LED lights PLC ladder programming and wiring

First, the equipment, tools, materials required See Table 1. Second, the training content: 1, project description An artistic lantern modeling board is shown in Figure 6, and A, B, C, D, E, F, G, H are eight lanterns, which are annular distribution. The control requirements are as follows (the order in which the lamp is lowered): The startup switch K1 is closed, and the eight bulbs are simultaneously bright, that is, Abcdefgh is only lit at the same time; then eight bulbs are on the direction of the counterclock in the direction of 1 second, that is, a bright 1 second → B bright 1 second → c bright 1 second → D bright 1 second → E bright 1 second → f bright 1 second → g bright 1 second → H bright 1 second; then eight bulbs are only lit at the same time, that is, Abcdefgh is on simultaneous 1 second; then eight light bulbs over clockworthiness clock The direction of the direction is lit for 1 second, that is, H bright 1 second → g bright 1 second → f bright 1 second → E bright 1 second → D bright 1 second → c bright 1 second → B bright 1 second → a bright 1 second. Then press this sequence. Press the stop switch K1, all the lights are off. 2, training requirements 2.1 Input and output point assignment See Table 2. 2.2PLC wiring diagram Pick up line according to Figure 7. Note that COM1, COM2 is connected because indicators of the same rated voltage. Enter the start switch and stop switch. 2.3 Programming In Fig. 8, when the PLC is operated, the programs 9 to 19 are turned on, and the M11 is turned on. Since the program steps 50 to 120, the M11 knead contact is closed, respectively controlled the 18th of Y0 ~ Y7, so that the color of the light ABCDEFG is simultaneously Bright, because T0 is delayed for 1 second, so ABCDEFGH simultaneously lits for 1 second. In 1 second, the program is 40, the T0 is engaged, the shift command is executed, that is, the ABCDEFGH turns is lit, because 1 second T0 is closed once, so the time interval of the ABCDefgh turns For 1 second. In the procedure steps 20 to 29, when M20 is passed, M101 is set, and the M101 is moved from the Mi2 to M19, and the H ~ A, that is, H, G, F, E, respectively, respectively. D, C, B, and A are turned over every 1 second. In the program steps 30 to 39, when M20 is passed, the M101 is reset, the M101 dynamic contact with the MI2 to M19 is engaged, and the a ~ h is lit in series, namely A, B, C, D, E, F, g, h on every 1 second. The switch K2 is stopped at any time, step 114, the interval reset instruction makes the M12 ~ M19 all reset, all the lights are not bright. 2.4 Run and debug the program (1) Enter the ladder program into the computer and check the power supply correctly. (2) Commissioning and operation of the program. A. After connecting the PLC power, set the PLC to the RUN state, close the K1, observe the brightness of A, B, C, D, E, F, G, and H. B. Closing K2, observe the brightness of A, B, C, D, E, F, G, and H. (3) Commissioning operation record. Read more