Phoenix Contact now provides a high-performance Axioline controller based on the open PLCnext Technology ecosystem.

New Modicon IIoT-ready controller
September 2020, Schneider Electric South Africa , PLCs, DCSs & Controllers
The Modicon M262 is IIoT-ready, designed and delivered with intuitive direct cloud connectivity and no gateways are required for OEMs to design solutions for performance demanding applications.

Modular mid-range PLC series
June 2020, ElectroMechanica , PLCs, DCSs & Controllers
The Delta compact modular mid-range AS series PLCs, available locally from ElectroMechanica (EM), is a high-performance, multi-purpose controller designed for all kinds of automated equipment. The series ...