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AVEVA™ PI System™ Feedback Portal

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Status Planned
Product Edge Data Store
Categories Ingress
Created by Hans-Otto Weinhold
Created on Oct 2, 2023

Documentation of EDS Modbus TCP Adapter needs to be updated on removed 32-bit register support for Modbus TCP Adapter


The current version of PI Adapter for Modbus TCP does not any longer support 32-bit Holding/Input registers as this is outside of the Modbus specifications.

However, in some cases, 32-bit register values have to be read from 16-bit registers.

The documentation still points out, that 32-bit registers are still supported. This is correctly documented in the standalone PI Adapter for Modbus TCP documentation ( but not with Edge Data Store (


Amendment of documentation for the Edge Data Store PI Adapter for Modbus TCP how this change impacts the configuration. Right now, the documentation is very misleading.

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