Flexible controller aids in-plant standardisation

April 2002 System Integration & Control Systems Design

While small in size, its makers say that the Gefran 600 still performs up to scratch with the latest controller technology. The 600 can easily control any thermal process thanks to its robust control algorithms and its 0,2% accuracy.

It has an operator interface protected by a Lexan membrane that ensures an IP65 protection level, a double LED display with four digits, a 4-key keypad with one key configuration for manual/automatic, hold, alarm reset and changing between dual set points. Everything is designed to simplify use. All system information from process variables, set points, state of in and outs and error messages are displayed. The instrument requires few software parameters, which means that the controller can be used immediately after setting the set points and any alarm limits. The automatic tuning function is simple and can be launched from the front keypad.

For people requiring simplified programming, Gefran offers a PC configuration kit for Windows, which configures the instrument in seconds, saves programmes, prints data, displays trends and prints historical data, in addition to recovering factory setting functions. Constant diagnosis of the control loop prevents breakdowns and the 600 will notify the user in the event of a problem. The user can decide the state of alarm outputs or a power level to supply in case of a breakdown. A protection code permits authorised users to block access to the configuration parameters once instrument set-up is performed to prevent operator error or the unauthorised changing of parameters.

The double set point, timer and set gradient functions are suitable for a wide range of applications. About 60 different input types are pre-programmed, including thermocouples, thermoresistors, PTC, 0-60 V, 0-1 V, 0-5 V, 0-10 V and 4-20 mA. For special nonlinear sensors customised values can now be entered in 32 segments. The type of input is selected from the faceplate keys, so no external shunts are required. An auxiliary CT 50 mA is available for load control. Up to four outputs can be chosen, including relays, logic, triac, 4-20 mA analog or 0-10 V, all freely configurable. Another isolated output is available to power external transmitters. The optional digital input allows switching between two set points, alarm reset and manual or automatic switching. The serial dialogue option, available in standard RS485, allows connection to supervision systems, PLCs, or simple terminals by means of two available protocols: Cencal and Modbus RTU.

Summary of noteworthy features:

* Lower in cost than previous models.

* Enhanced control capability for complicated and difficult processes.

* Dual set point for standby operation.

* Logical and easy set-up procedure.

* Three alarms with a completely configurable function.

* Multiple failsafe features.

* Hot/cold function with a selection of cooling fluid.

Neil Coetzer, UniTemp:

011 392 5989

Dieter Butow

021 762 8995

Further reading:

Understanding the role of AI in generative engineering design
System Integration & Control Systems Design
When a design engineer sets out to design a new part, component, or assembly, the intent is to meet the design requirements for fit, form and function, and also incorporate a certain degree of innovation and elegance to the overall design. There is no reason to re-invent the wheel by introducing a new design.

Read more...

---

PCS stays up so you don’t have to
PCS Global System Integration & Control Systems Design
Maybe it’s time to look at a solution that stays online 99,99999% of the time so you don’t have to. This the world of Stratus computer platforms, tailor-made for your critical applications.

Read more...

---

Four ways the global parts shortage has led to innovation and openness
System Integration & Control Systems Design
For those who use automation parts, the unpredictable nature of the supply chain is one of the biggest problems faced today. The shortfall has impacted every industry, but automation components have been especially affected.

Read more...

---

Iritron’s year of consolidation
Iritron Editor's Choice System Integration & Control Systems Design
Despite the multiple challenges faced by businesses in South Africa, the buoyancy of the technology sector worldwide has produced some green shoots for automation specialist, Iritron.

Read more...

---

Five edge opportunities for SIs to maximise revenue in 2024
Editor's Choice System Integration & Control Systems Design
System integrators continue to face the challenge of doing more with less – supporting complex operations, while meeting production schedules with limited resources, and innovating to increase efficiency, maximise safety and reduce risk.

Read more...

---

Condition monitoring in a forging press retrofit
Beckhoff Automation System Integration & Control Systems Design
Significantly increased vibration on machines can result in many forms of negative impacts such as reduced system performance or damage to the machine and foundation. Using the example of retrofitting a forging press with a maximum press force of 2000 tons, Wölfel Engineering explains how efficiently the process was tailored and implemented with PC-based control and measurement technology from Beckhoff.

Read more...

---

System integration in the digital age
System Integration & Control Systems Design
To meet the challenges of an increasingly competitive marketplace, many manufacturers (end users) must focus on their core competencies and outsource the rest to experts.

Read more...

---

Choosing a system integrator
Editor's Choice System Integration & Control Systems Design
Automation is an essential part of manufacturing today. Whatever the size, an upgrade or migration project can be complex, and the risks can be high. This is where system integrators (SIs) can help. They can bring together complex subsystems or components of a larger system and make them operate as a whole.

Read more...

---

Iritron awarded international contract for furnace control
Iritron System Integration & Control Systems Design
Iritron has been awarded two international, multimillion-Rand furnace drying projects. The company has extensive expertise in furnace drying control systems, and provides solutions in the fields of electrical, instrumentation, control systems, and decision support systems.

Read more...

---

Capitalise on risks by turning them into opportunities for growth
Iritron System Integration & Control Systems Design
In spite of the challenges facing the global and local economy, systems integration expert, Iritron remains optimistic for the year ahead, and believes that there are significant opportunities to be found during a challenging economic climate.

Read more...

---