Danfoss VLT HVAC Basic Drive FC 101 Design Manual page 5

Contents
7.5 Examples
7.6 Modbus RTU Overview
7.7 Network Configuration
7.8 Modbus RTU Message Framing Structure
7.9 How to Access Parameters
MG18C522
Design Guide
7.4.1 Content of a Character (byte)
7.4.2 Message Structure
7.4.3 Message Length (LGE)
7.4.4 Adjustable Frequency Drive Address (ADR)
7.4.5 Data Control Byte (BCC)
7.4.6 The Data Field
7.4.7 The PKE Field
7.4.8 Parameter Number (PNU)
7.4.9 Index (IND)
7.4.10 Parameter Value (PWE)
7.4.11 Data Types Supported by the Adjustable Frequency Drive
7.4.12 Conversion
7.4.13 Process Words (PCD)
7.6.1 Assumptions
7.6.2 What the User Should Already Know
7.6.3 Modbus RTU Overview
7.6.4 Adjustable Frequency Drive with Modbus RTU
7.8.1 Adjustable Frequency Drive with Modbus RTU
7.8.2 Modbus RTU Message Structure
7.8.3 Start/Stop Field
7.8.4 Address Field
7.8.5 Function Field
7.8.6 Data Field
7.8.7 CRC Check Field
7.8.8 Coil Register Addressing
7.8.9 How to Control the Adjustable Frequency Drive
7.8.10 Function Codes Supported by Modbus RTU
7.8.11 Modbus Exception Codes
7.9.1 Parameter Handling
7.9.2 Storage of Data
7.9.3 IND
7.9.4 Text Blocks
7.9.5 Conversion Factor
Danfoss A/S © Rev. 2014-01-14 All rights reserved.
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