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Download “USS + Modbus RTU” Labraries for Siemens S7-200 PLC

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Hello friends!
The USS and Modbus-RTU communication protocol is the most commonly used communication protocol in industry and many other fields. All PLCs support this communication standard and the Siemens S7-200 PLC is no exception.

However, when we install STEP7 MicroWIN V4.0 software, the library “USS + Modbus Libraries” is not available, but we have to install the Upgrade file, so today will share it with you this file.

Installation Guide “Siemens S7-200 USS + Modbus Libraries”

+ Step 1: Download and unzip the library (USS + Modbus for Siemens S7-200) with password “”

+ Step 2: Run the setup.exe file to install the library for STEP7 MicroWIN V4.0 software

Siemens S7-200 “Modbus RTU” Instruction

Siemens S7-200 Modbus Function Address
Siemens S7-200 Modbus Instruction

Installation Instruction Video


“S7-200 USS + Modbus Libraries” Download Link

Download via GoogleDrive
>>> Download Siemens S7-200 USS + Modbus-RTU Libraries Upgrade

Password Extract:


Update: Fix ERROR “V-Memory not allocated for library…”

When using Modbus-RTU protocol for PLC S7-200, we must declare VB (Variable Memory) memory area for PLC S7-200 to use it, otherwise we will get an error like the image below:

Video Tutorial Fix “V-Memory not allocated for library…”

If the Link Download the Upgrade file is broken or you have any problems during the installation process, please comment below the article, will reply to you as soon as possible.

Thanks and Best Regards!

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