Table of contents
Converter with control units CU250D-2
Operating Instructions, 04/2015, FW V4.7.3, A5E34261542B AB
9
7.1 Overview of the converter functions ..................................................................................... 113
7.2 Inverter control ...................................................................................................................... 115
7.2.1 Adapt inputs and outputs ...................................................................................................... 115
7.2.1.1 Digital inputs ......................................................................................................................... 116
7.2.1.2 Fail-safe digital input ............................................................................................................. 117
7.2.1.3 Digital outputs ....................................................................................................................... 119
7.2.2 Switching the motor on and off ............................................................................................. 120
7.2.3 Running the motor in jog mode (JOG function) .................................................................... 122
7.2.4 Switching over the inverter control (command data set) ...................................................... 124
7.3 Setpoints ............................................................................................................................... 126
7.3.1 Overview ............................................................................................................................... 126
7.3.2 Specifying the setpoint via the fieldbus................................................................................. 127
7.3.3 Motorized potentiometer as setpoint source ......................................................................... 128
7.3.4 Fixed speed as setpoint source ............................................................................................ 130
7.4 Setpoint calculation ............................................................................................................... 133
7.4.1 Overview of setpoint preparation .......................................................................................... 133
7.4.2 Invert setpoint ....................................................................................................................... 134
7.4.3 Inhibit direction of rotation ..................................................................................................... 135
7.4.4 Skip frequency bands and minimum speed .......................................................................... 136
7.4.5 Speed limitation .................................................................................................................... 137
7.4.6 Ramp-function generator ...................................................................................................... 138
7.5 Motor control ......................................................................................................................... 143
7.5.1 V/f control .............................................................................................................................. 143
7.5.1.1 Characteristics of U/f control ................................................................................................. 144
7.5.1.2 Selecting the U/f characteristic ............................................................................................. 145
7.5.1.3 Optimizing motor starting ...................................................................................................... 145
7.5.2 Vector control with speed controller ...................................................................................... 147
7.5.2.1 Checking the encoder signal ................................................................................................ 148
7.5.2.2 Select motor control .............................................................................................................. 149
7.5.2.3 Optimizing the speed controller ............................................................................................ 150
7.5.2.4 Advanced settings ................................................................................................................. 152
7.5.2.5 Friction characteristic ............................................................................................................ 153
7.5.2.6 Moment of inertia estimator .................................................................................................. 156
7.5.3 Operating the converter without position controller .............................................................. 161
7.6 Basic positioner and position control .................................................................................... 163
7.6.1 Basic positioner and position control ....................................................................................
163
7.6.2 Commissioning sequence ..................................................................................................... 164
7.6.3 Normalizing the encoder signal ............................................................................................ 165
7.6.3.1 Define the resolution ............................................................................................................. 165
7.6.3.2 Modulo range setting ............................................................................................................ 167
7.6.3.3 Checking the actual position value ....................................................................................... 169
7.6.3.4 Setting the backlash.............................................................................................................. 170
7.6.4 Limiting the positioning range ............................................................................................... 172
7.6.5 Setting the position controller ............................................................................................... 174
7.6.5.1 Precontrol and gain ............................................................................................................... 174
7.6.5.2 Optimizing the position controller .......................................................................................... 175
7.6.5.3 Limiting the traversing profile ................................................................................................ 178
7.6.6 Setting the monitoring functions ........................................................................................... 180
7.6.6.1 Standstill and positioning monitoring .................................................................................... 180
7.6.6.2 Following error monitoring .................................................................................................... 182
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