ONLY 1 Function Block to Control Multiple Modbus RTU Slaves in TIA Portal
Struggling with multi-slave Modbus RTU communication in TIA Portal? In this video, I introduce a modular Modbus RTU Function Block (FB) designed to handle read and write operations for all network slaves using just ONE block call in your main PLC program!
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📋 GitHub Source Code & Library Link
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👇👇👇
github.com/mahdi-sheikhy/Siemens-S71200-ModbusRTU-MultiNode-Library
🔑 Key Highlights:
🚀 Zero-Code Scalability: Add/remove slave nodes dynamically by adjusting Data Block array dimensions—no code changes needed.
🛠 Flexible Data Handling: Supports 16, 32, and 64-bit structures across contiguous or scattered memory.
⚙️ Two Tailored Versions: Universal Version (with Data Converter FB) and a Lightweight Integer Version.
🔄 Word Swap: Built-in High/Low Word swapping for seamless non-Siemens device integration.
💻 Wide Compatibility: Works across TIA Portal V16–V21 on S7-1200, S7-1500, and S7-1200 G2.
📌 Video Chapters:
00:00 - Introduction & Modbus RTU Block Overview
02:21 - Differences Between Universal and Integer Versions
05:43 - Input & Output Parameters Review
08:02 - Data Block and UDT Configuration
10:16 - Addressing & Request Settings
15:04 - Importing the Library into TIA Portal
22:20 - Hardware Setup: Sinamics V20 & S7-1200
27:40 - Practical Test: Universal Version
35:20 - Practical Test: Swap Word Feature
36:40 - Practical Test: Integer Version
42:15 - Real-Time Node Troubleshooting & Debugging
48:30 - Online Data Traffic Monitoring
53:45 - Conclusion & Optimization Tips
#Siemens #TIAPortal #ModbusRTU #S71200 #SinamicsV20 #IndustrialAutomation #PLCProgramming #SCL