Danfoss VLT HVAC Drive FC 102 Design Manual page 8

Contents
7.5 Examples
7.6 Modbus RTU Overview
7.7 Network Configuration
7.8 Modbus RTU Message Framing Structure
7.9 Parameter Access
7.10 Examples
Design Guide
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)
7.5.1 Writing a Parameter Value
7.5.2 Reading a Parameter Value
7.6.1 Assumptions
7.6.2 Prerequisite Knowledge
7.6.3 Modbus RTU Overview
7.6.4 Adjustable Frequency Drive with Modbus RTU
7.7.1 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
7.9.6 Parameter Values
7.10.1 Read Coil Status (01 HEX)
7.10.2 Force/Write Single Coil (05 HEX)
7.10.3 Force/Write Multiple Coils (0F HEX)
7.10.4 Read Holding Registers (03 HEX)
Danfoss A/S © Rev. 2014-01-13 All rights reserved.
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MG16C122