Table of Contents
Why is PLC so expensive?
The higher cost of PLCs is offset by the testing (often in nasty environments) they are (or should be) submitted to.
What is the importance of programmable logic controller?
When correctly installed, PLCs allows you to accurately monitor things such as your alarm, HVAC, and navigation systems. This prevents system malfunctions and makes for a smooth charter. PLCs can perform a variety of tasks more complex than those of PC systems.
What are the main advantages of using PLCs in industrial automation?
Applications and Advantages of PLC (Programmable Logic Controllers):
- Very fast.
- Easy to change logic i.e. flexibility.
- Reliable due to absence of moving parts.
- Low power consumption.
- Easy maintenance due to modular assembly.
- Facilities in fault finding and diagnostic.
- Capable of handling of very complicated logic operations.
What are the advantages of using PLCs versus using hardwired relays?
PLCs are much more reliable and are way easier to troubleshoot. The mechanical functions of relays simply wear out over time. Plus, the wiring required to operate a relay system is much more complicated than a PLC system. This can also cause higher costs to install and upgrade due to extra labor costs.
How are PLCs used in industry?
PLCs are used in various applications in industries such as the steel industry, automobile industry, chemical industry and the energy sector. In the Travel Industry, PLC has been used to monitor the safety control system and to operate lifts and escalators.
Why are PLCs more expensive than PCs?
In comparison, PLCs may be initially cheap but as processing power increases, their cost follows an exponential trend. PCs have a higher cost than PLCs when no external peripherals need to be added as PLCs usually support standard industrial equipment.
How much has the cost of computing increased over time?
Since the 1940s, MIPS/$ have grown by a factor of ten roughly every five years, and FLOPS/$ roughly every 7.7 years. Nordhaus (2001) analyzes the cost of computing over the past century and a half, and produces Figure 1 (though the scale on the vertical axis appears to be off by many orders of magnitude).
Why choose a plc for industrial automation?
Known for its rugged design and scalable implementation, the PLC was adapted by all major manufacturers and to this day is the norm for industrial automation.
What are the industrial requirements for PLCs and PCs?
The industrial requirements of today are no longer similar to the requirements 20 years ago. Both PLCs and PCs are required to control a host of devices for communication, monitoring and control, and should therefore have sufficient expansion capabilities.