Table of contents
Inverter with CU230P-2 Control Units
10 Operating Instructions, 11/2013, FW V4.6.6, A5E02430659B AG
8 Setting functions .................................................................................................................................. 225
8.1 Overview of the inverter functions ............................................................................................. 225
8.2 Inverter control .......................................................................................................................... 227
8.2.1 Switching the motor on and off ................................................................................................. 227
8.2.2 Two-wire control: method 1 ....................................................................................................... 230
8.2.3 Two-wire control, method 2 ....................................................................................................... 231
8.2.4 Two-wire control, method 3 ....................................................................................................... 232
8.2.5 Three-wire control, method 1 .................................................................................................... 233
8.2.6 Three-wire control, method 2 .................................................................................................... 234
8.2.7 Running the motor in jog mode (JOG function) ........................................................................ 235
8.2.8 Switching over the inverter control (command data set) ........................................................... 235
8.3 Setpoints ................................................................................................................................... 238
8.3.1 Analog input as setpoint source ................................................................................................ 239
8.3.2 Specifying the motor speed via the fieldbus ............................................................................. 239
8.3.3 Motorized potentiometer as setpoint source ............................................................................. 240
8.3.4 Fixed speed as setpoint source ................................................................................................ 242
8.4 Setpoint calculation ................................................................................................................... 244
8.4.1 Overview of setpoint processing ............................................................................................... 244
8.4.2 Invert setpoint ............................................................................................................................ 244
8.4.3 Enable direction of rotation ....................................................................................................... 245
8.4.4 Minimum speed ......................................................................................................................... 245
8.4.5 Maximum speed ........................................................................................................................ 246
8.4.6 Ramp-function generator .......................................................................................................... 247
8.5 Motor control ............................................................................................................................. 250
8.5.1 V/f control ..................................................................................................................................
250
8.5.1.1 Characteristics of V/f control ..................................................................................................... 251
8.5.1.2 Selecting the V/f characteristic .................................................................................................. 252
8.5.1.3 Optimizing with a high break loose torque and brief overload .................................................. 253
8.5.2 Closed-loop speed control ........................................................................................................ 255
8.5.2.1 Properties of the sensorless vector control ............................................................................... 255
8.5.2.2 Select motor control .................................................................................................................. 256
8.5.2.3 Optimizing the speed controller................................................................................................. 257
8.6 Protection functions ................................................................................................................... 259
8.6.1 Inverter temperature monitoring ................................................................................................ 259
8.6.2 Motor temperature monitoring using a temperature sensor ...................................................... 261
8.6.3 Protecting the motor by calculating the motor temperature ...................................................... 263
8.6.4 Overcurrent protection .............................................................................................................. 264
8.6.5 Limiting the maximum DC link voltage ...................................................................................... 265
8.7 Application-specific functions .................................................................................................... 267
8.7.1 Unit changeover ........................................................................................................................ 267
8.7.1.1 Changing over the motor standard ........................................................................................... 268
8.7.1.2 Changing over the unit system ................................................................................................. 269
8.7.1.3 Changing over process variables for the technology controller ................................................ 269
8.7.1.4 Switching units with STARTER ................................................................................................. 270
8.7.2 Energy-saving display ............................................................................................................... 272
8.7.3 Braking functions of the converter ............................................................................................ 273
8.7.3.1 Electrical braking methods ........................................................................................................ 273
8.7.3.2 DC braking ................................................................................................................................ 275
8.7.3.3 Compound braking ....................................................................................................................
278
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