Programming READ_VAR Function to Read Modbus TCP Device Data | Schneider Electric Support

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Are you ready to take your PLC programming skills to the next level? In this tutorial, we'll guide you through configuring a READ_VAR communication function block with a Modicon M340 PLC (programmable logic controller) using Unity Pro. We'll show you how to read data directly from a Modbus TCP/IP device, making your industrial automation projects more efficient.

➡️ Whether you're a seasoned programmer or just starting, this step-by-step guide will help you master Modicon PLCs and Modbus TCP.

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I believe the value 10 in the GEST array is timeout in 100ms time base, not the exchange length. 100 is the exchange length.

rajk

Does the "Directly represented array variables" Section affect the function of the READ_VAR as well? Only the "Allow dynamic array" selection was called out as a must have selected but you selected the aforementioned first.

jeremyg

Hello sir
plz give me a example of ATV DRIVE RUN WITH M340 ON MODBUS
IN FBD FORMET

ANKITKUMAR-ogdm

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