FIELDBUS COMMUNICATION 4. Modbus RTU - A set-up example 4.1. Softstarter PSE Built-in Modbus RTU communication This document describes an application example between a Modbus RTU master (PLC CPU, PC, etc.) and the ABB Softstarter PSE using the built-in Modbus RTU interface. In these exam- ples the slave Id of the Softstarter is 47. Please always use the actual Softstarter manuals. In this particular example following docu- ments has been used: – Softstarter PSE Installation and commissioning manual, document 1SFC132057M0201 4.2. Settings 1.
Set the Softstarter address and field bus communication Change the address of the Softstarter to 47 (Fieldbus Address) and enable fieldbus con- trol (Fieldbus control = On) 2. Set the communication parameters Change the communication parameters baud rate and frame format to match the Modbus network settings. 3. Select the Modbus RTU interface Change parameter Fieldbus interface type to Modbus RTU. STATUS Approved PAGE 14/22 © Copyright 2019 ABB. All rights reserved. SECURITY LEVEL Public DOCUMENT ID. 1SFC132367M0201 REV. B LANG. en