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Program logic control

Industrial digital computer that controls manufacturing processes.

Reliability, Ease of Programming, and Process Fault Diagnosis.

A programmable logic controller (PLC) is an industrial solid-state computer that monitors inputs and outputs, and makes logic-based decisions for automated processes or machines. PennAir’s Automation engineers integrate PLC systems with other devices (HMIs, SCADA) to ensure a seamless automation process.

Advantages of PLCs:

  • Flexible with a Long Life: PLCs are robust and can survive harsh conditions including severe heat, cold, dust, and extreme moisture. Additionally, they are modular and easily programmed with an attractive ROI. 
  •  Reduced Space: PLCs are completely solid state devices and extremely compact.
  • Energy Saving: Average power consumption is 1/10th that of an equivalent relay based control.
  • Shorter Project Time: A hard wired control system can only be constructed when the task is fully defined, causing extended project timelines. However, with PLCs, the construction of the controller and wiring are independent, expediting the process. 


Open and closed-loop logic control, as well as monitoring of manufacturing and production steps, are fundamental aspects of automation technology. They’re used to organize production processes reliably, safely, quickly, and cost-effectively. Control technology is used as a basic function in a variety of applications and industry sectors – at the same time, it plays a significant role in Industry 4.0/Industrial Internet of Things.

Receiving signals and sending commands – that’s the concept and the principle of logic control for production steps. Ever since the industrial revolution, people have been pursuing the goal of monitoring manufacturing and production steps and organizing them safely and efficiently.

From manual control to mechanical, electrical, and programmable logic controllers, control technology is the starting point of automation technology and the companion to Industry 4.0/Industrial Internet of Things.

Whether it’s the automotive, pharmaceutical, or food industry – control and PLC technology constitutes the central intelligence of all production systems and is therefore used in a wide range of industry sectors.


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