ABB RMBA-01 User Manual
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Contents
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RMBA-01 User’s manual 2-1Chapter 2 – OverviewOverview This chapter contains a short description of the Modbusprotocol and the RMBA-01 Modbus Adapter module, adelivery checklist, and warranty information.Introduction toModbusModbus is a serial, asynchronous protocol. TheModbus protocol does not specify the physicalinterface. Typical physical interfaces are RS-232 andRS-485. The RMBA-01 provides a galvanically-isolatedRS-485 interface.Modbus is designed for integration with Modicon PLCsor other automation devices, and the services closelycorrespond to the PLC architecture. The RMBA-01supports the RTU protocol only.The RMBA-01Modbus AdaptermoduleThe RMBA-01 Modbus Adapter module is an optionaldevice for ABB drives which enables the connection ofthe drive to a Modbus system. The drive is consideredas a slave on the Modbus network. Through theRMBA-01 Modbus Adapter module it is possible to:• Give control commands to the drive(Start, Stop, Run enable, etc.)• Feed a motor speed or torque reference to the drive• Give a process actual value or a process reference tothe PID controller of the drive• Read status information and actual values from thedrive• Change drive parameter values• Reset a drive faultPhone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com |
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