【Action Description】 The figure shows a traffic light controltiming diagram,the traffic light program begins to act after the startsignal is conducted, and the action requirements are as follows: 1) North-south red lights and east-west green lights are lit at the same time, 25s later. 2) The green light of the east-west direction begins to flash…
Action Description As shown in Figure 2-5-1, a sewage tank, which is equipped with two sewage pumps to achieve the discharge and treatment of its sewage, specificallycontrol requirements are as follows: 1) Long pressto startthe button for 3 seconds, the device starts, the operation indicator light Y1 (green light) is on, press the second button…
Duringthe maintenance operation of theelectrician,circuitdiagrams always play a crucial role, and it is not an exaggeration to say that thecircuitdiagram is the foundation of the electrician’s principles. As the saying goes, a good electrician may not be a great electrician, but an electrician who cannot read circuit diagrams is definitely not a qualified electrician! Circuit…
Reactive powerPowerCompensation cabinet, is three-phase four-wireLow voltageDistributionNetwork to improve the power factor, reduce distributionNetwork line, improveElectricalEquipment utilization is an indispensable important supporting facility. The main low-voltage electrical appliances in the reactive power compensation cabinet are as follows:Electrical appliancesThere are several kinds: 1、Distribution cabinet——Assemble various low-voltage electrical appliance components. 2、Instrument——Detect and monitor the operation status of…
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Analog isolator is an electronic component used to isolate analog signals between two circuits to prevent interference between circuits. It usually consists of two analog signal converters, which can convert analog signals into digital signals and then convert them back into analog signals to achieve isolation. Signal isolator is a kind of linear optocoupler isolation…
In agricultural production, greenhouses have played a huge role in promoting the development of agriculture. In the fields of high-value, off-season vegetables, high-value fruits, etc., greenhouses are increasingly indispensable. It has many benefits. For example, the greenhouse can be regarded as an independent ecosystem to a certain extent, which can isolate pests and diseases to…
Intelligent parking guidance system is a kind of advanced technology, through real-time data analysis and intelligent algorithms, to provide accurate parking information and guidance to car owners, helping to solve the troubles and challenges in the parking process. This article will reveal the black technology of intelligent parking guidance system , introduce its working principle,…
Each relay has a name, and generally the normally open point and normally closed point share the same name with the relay. If there are 10 relays, there will be 10 names, as long as each relay and contact is not confused with other relays. Wiring diagram of small solid state relay Small relay wiring…
PLC programming algorithm (1): switch value There are nothing more than three large quantities in PLC: switching quantity, analog quantity, and pulse quantity. Once you understand the relationship between the three, you will be able to master PLC proficiently. 1. Switching quantity is also called logical quantity, which refers to two values, 0 or 1,…