15.3.5 Brake release ................................................................................................ 186
15.3.6 Current Limitation ......................................................................................... 186
15.3.7 External Fan ................................................................................................. 186
15.3.8 Warning Mask ............................................................................................... 187
15.3.9 Application warning mask .............................................................................. 190
15.4 Digital inputs ........................................................................................... 191
15.4.1 Start command ............................................................................................. 196
15.4.2 3-wire control ............................................................................................... 196
15.4.3 Error Acknowledgment .................................................................................. 197
15.4.4 Timer ........................................................................................................... 197
15.4.5 Thermo contact ............................................................................................. 197
15.4.6 n-/M Control Change-Over ............................................................................. 197
15.4.7 Data Set Change-Over ................................................................................... 198
15.4.8 Fixed Value Change-Over ............................................................................... 199
15.4.9 Motor Potentiometer ...................................................................................... 199
15.4.10 Handshake Traverse Function ........................................................................ 200
15.4.11 User warning ................................................................................................ 200
15.4.12 External error ............................................................................................... 200
15.5 Function Modules .................................................................................... 201
15.5.1 Timer ........................................................................................................... 201
15.5.1.1 Timer – Time Constant .................................................................................. 202
15.5.2 Comparator .................................................................................................. 204
15.5.3 Function table ............................................................................................... 205
15.5.4 Multiplexer/Demultiplexer .............................................................................. 206
16 V/f-Characteristic ...................................................................................................... 208
16.1 Dynamic Voltage Pre-Control ................................................................. 209
17 Control Functions ....................................................................................................... 210
17.1 Intelligent current limits ........................................................................ 210
17.2 Voltage controller ................................................................................... 211
17.3 Technology Controller ............................................................................. 216
17.4 Functions of Sensorless Control.............................................................. 226
17.4.1 Slip compensation ......................................................................................... 226
17.4.2 Current limit value controller .......................................................................... 226
17.5 Functions of Field-Orientated Control .................................................... 227
17.5.1 Current Controller ......................................................................................... 227
17.5.2 Extended Current Controller ........................................................................... 229
17.5.3 Torque Controller .......................................................................................... 229
17.5.3.1 Torque Reference .......................................................................................... 230
17.5.3.2 Upper and lower limit of the frequency in Torque Control ................................. 230
17.5.3.3 Limit Value Sources ....................................................................................... 231
17.5.3.4 Switching over between speed control and torque control ................................. 231
17.5.4 Speed controller ............................................................................................ 232
17.5.4.1 Limitation of Speed Controller ........................................................................ 234
17.5.4.2 Limit Value Sources ....................................................................................... 235
17.5.4.3 Integral time speed synchronization ................................................................ 236
17.5.5 Acceleration Pre-Control ................................................................................ 236
17.5.6 Field Controller ............................................................................................. 237
17.5.6.1 Limitation of field controller ............................................................................ 238
17.5.7 Modulation Controller .................................................................................... 239
17.5.7.1 Limitation of Modulation Controller ................................................................. 239
18 Special Functions ....................................................................................................... 240
18.1 Pulse Width Modulation .......................................................................... 240
18.2 Fan .......................................................................................................... 241
8 Operating Instructions ACU
06/13
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