Examples of Comparison Commands in PLC Ladder Logic I mentioned previously that comparisons are used all over the place. Let’s now get specific and talk about what places these are. A simple comparison is if you need to know if two values are equal. If the equipment has four different pos...
PLCnetworkingglossary TounderstandthePLC'scommunicationsversatility,let'sfirstdefinethetermsusedindescribingthevarious systems. ASCII.Thisstandsfor"AmericanStandardCodeforInformationInterchange."AsshowninFig.1,whenthe letter"A"istransmitted,forinstance,it'sautomaticallycodedas"65"bythesendingequipment.Thereceiving...
Installs a man-machine contact surface on the programmable controller (PLC) control cabinet door, demonstrated the technical process way, the equipment condition, the combustion furnace, the heat interchanger parameter, the drying room temperature curve, the breakdown report to the police and so on...
Electrical control panel designs can vary based on the application. Control panels generally have either PLC’s or industrial computers that can have features like Supervisory control and data acquisition (SCADA). SCADA is a monitoring system on top of a control system. Usually one SCADA system is...
In an industrial process, set points and control variables can be easily and centrally maintained and controlled as part of the material master data. Even customer order-specific information can be directly exchanged with the PLC instead of replicating the data across different software layers. Furthe...
A PLC, or programmable language controller, is a compact industrial computer designed to control system processes from one location. You may have heard about PLCs but haven’t fully grasped the concept. PLCs are like the brains ofindustrial automationequipment. Instead of having several machines ...
Overvoltage category According to IEC 61800-5-1 standard, equipment is classified into four categories based on how it is connected to the supply mains: • Category I: Applies to equipment connected to a circuit where measures are taken to reduce surges and transient overvoltage. • Category...
cnc machines can produce identical parts with consistent quality. how does cnc programming control cnc machines? before the advent of computers, machinists used cards or tapes to control machine movements. they punched holes in these cards in a specific order to create the codes. while this was...
Common applications include conveyors, log cranes, mobile equipment, centrifuges, chemi-washers and planers. Hydrostatic drives are some of the least understood systems because many of the components are located on or inside the hydrostatic pump assembly. ...
One main concern about investor sentiment is how to measure it. Different methods have been used thus far: market proxies such as the closed-end fund discount; NYSE share turnover; the number of and average first-day returns on IPOs; the equity share in new issues, and the dividend (...