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PSTX Softstarter Built-in Modbus RTU Communication Manual

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This document provides a comprehensive technical manual for configuring and using the built-in Modbus RTU fieldbus communication interface on ABB PSTX softstarters. It covers protocol addressing, data telegrams (digital/analog input/output), control words, parameter settings, troubleshooting, and a step-by-step example application using Automation Builder for PLC integration.

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