9.4.9 Index (IND) 96
9.4.10 Parameter Value (PWE) 96
9.4.11 Data Types Supported by the Drive 97
9.4.12 Conversion 97
9.4.13 Process Words (PCD) 98
9.5 Examples 98
9.5.1 Writing a Parameter Value 98
9.5.2 Reading a Parameter Value 98
9.6 Modbus RTU 99
9.6.1 Prerequisite Knowledge 99
9.6.2 Overview 99
9.6.3 Drive with Modbus RTU 100
9.7 Modbus RTU Network Configuration 100
9.8 Modbus RTU Message Framing Structure 101
9.8.1 Introduction 101
9.8.2 Modbus RTU Telegram Structure 101
9.8.3 Start/Stop Field 101
9.8.4 Address Field 102
9.8.5 Function Field 102
9.8.6 Data Field 102
9.8.7 CRC Check Field 102
9.8.8 Coil Register Addressing 102
9.8.9 How to Control the Drive 105
9.8.10 Function Codes Supported by Modbus RTU 105
9.8.11 Modbus Exception Codes 106
9.9 How to Access Parameters 106
9.9.1 Parameter Handling 106
9.9.2 Storage of Data 107
9.9.3 IND (Index) 107
9.9.4 Text Blocks 107
9.9.5 Conversion Factor 107
9.9.6 Parameter Values 107
9.10 Examples 107
9.10.1 Overview of the Examples 107
9.10.2 Read Coil Status (01 hex) 107
9.10.3 Force/Write Single Coil (05 hex) 108
vi | Danfoss A/S © 2024.01 AJ435824192086en-000101 / 130R1295
Design Guide | VLT® AutomationDrive FC 360