Author name: Ashlin

post-graduate in Electronics & communication.

What is Hot standby in PLC?

What is PLC? A PLC is a digitally operated device that would utilize programmable memory to store the instructions internally, by executing certain functions such as timing, counting, arithmetic, and logic sequencing. These functions are executed to control various kinds of machines or processes. So it can be used to control the equipment in an …

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Comparison between Conventional (4-20ma) connection, Foundation-Fieldbus, and HART?

What is a foundation field bus? A field bus can be described as the connection between industrial devices. The major purpose of a field bus is to replace the point-to-point link between the field devices and control system, instead of that Fieldbus would provide a digital link. In a field bus, the transfer of information …

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Comparison between Star and delta connections and How Star-Delta starter works?

What is the Function of motor starters? 1. Start and stop the motor 2. Limit inrush current where necessary 3. Permit automatic control when required 4. Protect motor and other connected equipment from sustained overload, no voltage, under voltage, single phasing, etc. What is meant by a star? In each 3-phase alternator, six terminals come …

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MODBUS SERIAL VS MODBUS TCP/IP

What is a MODBUS? MODBUS is a communication protocol that is used for many industrial applications. This communication protocol can be used to do the data transfer between the process control equipment and the HMI. MODBUS was developed by MODICON to communicate with industrial electronic devices such as PLC, PAC, or DCS over a twisted …

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What is valve packing?

What is valve packing and the importance of valve packing? We can describe the packing as a sealing system that normally consists of deformable materials such as graphite, asbestos, etc. Mostly the packing material will be in the form of solid or split rings which would be contained in a packing box. The packing material …

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