Danfoss VLT FC 102 Series Design Manual page 6

Contents
8 Installation and Set-up
8.1 Installation and Set-up
8.2 Adjustable Frequency Protocol Overview
8.3 Network Configuration
8.4 FC Protocol Message Framing Structure
8.5 Examples
8.6 Modbus RTU Overview
8.7 Network Configuration
8.8 Modbus RTU Message Framing Structure
Design Guide
8.4.1 Content of a Character (byte)
8.4.2 Message Structure
8.4.3 Message Length (LGE)
8.4.4 Adjustable Frequency Drive Address (ADR)
8.4.5 Data Control Byte (BCC)
8.4.6 The Data Field
8.4.7 The PKE Field
8.4.8 Parameter Number (PNU)
8.4.9 Index (IND)
8.4.10 Parameter Value (PWE)
8.4.11 Data Types Supported by the Adjustable Frequency Drive
8.4.12 Conversion
8.4.13 Process Words (PCD)
8.5.1 Writing a Parameter Value
8.5.2 Reading a Parameter Value
8.6.1 Assumptions
8.6.2 What the User Should Already Know
8.6.3 Modbus RTU Overview
8.6.4 Adjustable Frequency Drive with Modbus RTU
8.8.1 Adjustable Frequency Drive with Modbus RTU
8.8.2 Modbus RTU Message Structure
8.8.3 Start/Stop Field
8.8.4 Address Field
8.8.5 Function Field
8.8.6 Data Field
8.8.7 CRC Check Field
8.8.8 Coil Register Addressing
8.8.9 How to Control the Adjustable Frequency Drive
Danfoss A/S © Rev. 06/2014 All rights reserved.
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MG11BC22