Step7 300 - Modbus Coaching, Tag Addressing

I’m extending an S7-300 project and want a real-time mentor while I do the work myself. The original code already controls hard-wired and Profinet devices; my new function must drive a remote unit over Modbus TCP PN, so I need targeted guidance on:

• Creating and correctly addressing new Tags in Step7 (the area that trips me up most).
• Understanding Modbus TCP PN at a practical level, especially how to map the required registers so the remote unit behaves exactly like the existing field devices.

Plan
We’ll screen-share on Microsoft Teams or WhatsApp. I expect an initial 5 hours broken into sessions that suit our schedules, with the possibility of follow-up time later. During each call I’ll share my project, apply your advice live, and confirm that tag addressing and register mapping are rock-solid before moving on.

If you’re comfortable troubleshooting Step7 tags and Modbus register mapping on the fly, let’s set up our first session.