Inverter is usually used to set the parameters of the panel, because the panel is not sensitive to small buttons caused by inconvenient input, whether directly with the touch screen and inverter communication to achieve parameter setting function? Here we use the Wei-Tong MT8071ip touch screen and Inventronics GD10 series inverter communication as an example to introduce the use of this feature. Since Inventronics only supports Modbus RTU communication protocol, it can only use this protocol to communicate. The steps for creating a touch screen program are as follows: 1. Select the touch screen model MT8071ip, as shown in Figure 1-1. Picture 1-1 2. Add a communication connection point, PLC or meter, here the drive. Figure 1-2 dialog box pops up in the above figure, click "Add" to pop up Figure 1-3, "PLC Type" select MODBUS RTU (Adjustable), COM port parameters can be consistent with the inverter. Figure 1-2 Figure 1-3 3. Create start and stop and frequency settings. Check the Inventronics manual to find out that the communication address is shown in Figure 1-4. The control start/stop command address is 2000H. When 1 is written, the address is forward, 2 is the reverse, and 5 is the stop. The control frequency address is 2001H and the unit is 0.01HZ, ie, 100 represents 1HZ. Create a start/stop button using the "Multi-state setting element" to pop up the window in Figure 1-5. Select the PLC name MODBUS RTU (Adjustable), the address selection 6X (write a single register) will convert 2000H to decimal 8192 can be. The property is set to a write constant of 1, the same method creates a stop, and the property writes a constant of 5. As shown in Figure 1-6. Figure 1-5 Figure 1-6 Create a frequency input using "Numerical Components", as shown in Figure 1-7. The format is shown in Figure 1-8. Figure 1-7 Create a good picture as shown in Figure 1-9: Figure 1-9 4. Set the inverter parameters. P00.01=2 Run command channel is set to communication run command channel. P00.06=8 frequency source is set to MODBUS communication setting. P14.00=1 Local communication address is set to 1. P14.01=3 communication baud rate is set to 9600 P14.02=1 data bit check format is even check (E,8,1) for RTU After setting, connect the PLC communication port 3 to the inverter RS485+ and 8 to the inverter RS485-. After you connect, you can conduct communication tests.
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