Quickstart GuideABB PLC and drives integration using Modbus RTUModbus RTU ‐ 4 ‐ PLC and drives integrationIntroductionThis guide will take you through the hardware installation and configuration of ABB ACS Drives and PLC in order toprepare for Modbus RTU control. ABB‐specific ready‐made function blocks and visualizations from the PS553‐DRIVES library will be used for the control of the drives. While the guide is applicable to all AC500 PLCs and allModbus RTU compatible ABB ACS drives, the example is built up with an AC500‐eCo PLC and an ACS355 drive.Note! The material in this application might need to be adapted according to actual equipment and functionbefore it is used. Testing of the equipment must always be performed by the responsible start‐up person accordingto current legislation before the equipment is placed in service. ABB does not take any responsibility for possibledamage caused by using the material in this application (shown examples, data, project tools, etc.).Safety instructionsFollow all safety instructions delivered with the used components: Read the complete safety instructions for the used drive before you install, commission or use the drive.The complete safety instructions are given at the beginning of the drives user’s manual (e.g. for ACS355:3AUA0000066143 [English]). Read all safety and installation instructions of the used PLC. See the online help in CoDeSys (Help →Contents → Target System → AC500 / S500 → Introduction → Overview → Regulations).LimitationsThe following limitations are valid for this guide: Generalo All instructions in this guide are based on default settings in PLC and driveso PS501 Control Builder Plus version 2.2.0 or latero The drive must be equipped with embedded Modbus RTU or a Modbus RTU adapter Function block and visualization library PS553‐DRIVES compatibilityo Communication profile: ABB driveso Drive types: All Modbus RTU compatible ABB ACS driveso Application types: Speed/Frequency control or Torque control