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Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Technical Reference: Modbus Translator Module TABLE OF CONTENTS Introduction .....................................................................................................................4 Material Information.........................................................................................................4 Hardware Interface..........................................................................................................5 Serial Connectors .................................................................................................................5 Network Connectors .............................................................................................................5 LED Indicators ......................................................................................................................6 DB9F-to-TB Connector.........................................................................................................6 Specifications..................................................................................................................7 Power Requirements ............................................................................................................7 Mechanical ............................................................................................................................7 Environmental Specifications................................................................................................7 Modbus Translator Installation ........................................................................................7 Power Connection ................................................................................................................7 Software Installation..............................................................................................................8 Modbus Translator Setup .....................................................................................................8 Changing IP Address of Ethernet Port LAN2 ..................................................................8 Configuration Settings....................................................................................................10 Modbus Translator Connections.........................................................................................12 Modbus Translator Operation........................................................................................16 Modbus Introduction ...........................................................................................................16 Modbus Address.................................................................................................................16 Transaction Timing .............................................................................................................16 Data Format........................................................................................................................17 Modbus Protocol ...........................................................................................................17 Introduction .........................................................................................................................17 Modbus RTU Message Framing ........................................................................................18 Modbus RTU Message Content .........................................................................................18 Modbus Function and Exception Codes.............................................................................18 Supported Modbus Commands..........................................................................................19 Read Holding Registers (Function Code 03).................................................................19 Preset Single Register (Function Code 06) ...................................................................20 Preset Multiple Registers (Function Code 16)...............................................................20 Read Registers ...................................................................................................................22 Write Registers ...................................................................................................................40 Remapping Modbus Registers ......................................................................................46 Troubleshooting ............................................................................................................48 Capstone Technical Information....................................................................................50 Capstone Applications ........................................................................................................50 Capstone Service................................................................................................................50 Capstone Technical Support .........................................................................................50 Capstone Technical Support (Japan)............................................................................50 Appendix A - Modbus Translator Module Software Installation.................................... A-1 Appendix B – ASCII Chart ........................................................................................... B-1 410078 Rev A (July 2009) Page 2 of 53 Capstone reserves the right to change or modify, without notice, the design, specifications, and/or contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction.PDF Image | Technical Reference Modbus Translator Module (MOXA®)
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