Profinet to Can protocol gateway and Siemens PLC and DC servo drive communication case

In a domestic operation project of a Shenzhen Automation Co., Ltd., the project requires the control center system to send different command messages to the DC servo drive to control the start and stop and running speed of the drive, thereby controlling the rotation speed of the four servo motors connected to the lower end of the drive. The control center system uses Siemens S7-1200 PLC, which supports the Profinet bus protocol, and the DC servo drive supports the CAN protocol.

Solution:
Since the DC servo drive supports CAN protocol communication when working normally, the control center system Siemens S7-1200 PLC supports Profinet bus protocol communication. As the Profinet master station, the two protocols are different and cannot be directly connected to achieve data exchange. A third-party protocol conversion module is required to achieve data exchange between different protocols.
The Profinet to CAN gateway independently developed and produced by Beijing Bestun Technology can realize the conversion of CAN protocol to Profinet protocol, and well realize the monitoring center system through Siemens S7-1200 PLC. According to the communication command message of the DC servo drive, different commands are sent to control the start and stop and running speed of the servo motor connected to the drive, ensuring that the control center system can remotely control the operation and start and stop of the servo motor, and ensure the smooth implementation of the entire automation project!

Configuration parameter description:
Since the CAN protocol is the bottom layer protocol, the Profinet to CAN gateway has 8 dip switches. When communicating with CAN devices, you only need to use the dip switches to set the CAN baud rate and CAN2.0A or CAN2.0B and select 16 bytes of input and output to achieve CAN communication.
The data format of the Profinet to CAN gateway Profinet end (users do not need to understand, the gateway will handle it automatically) and CAN end is as follows: (refer to the Profinet to CAN manual)

Communication format of CAN device (servo drive):

Since the Profinet and CAN ends of the gateway communicate using 16-byte input and output data formats, in order to ensure the integrity and accuracy of the communication data, the corresponding input and output data lengths need to be configured in the configuration software so that the 16-byte input and output data can communicate in the data block mapped to the IQ address of the PLC, as shown in the figure below.

The data message output by the Profinet master station to the CAN device.
Conclusion:
By using the Profinet to CAN gateway of Bestun Technology Co., Ltd., the control center system can remotely monitor the DC servo drive in real time and then control the start and stop and speed of the servo motor connected to the lower end of the drive, ensuring the feasibility of the project. Profinet to CAN runs stably and reliably throughout the project!