Comparison Instructions in PLC Programming
Comparison instructions in PLC are used to test pairs of values to condition the logical continuity of a rung. Thus, comparison instructions would seldom, if ever, be the last instruction…
Types of Instructions in PLC Programming
What is a Ladder Diagram? A Ladder Diagram is one of the simplest methods used to program a PLC. It is a graphical programming language that evolved from electrical relay…
How to use JUMP Instruction in PLC Ladder Logic?
Jump instruction in ladder logic is used to skip some process or rungs according to the requirement. It is paired with Label which is used to limit the skipping the…
Wrong Installation of Horn Type Radar Level Transmitter on Sloping Tank
In this article, we discussed the incorrect installation of Horn type RADAR level transmitters on slopping tank for oil and gas, refinery industries. We measure the standout of the nozzle…
Biomedical Instrumentation Questions and Answers
Read our Top Biomedical Instrumentation Questions and Answers for your interview preparation and practice exam questions. Biomedical Instrumentation Absolute Refractory Period (ARP) During the initial portion of the action potential,…
How to Use Encode and Decode Instructions in PLC ?
In this article, we discussed Encode (ENC) and Decode (DCD) Instructions application in PLC ladder logic with example programs. In telecommunication, multiple analog and digital signals are combined into one…
Analog Measurement using Ladder Logic
This article explains the analog measurement in control system using ladder logic. If measured value of revolution is 400 RPM/min, Calculate the equivalent voltage. Here we need to measure both…
What is PID Controller?
PID Controllers are widely used in industries nowadays. Although there are inbuilt PID controller functions in the PLC, this functions are used in many applications. Approximately 95% of the closed-loop…
Scale and Normalize Instructions in PLC
Scale Instruction SCALE_X scales the normalized real parameter VALUE where ( 0.0 <= VALUE <= 1.0 ) in the data type and value range specified by the MIN and MAX…
How to use Master Control Reset (MCR) Instruction in PLC
A Master Control Reset (MCR) instruction is an output instruction. MCR instructions are always used in pair. The paired instructions cause the PLC to enable or inhibit a zone of…
