
Table of contents
SIMATIC ET 200pro FC-2 converter
Operating Instructions, 04/2018, FW V4.7 SP10, A5E34257324B AF 5
7.7.1 Description of functions.........................................................................................................117
7.7.2 ((Precondition for using STO))..............................................................................................119
7.7.3 Commissioning STO .............................................................................................................119
7.7.3.1 Commissioning tool...............................................................................................................119
7.7.3.2 Safety functions password....................................................................................................120
7.7.3.3 Protection of the settings from unauthorized changes .........................................................120
7.7.3.4 Configuring safety functions .................................................................................................121
7.7.3.5 Interconnecting the "STO active" signal ...............................................................................122
7.7.3.6 Setting the STO input signal .................................................................................................123
7.7.3.7 Setting the forced checking procedure (test stop) ................................................................124
7.7.3.8 Activate settings....................................................................................................................125
7.7.3.9 Approval - completing commissioning ..................................................................................126
7.8 Setpoints ...............................................................................................................................129
7.8.1 Overview ...............................................................................................................................129
7.8.2 Specifying the setpoint via the fieldbus.................................................................................131
7.8.3 Motorized potentiometer as setpoint source.........................................................................132
7.8.4 Fixed speed as setpoint source ............................................................................................136
7.9 Setpoint calculation...............................................................................................................138
7.9.1 Overview ...............................................................................................................................138
7.9.2 Invert setpoint .......................................................................................................................139
7.9.3 Inhibit direction of rotation.....................................................................................................139
7.9.4 Skip frequency bands and minimum speed..........................................................................140
7.9.5 Speed limitation ....................................................................................................................141
7.9.6 Ramp-function generator ......................................................................................................
141
7.10 PID technology controller......................................................................................................145
7.11 Motor control .........................................................................................................................150
7.11.1 V/f control..............................................................................................................................151
7.11.1.1 Characteristics of U/f control.................................................................................................152
7.11.1.2 Selecting the U/f characteristic .............................................................................................153
7.11.1.3 Optimizing motor starting......................................................................................................154
7.11.2 Vector control........................................................................................................................156
7.11.2.1 Structure of vector control without encoder (sensorless) .....................................................156
7.11.2.2 Select motor control ..............................................................................................................157
7.11.2.3 Optimizing the speed controller ............................................................................................157
7.11.2.4 Friction characteristic............................................................................................................159
7.11.2.5 Moment of inertia estimator ..................................................................................................162
7.12 Braking the motor electrically................................................................................................167
7.12.1 DC braking ............................................................................................................................167
7.12.2 Braking with regenerative feedback to the line.....................................................................171
7.13 Overcurrent protection ..........................................................................................................172
7.14 Inverter protection using temperature monitoring.................................................................173
7.15 Motor temperature monitoring using a temperature sensor .................................................176
7.16 Motor protection by calculating the temperature ..................................................................180
7.17 Breakdown protection ...........................................................................................................182
7.18 Efficiency optimization ..........................................................................................................183
7.19 PROFIenergy profile for PROFINET.....................................................................................186