ABB DCS 500B Description page 6

Contents
Field heating when in "OFF"-state.............................................................................60
EMF_CONTROL function block.....................................................................................60
The Purpose of EMF Controller.................................................................................60
Selection of EMF-control...........................................................................................61
Resistive and inductive voltage drop .........................................................................61
Field weakening area ................................................................................................61
FLUX reference handling ..........................................................................................62
Flux Reference in Emergency Stop...........................................................................62
EMF reference handling............................................................................................62
PI - controller.............................................................................................................62
EMF-error value filter ................................................................................................63
PI -gain value scaling ................................................................................................63
PI - controller output limitation...................................................................................63
• Protections ...........................................................................................................................65
CONVERTER_PROTECTION function block ................................................................65
Network voltage measurement..................................................................................65
400 V supply .............................................................................................................65
Network undervoltage ...............................................................................................65
Network overvoltage .................................................................................................65
Overcurrent ...............................................................................................................65
Over -temperature.....................................................................................................66
Earth Fault ................................................................................................................66
MOTOR_1_PROTECTION function block .....................................................................67
MOTOR_2_PROTECTION function block .....................................................................67
Measured Motor Temperature...................................................................................67
Measurement selection .............................................................................................67
Alarm and tripping limits............................................................................................68
Motor Protection by means of the switch...................................................................69
Motor thermal model......................................................................................................69
Preloading.................................................................................................................71
Thermal model selection ...........................................................................................71
Alarm and tripping limits............................................................................................71
Thermal time constant...............................................................................................72
• Brake Control .......................................................................................................................76
Safety........................................................................................................................76
BRAKE_CONTROL function block ................................................................................76
Holding Torque .........................................................................................................76
Brake Release ..........................................................................................................76
Minimum Speed Indication ........................................................................................76
Brake Acknowledge ..................................................................................................76
Start Delay ................................................................................................................77
Stop Delay ................................................................................................................77
Function ....................................................................................................................77
TREF OUT ................................................................................................................79
TREF ENABLE..........................................................................................................79
DECEL CMND ..........................................................................................................79
LIFT BRAKE .............................................................................................................79
BRAKE RUN .............................................................................................................79
• Extended inputs / outputs.....................................................................................................81
iv DCS 500 Software Description