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