Help with the configuration and a proper implementation method
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There is a Siemens 300 system with a configuration of over 100 points, and there are also ten devices on site. These devices are equipped with PLC control systems from different manufacturers. It is now necessary to collect the data from these ten devices and integrate it into the Siemens 300 system for unified management. How can this be achieved, and what configurations are required?
The device is connected to the 485 bus; communication is successful once commands are sent.
Will a CP341 be sufficient?
Use the Siemens 300 as the master station and reconfigure it; the others are integrated into this Ethernet network as slave stations. Assign the addresses properly, use the DP bus for connection, and read the data from the corresponding stations. The prerequisite is that the communication protocols must be the same.
First, determine whether the other ten devices on site support data communication and what communication protocols they use (MODBUS or PROFIBUS); it’s possible that some of them support MODBUS while others support PROFIBUS. Assign communication addresses to each device, and then read the signals from each unit.
First, check whether each PLC supports sending data outward, and then see what types of buses it supports; only after that can a decision be made. If the internal code of each PLC does not support data transmission outward, rewriting the code would be very troublesome
This post was last edited by stone_HOTO on 2019-2-14 at 12:42. 1. First, determine whether to use MODBUS or PROFIBUS as the communication method for the system, or alternatives such as Ethernet or OPC. 2. Add the appropriate hardware interfaces and drivers for the S7-300. 3. Configure the device addresses and prepare the communication data tables. 4. Perform debugging