Tutorial On How To Set UP Modbus Over TCP/IP for M580

[ANF-Energy]

Although I have over 20 years experience in developing embedded systems, I am a newbie to M580 PAC. I am trying to set up Modbus over TCP/IP but cannot find an outline or tutorial that shows me all the steps. I have found some articles troubleshooting someone's setup but I am looking for a "walkthrough" style outline. Any help would be appreciated. 

[RoozeeR · Accepted solution]

I'm not sure what you mean by "Set UP Modbus Over TCP/IP for M580", but I assume you mean how to set up a Modbus Client in the M580 to read or write data from a Modbus/TCP server.

2 things to consider here: What Modbus Functions (1-23) are supported by this Modbus server?

1: In case of Function code 3 & 16 you can use so called I/O scanning using the DTM browser. Note this uses only FC3 (read holding registers), FC16 (write holding registers) and FC23 (read/write holding registers.

To setup up you can use this link: https://www.youtube.com/watch?v=iHOzyGZ8pQU&list=PLa7UGrWOTyjmmdyweOFrYny3ZKwq1DbBC

2: In all other cases you can use Function Blocks (READ_VAR, WRITE_VAR and DATA_EXCH) to  communicate. To setup, read the communication library manual, showing several examples:  https://www.se.com/us/en/download/document/33002527K01000/

Youtube has a lot of examples to show: https://www.youtube.com/playlist?list=PLa7UGrWOTyjmmdyweOFrYny3ZKwq1DbBC

[ANF-Energy]

EUREKA! Modbus over TCP/IP now works! And my boss confirmed we're getting the correct values from the remote device! Thank you so much! Your references were what I needed! Although I still have questions, I can research them myself. 

[MatthewM]

Make certain you set a timeout value, as blank means wait forever which will lock up the block if it doesn't get a reply.  This catches people out if they don't pay attention to the details.