Danfoss VLT AutomationDrive FC 301 Series Design Manual page 9

Contents
12.8 Examples
12.9 Modbus RTU Overview
12.10 Network Configuration
12.11 Modbus RTU Message Framing Structure
12.12 How to Access Parameters
MG33BF22
Design Guide
12.7.1 Content of a Character (byte)
12.7.2 Message Structure
12.7.3 Message Length (LGE)
12.7.4 Adjustable Frequency Drive Address (ADR)
12.7.5 Data Control Byte (BCC)
12.7.6 The Data Field
12.7.7 The PKE Field
12.7.8 Parameter Number (PNU)
12.7.9 Index (IND)
12.7.10 Parameter Value (PWE)
12.7.11 Supported Data Types
12.7.12 Conversion
12.7.13 Process Words (PCD)
12.8.1 Writing a Parameter Value
12.8.2 Reading a Parameter Value
12.9.1 Assumptions
12.9.2 What the User Should Already Know
12.9.3 Modbus RTU Overview
12.9.4 Adjustable Frequency Drive with Modbus RTU
12.11.1 Adjustable Frequency Drive with Modbus RTU
12.11.2 Modbus RTU Message Structure
12.11.3 Start/Stop Field
12.11.4 Address Field
12.11.5 Function Field
12.11.6 Data Field
12.11.7 CRC Check Field
12.11.8 Coil Register Addressing
12.11.9 How to Control the Adjustable Frequency Drive
12.11.10 Function Codes Supported by Modbus RTU
12.11.11 Modbus Exception Codes
12.12.1 Parameter Handling
12.12.2 Storage of Data
12.12.3 IND (Index)
Rev. 2014-04-04 All rights reserved.
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