PLC programming is an electronic system for digital computing operations designed for applications in industrial environments. It uses a programmable memory to store instructions for performing operations such as logic operations, sequence control, timing, counting, and arithmetic operations, and to control various types of machinery through digital and analog inputs and outputs. Or the production process. Programmable controllers and their associated equipment should be designed in such a way that it is easy to make the industrial control system a whole and easy to expand its functions. The PLC program code is as follows: Processing set input values LD SM0.0 ITD AIW2, AC1 DTR AC1, AC1 /R 32000.0, AC1 MOVR AC1, VD136 MOVR VD136, VD138 /R 1.0, VD13 Set timing time LDN M0.2 TON T50, 100 LDW"= T50, +99 = M0.1 LD T50 = M0.3 Running interrupt program LD SM0.1 O M0.3 CALL SBR_0: SBR0 LD SM0.1 system initialization. R M0.0, 2 R Q0.0, 8 Press the start button and M0.0 is the start flag. LD I0.0 AN I0.1 EU S M0.0, 1 R M0.1, 1 After pressing the stop button, turn off the inverter and 4 pumps, M0.1 is the stop sign. LD I0.1 EU S M0.1, 1 LD M0.1 R M0.0,1 R Q0.0,8 The No. 1 pump motor is operated in frequency conversion. LD M0.0 EU S Q0.0,1 S QO.7,1 The inverter has the upper frequency limit. The start timer T37 starts to count. After 15 seconds, the No. 1 pump motor and the inverter are turned off. At the same time, the timer T33 is started for 2 seconds to decelerate the inverter to 0. LD I0.2 A Q0.0 TON T37, +150 LD T37 EU TON T33, +200 R Q0.0,1 R Q0.7,1 2 seconds to the time, the No. 1 pump motor is switched to the power frequency, and the No. 2 pump motor is frequency-controlled. LD T33 S Q0.1, 2 S QO.7,1 The frequency limit of the inverter appears. Start the timer T38 for l5 seconds. After the timer is finished, turn off the No. 2 pump motor and inverter, and start the timer T34 for 2 seconds to decelerate the inverter to 0. LD I0.2 A 0.1 TON T38, +150 LD T38 EU TON T34, +200 R Q0.2,1 R Q0.7,1 2 seconds to the time, the 2nd pump motor is switched to the power frequency, and the 3rd pump motor is frequency-controlled. LD T34 EU S Q0.3, 2 S Q0.7, The frequency converter has a lower frequency limit, and the timer T39 is started for 3 minutes. After the timer is finished, the No. 1 pump motor is turned off. LD 10.3 A Q0.1 TON T39, +1800 LD T39 EU R Q0.1,1 The inverter reaches the lower frequency limit and starts the timer T40 for 3 minutes. After the timer is finished, the No. 2 pump motor is turned off. LD I0.3 A Q0.3 TON T40, +1800 The inverter reaches the lower frequency limit again, and the timer T41 is started for 3 minutes. When the timing is completed, the No. 3 pump motor and the inverter are turned off. LD I0.3 EU R Q0.3,1 LD I0.3 A Q0.4 TON T41, +1800 LD T41 EU
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Plc programming source code sharing
What is PLC programming?