10/13/2021 8:30 PM | |
Joined: 9/27/2006 Last visit: 9/22/2024 Posts: 12282 Rating: (2685) |
Hello W1;
Now that you have made the S7-1500 as a Modbus TCP server, maybe you should take a few moments to understand the relationship between a client and a server. this is explained in the following link, with the most important details here in quotes: " (Mpdbus)TCP must establish a connection before transferring data, since it is a connection-based protocol. The Master (or Client in Modbus TCP) establishes a connection with the Slave (or Server). The Server waits for an incoming connection from the Client. Once a connection is established, the Server then responds to the queries from the Client until the client closes the connection." https://www.simplymodbus.ca/TCP.htm In other words, a Modbus TCP server cannot read or write to a client; your server cannot "access to the parameters read-only from clients". It is the client who can send (write) data to the server, and who can request (read) data from the server. All read and write instructions on Modbus TCP must be programmed in the client. Hope this helps, Daniel Chartier |
Last edited by: dchartier at: 10/13/2021 20:38:25 |
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