Connect the Senlan inverter to the Profinet network via Modbus to Profinet

This case is a configuration case of using the MODBUS to PROFINET gateway of Bestun Technology to connect the Senlan inverter and PLC. The devices used are Siemens S7-1200PLC, MODBUS RTU to PROFINET gateway, and Senlan inverter.

1. First create a new project file;

2. Import the GSD file. Copy the GSD file of the MODBUS to PROFINET gateway to any location. Open Portal and create a new project. Enter Devices and Networks, select Manage General Station Description Files in the Options, and install the GSD file;

3. Search for the folder where the GSD file is stored. After finding the GSD, select Install and wait for the installation to succeed.

4. After successfully installing GSD, open the hardware directory and add the installed GSD file to the configuration. The MODBUS to PROFINET gateway and PLC have not yet been connected and are in an unassigned state;

5. Click Unassigned to connect to the PLC and then set the parameters of the MODBUS to PROFINET gateway properties;

6. Modify the properties of the MODBUS to PROFINET gateway, modify the IP address and PROFINET device name of the MODBUS to PROFINET gateway (do not include symbols such as *./ in the device name);

7. Add the required input (inptu) and output (output) bytes. Add the bytes as required;

8. After setting the parameters, you can download and load it to the PLC as shown in the figure below;

9. Open the configuration software Gateway Configuration Studio;

10. Click New and select the device as PN2MRM3;

11. The IP address in the configuration software must be consistent with the IP address in the Botu MODBUS to PROFINET gateway configuration;

12. The PROFINET configuration in the configuration software must be consistent with the PROFINET gateway configuration of Botu MODBUS;

13. Configure the baud rate, word width (data bit selection), parity check and other parameters according to the device instructions. From the figure, we can see that the inverter slave protocol is Modbus-Rtu communication data format with 8 data bits and one stop bit without check. Similarly, the gateway is configured in the same way;

14. Take the device description in the figure below as an example. In the device description, address 1, function code 3/10, the address to be written is 3200H, 3201H. The configuration of writing the main control word is as follows;

15. After configuring all the required parameters, download, click Tools and then click Communication Settings;

16, the hexadecimal address is converted to the decimal starting address. Write 12800 register quantity. Two representatives can input the main control word start and stop and the given frequency. Read using the 03 function code. If you want to read the value from the main status word to the FF-17 process word to select the output, then you need to fill in 10 register data starting from 12816. Click Search to enter the next interface and then click Search and double-click the IP and device in the red box below.