Difference between DCS & PLC Systems
DCS stands for Distributed Control System and PLC stands for Programmable Logic Controller. Do you know the Difference between DCS and PLC Systems ? Difference between DCS & PLC Systems
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PLC Connection between Instrument, Junction Box, Marshalling & System Cabinet
A PLC connection represents the signal flow starting from the field transmitters, junction box, marshalling cabinet, system cabinet and Human-Machine Interface for the operator graphic display. PLC Connection between Instrument,
PLC Digital Signals Wiring Techniques
Ina process plant, on/off control is done through the PLC or DCS. The below Figure is an overview of one discrete/digital (on/off) circuit, showing the entire process from the power supply
PLC Analog Signals Wiring Techniques
Unlike the discrete/digital (on/off) circuit, analog signals vary across a range of voltage or current. Taking the same vessel described previously in Digital wiring example, how would the wiring change
What is Distributed Control Systems (DCS) ?
A radically new concept appeared in the world of industrial control in the mid-1970’s: the notion of distributed digital control. Direct digital control during that era suffered a substantial problem:
How to Troubleshoot a PLC System
At this post i will give some basic instructions which are from my personal experience in order to give you a guide for how troubleshooting in automation systems (PLC/DCS) is
PID Controllers with Output High Select Logic
The below figure 1 shows a typical control scheme with two controllers driving the same control valve via high select logic. The controller PIC-1 is the main pressure controller and
Overview of Split Range Control
A very common control scheme is split range control in which the output of a controller is split to two or more control valves. Split Range Control For example: Controller
Blast Furnace Panel Modification to Reduce Down Time by 60 to 70%
With the time demand of increasing the efficiency of production facilities to achieve Target, it is required to made the engineering system robust and fool proof .The below described is
Switch or Transmitter
For decades, process instrumentation specifiers have faced the decision whether to use a switch or a continuous transmitter for a given application. Either type of instrument can be used to