Siemens MICROMASTER 440 Operating Instructions Manual page 46

3 Functions
3.7 Communications ................................................................................................... 108
3.7.1 USS bus configuration via COM link (RS485) ...................................................... 111
3.8 Fixed frequencies (FF).......................................................................................... 112
3.9 Motorized potentiometer (MOP) ........................................................................... 115
3.10 JOG....................................................................................................................... 117
3.11 PID controller (technological controller)................................................................ 118
3.11.1 PID dancer roll control .......................................................................................... 120
3.11.2 PID motorized potentiometer (PID-MOP) ............................................................. 121
3.11.3 PID fixed setpoint (PID-FF)................................................................................... 122
3.12 Setpoint channel ................................................................................................... 123
3.12.1 Summation and modification of the frequency setpoint (AFM)............................. 123
3.12.2 Ramp-function generator (RFG) ........................................................................... 125
3.13 Free function blocks (FFB) ................................................................................... 128
3.14 Motor holding brake (MHB)................................................................................... 133
3.15 Electronic brakes .................................................................................................. 136
3.15.1 DC braking ............................................................................................................ 136
3.15.2 Compound braking................................................................................................ 139
3.15.3 Dynamic braking ................................................................................................... 140
3.16 Automatic restart................................................................................................... 145
3.17 Flying restart ......................................................................................................... 147
3.18 Closed-loop Vdc control........................................................................................ 149
3.18.1 Vdc_max controller ............................................................................................... 149
3.18.2 Kinetic buffering (Vdc_min controller)................................................................... 151
3.19 Positioning down ramp ......................................................................................... 152
3.20 Monitoring functions / messages .......................................................................... 154
3.20.1 General monitoring functions / messages ............................................................ 154
3.20.2 Load torque monitoring......................................................................................... 156
3.21 Thermal motor protection and overload responses .............................................. 158
3.21.1 Thermal motor model............................................................................................ 160
3.21.2 Temperature sensor.............................................................................................. 160
3.22 Power module protection ...................................................................................... 162
3.22.1 General overload monitoring ................................................................................ 162
3.22.2 Thermal monitoring functions and overload responses........................................ 163
3.23 Open-loop/closed-loop control technique ............................................................. 165
3.23.1 V/f control.............................................................................................................. 165
3.23.1.1 Voltage boost ........................................................................................................ 167
3.23.1.2 Current limiting (Imax controller)........................................................................... 169
3.23.1.3 Slip compensation................................................................................................. 170
3.23.2 Vector control........................................................................................................ 171
3.23.2.1 Vector control without speed encoder (SLVC) ..................................................... 173
3.23.2.2 Vector control with speed encoder (VC) ............................................................... 175
3.23.2.3 Speed controller.................................................................................................... 176
3.23.2.4 Closed-loop torque control.................................................................................... 181
3.23.2.5 Limiting the torque setpoint................................................................................... 182
46
MICROMASTER 440 Operating Instructions
6SE6400-5AW00-0BP0
Issue 10/03