(1) the analysis of the existing system worksUnderstand the process of the controlled device and mechanical functioning, according to relay diagram analysis and principle of master control system. (2) PLC I/O distributionDetermine the system's input and output devices, the PLC I/O allocation, draw the PLC wiring diagram. (3) correspond to the establishment of other componentsOK relay diagram … Continue reading PLC program Transplantation Design Method Programming steps
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PLC program Transplantation design
Replace the relay control is the trend of PLC control, if the relay control system with PLC transformation, under the original relay diagram to design of ladder diagram is clearly a shortcut. This is due to original of following electrical control system after long-term of using and test, has was proved can completed system requirements … Continue reading PLC program Transplantation design
Failure analysis of job insecurity diesel generator starting
After the diesel generator starting job insecurity Failure Analysis:After cranking speed diesel generator fluctuated, usually because the fuel adjustment system failure caused.Failure reason:1 each cylinder diesel generator work poor, leading to deflationary pressures are not the same for each cylinder.2 fuel supply system with air, water or poor oil supply.Associated with each cylinder plunger large … Continue reading Failure analysis of job insecurity diesel generator starting
How to calculate 7.5kw motor rated current
7.5KW three-phase motors (Y2 series) Rated current: 14.9 An (2-pole), 15.6 Ann (4-pole), 17.2 Ann (6-pole), 17.8 Ann (8-pole). No-load current is about 30 to 50% of the rated current.Calculation method:P = 0.85 * 1.732UI = 0.85 * 1.732 * 380 * II = 13.4 over the algorithm 7.5kw three-phase asynchronous motors. 0.85 power factor.
The most simple and safest delta voltage starting circuit diagram
circuit diagram
What is the difference between circuit and magnetic circuit
What is a circuit?EMF (voltage) under the path of the currents flowing through the circuit. Usually consists of a power supply, load and switch it into three parts. The magnitude and direction of the current flowing through the circuit the circuit does not change with time, called the DC circuit. The magnitude and direction of … Continue reading What is the difference between circuit and magnetic circuit
What is a PLC? PLC What does it mean?
Many beginners to abbreviation (PLC) to worry about. PLC is what, what is a PLC? What does PLC mean?Is actually very simple, official definitions of same, I understand. What's PLC? PLC is an intelligent controller, is a computer (PC). PLC is a programmable logic controller. PLC programmable controller is: English universal Programmable Logic Controller PLC, … Continue reading What is a PLC? PLC What does it mean?
Difference of thermocouple and thermal resistance
Thermocouple and RTD are contactless temperature measurement of temperature measurement, although its the same, it is measuring the temperature of a body, but their principles and characteristics are different.First of all, introduce the thermocouple. The temperature of thermocouple temperature measurement is the most widely used devices, whose main features are wide temperature range, stable performance, … Continue reading Difference of thermocouple and thermal resistance
Siemens S7-300 plc can extend several racks
Siemens S7-300PLC 3 racks can be extended, count of CPU unit No. 0, altogether 4 rack, 32 modules, right? I have a question, can I extend 4 rack, rack, count the No. 0/5, with 20 modules? 4 153 connection 5 rack, can you?Siemens S7-300plc 1, mainly to see what type of CPU. Different CPU's ability … Continue reading Siemens S7-300 plc can extend several racks
Difference between Simens PLC S7-200 and S7-300
Hardware differencesS7-300 in order to meet the large and middle scale control system, and design more modular. S7-200 series is integral, CPU module, the I/O module and the power supply module in a module, called CPU modules and S7-300 series, from the power supply, I/O,CPU and the rail is a separate module.Actually S7-200 series can … Continue reading Difference between Simens PLC S7-200 and S7-300
PLC ONE 