ABB REPL-01 User Manual

Contents

Communication profiles33Reference of the DSP 402 profileIn the velocity operation mode, the reference is called Targetvelocity (object 0x6042 hex). It is a 16-bit word containing a signbit and a 15-bit integer. A negative reference (indicating reverseddirection of rotation) is formed by calculating the two'scomplement from the corresponding positive reference. Thereference is used to control the speed of the drive.The unit of the target velocity is rpm. This value can be scaled withthe Vl dimension factor object (object 0x604C hex):Reference to drive = Target velocity ◊ Vl dimension factorThe scaling is 1 by default.Actual value of the DSP 402 profileIn the velocity operation mode, the actual value is called Controleffort (object 0x6044 hex). It is a 16-bit word containing a sign bitand a 15-bit integer. A negative actual value (indicating reverseddirection of rotation) is formed by calculating the two'scomplement from the corresponding positive actual value. Theactual value is used by the master to monitor the actual speed ofthe drive.The unit of the control effort is rpm. This value can be scaled withthe Vl dimension factor object (object 0x604C hex):Drive actual speed = Control effort ◊ Vl dimension factorThe scaling is 1 by default.ABB Drives communication profileThe Control Word and the Status WordThe Control Word is the principal means for controlling the drivefrom a fieldbus system. It is sent by the fieldbus master station tothe drive through the adapter module. The drive switches betweenits states according to the bit-coded instructions on the ControlWord, and returns status information to the master in the StatusWord.Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com