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PLC / VFD systems

At Buchmann Electric, we work with both PLC and VFD systems. Programmable Logic Controllers (PLC) and Variable Frequency Drives (VFD) are 2 of the most important technologies that are emerging for motor control.

What Is A Programmable Logic Controller?

A PLC is a computer type that is most commonly used for motor control applications. Traditionally the motor control circuit has been hard-wired, whereas PLC control is a kind of program-based software.

What Is A Variable Frequency Drive?

Often referred to as an inverter, VFD systems most commonly consist of a controller, an AC motor, as well as an operator interface, which are used together to control a machines acceleration, deceleration, speed, torque, as well as direction of rotation. The frequency is linked directly to the RPMs of the motor, which means that with a higher frequency, is a higher number of RPMs. Unlike other systems which have constant speeds, VFD allows for an infinite number of different possible speeds that are within its range of operation. By con trolling the motor speeds to suit load requirements, both the efficiency and the performance of the motor installation is increased.

The PLC / VFD Systems Of Today

Both PLC and VFD have gained benefits thanks to technological advances in memory capacity and processor technology. This has led to smaller components and easier programming of PLCs, as well as allowing for the processing of more complex logic and mathematical applications. VFDs have also benefited from these advances, meaning they are now able to perform increasingly difficult tasks, while also gaining an improved motor control, and a simplified user interface.

Reduced Consumption & Cost Of Energy

Reduce costs and consumption of by using the VFD to control the motor as required. There is rarely a need for any applications to run at full speed, which means you can match the speed of the motor-driven equipment with the load requirements.

Statistically responsible for over 65% of all of today’s power consumption, there are now a growing number of electric motor systems which can optimize control. Because they have access to this control, VFDs have the ability reduce energy consumption in a facility by as much as 70%. So, by improve product quality reducing production costs, of VFDs while also and combining utility rebates, energy efficiency tax incentives, translates to return on investment for VFD installations as little as 6 months.

Efficient Motor Control

The motors should always be operating at the most efficient and suitable speed for your application so that errors are reduced, which boosts revenues and increases production levels. Smoother action VFDs for example, enable conveyors and belts to eliminate any jerks when starting-up, which allows for higher throughput.

Extend Life & Reduce Maintenance

Optimal motor control ensures that not only will equipment last for as long as possible, but it also can significantly reduce downtime that is caused by maintenance. VFD optimizes frequency and voltage control for the motor, while also providing improved protection from issues such as phase protection, electro thermal overloads, and under or overvoltage.

When a load is starting with VFD protects the driven load and the motor from any instant shock while starting anywhere across the line. This is important because smooth starts eliminate a great deal of general wear and tear for the gear, belt, and bearing, while smooth cycles of acceleration and deceleration provide the additional benefit of water hammer reduction and maybe even elimination.

The Future Of PLC / VFD Systems

While PLCs aren’t ready just yet to be replaced by VFDs at complex pumping applications, VFDs can still be used in the simplest pumping applications, as well as pump multiplexing or some of the more difficult applications. Even during use, the properly programmed pumping that has been added means that VFD can reduce the cost of both hardware and programming.

VFDs have enhanced setup control, reduced cost of procurement, and an overall standardization, with both technical support and staff training available. Because manufacturers of VFDs are consistently working on improving their features, the future will most likely belong to more VFDs with embedded firmware specifically for pumps.

Buchmann Conveyor Systems

Whether you need a brand-new PLC or VFD, or your existing motors or systems require servicing, Buchmann Electric are experts in this field and waiting to discuss your requirements. Our technicians work with you to ensure everything is supplied to your specifications.

Buchmann Electric will carry out all work, and after everything has been double checked to ensure it all runs efficiently and safely, the job will be completed both on time and on budget.