Hi friends

We are using Eurotherm 3504 Controllers for Temperature Control Units , And our CPU is Siemens S7-1515-2PN.

I have been searching for GSD file for Eurotherm 3504 Controller to connect the same by Modbus TCP/IP via Profinet gateway of the CPU.

Kindly guide us for the communication of the same

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Split from Connect S7-1513-1PN & EUROTHERM NANODAC via PROFINET TCP/IP MODBUS.

Hello k.dev;

A GSD file is used to describe to a Profibus-DP master the data exchange capabilities of a Profibus-DP slave, and to allow the slave to be placed in the master's configuration.

If you are planning to (or have to) use Modbus/TCP, you cannot use a GSD file (even if there is one available.

What you need is the Modbus mapping of the slave: the list of available registers, with their addressing and description; this should be provided by the manufacturer of the slave, so go to Eurotherm's website and search for the 3504 Modbus mapping.

Next you need to know how to program the Modbus/TCP exchanges on the Modbus client (master); in my earlier response I had already given a link for the modbus/TCP instructions on the S7-1500. Here it is again:

Along with the FAQ suggested by Towome earlier, you will find in the following link a sample program for Modbus/TCP communications using a s7-1500, by our friend and TIA Portal master Pegaia; use it as a basis for your own design:

Sample Program: Modbus TCP with S7-1500

https://support.industry.siemens.com/tf/ww/en/posts/98690/

If you need a refresher on Modbus communications, including Modbus addressing and Modbus Function codes, I can suggest our friend smiffy's terrific presentation on the subject; the generalities apply both for Modbus RTU and Modbus/TCP.

Modbus General Description

https://support.industry.siemens.com/tf/fr/en/posts/66876/

Hope this helps,

Daniel Chartier