Need to read data from the PLC above, and then by VS c # software write data to the database, and how did the read data from the PLC, grows a new call for backup or something

CodePudding user response:

Omron Hostlink agreement
Mitsubishi official component directly call
Siemens can walk some common standard protocol Moubus RTU/TCP, the TCP/IP, etc.
Can also through the OPC communication with PLC
Or refer to some third party libraries they integrate with a variety of PLC of the underlying communication according to API calls

CodePudding user response:

To see whether the PLC to provide what data communication services, and then through the network on the permanent address of the PLC data reception, accept the programs are written by vs, mainly depends on the PLC to provide documentation, see again to consider vs function for data