
Table of contents
SIMATIC ET 200pro FC-2 converter
Operating Instructions, 04/2015, FW V4.7.3, A5E34257324B AB 7
8.4 Setpoint calculation...............................................................................................................107
8.4.1 Overview of setpoint processing...........................................................................................107
8.4.2 Invert setpoint .......................................................................................................................108
8.4.3 Inhibit direction of rotation.....................................................................................................108
8.4.4 Skip frequency bands and minimum speed..........................................................................109
8.4.5 Speed limitation ....................................................................................................................110
8.4.6 Ramp-function generator ......................................................................................................110
8.5 Motor control .........................................................................................................................115
8.5.1 V/f control..............................................................................................................................115
8.5.1.1 Characteristics of U/f control.................................................................................................116
8.5.1.2 Selecting the U/f characteristic .............................................................................................117
8.5.1.3 Optimizing motor starting......................................................................................................118
8.5.2 Vector control........................................................................................................................120
8.5.2.1 Overview ...............................................................................................................................120
8.5.2.2 Select motor control ..............................................................................................................121
8.5.2.3 Optimizing the speed controller ............................................................................................122
8.5.2.4 Friction characteristic ............................................................................................................124
8.5.2.5 Moment of inertia estimator ..................................................................................................126
8.6 Protection and monitoring functions .....................................................................................132
8.6.1 Inverter temperature monitoring ...........................................................................................132
8.6.2 Monitor the motor temperature via a temperature sensor ....................................................135
8.6.3 Protecting the motor by calculating the motor temperature..................................................138
8.6.4 Overcurrent protection ..........................................................................................................139
8.7 Application-specific functions................................................................................................140
8.7.1 Functions that match the application ....................................................................................140
8.7.2 Unit changeover....................................................................................................................141
8.7.2.1 Changing over the motor standard .......................................................................................142
8.7.2.2 Changing over the unit system .............................................................................................142
8.7.2.3 Changing over process variables for the technology controller............................................143
8.7.2.4 Switching units with STARTER.............................................................................................143
8.7.3 Braking the motor electrically................................................................................................145
8.7.3.1 DC braking ............................................................................................................................145
8.7.3.2 Braking with regenerative feedback to the line.....................................................................148
8.7.4 Motor holding brake ..............................................................................................................148
8.8 Safe Torque Off (STO) safety function .................................................................................153
8.8.1 Description of functions.........................................................................................................153
8.8.2 Prerequisite for STO use ......................................................................................................156
8.8.3 Commissioning STO .............................................................................................................156
8.8.3.1 Commissioning tool...............................................................................................................156
8.8.3.2 Protection of the settings from unauthorized changes .........................................................157
8.8.3.3 Changing settings .................................................................................................................157
8.8.3.4 Interconnecting the "STO active" signal ...............................................................................158
8.8.3.5 Setting the STO input signal .................................................................................................159
8.8.3.6 Setting the forced checking procedure (test stop) ................................................................160
8.8.3.7 Activate settings....................................................................................................................161
8.8.3.8 Approval - completing commissioning ..................................................................................162
8.9 Switchover between different settings ..................................................................................166