MB_MASTER | DATA_PTR Explained | P# Pointer, DB Address & Symbolic Address

In this video, we will learn how to use the DATA_PTR parameter in the Siemens MB_MASTER block for Modbus RTU communication using Siemens S7-1200 PLC and TIA Portal. This tutorial explains all major DATA_PTR addressing methods step by step with practical examples. Topics Covered: ✔ What is DATA_PTR in MB_MASTER ✔ Complete DB Address Method ✔ Particular DB Address Method ✔ P# Pointer Method (Absolute Addressing) ✔ Symbolic Addressing in TIA Portal ✔ Modbus Register Mapping ✔ DATA_LEN Working Principle ✔ Sequential Register Reading ✔ Array Addressing in DB ✔ MB_MASTER Read Input Registers Example ✔ Practical Modbus RTU Communication Demo Practical Examples: Read single Modbus register Read multiple Modbus registers Store data into DB array Use P#DB4.DBX6.0 INT 3 syntax Read data using symbolic tags Software & Hardware Used: Siemens S7-1200 PLC CB1241 RS485 Module TIA Portal Modbus Slave Software This video is very useful for beginners and automation engineers working on: Modbus RTU Communication Siemens PLC Programming TIA Portal Projects Industrial Automation #Siemens #S71200 #ModbusRTU #MB_MASTER #TIAPortal #PLCProgramming #IndustrialAutomation #DATA_PTR #ModbusCommunication #CB1241 #PLC #Automation #ModbusMaster