Siemens SIMATIC ET 200pro Series Operating Instructions Manual page 7

7.7 Safe Torque Off (STO) safety function ................................................................................. 111
7.7.1 Description of functions......................................................................................................... 112
7.7.2 Precondition for using STO ................................................................................................... 114
7.7.3 Commissioning STO ............................................................................................................. 114
7.7.3.1 Commissioning tool ............................................................................................................... 114
7.7.3.2 Protection of the settings from unauthorized changes ......................................................... 115
7.7.3.3 Changing settings ................................................................................................................. 115
7.7.3.4 Interconnecting the "STO active" signal ............................................................................... 116
7.7.3.5 Setting the STO input signal ................................................................................................. 117
7.7.3.6 Setting the forced checking procedure (test stop) ................................................................ 118
7.7.3.7 Activate settings .................................................................................................................... 119
7.7.3.8 Approval - completing commissioning .................................................................................. 120
7.8 Setpoints ............................................................................................................................... 124
7.8.1 Overview ............................................................................................................................... 124
7.8.2 Specifying the setpoint via the fieldbus................................................................................. 125
7.8.3 Motorized potentiometer as setpoint source ......................................................................... 125
7.8.4 Fixed speed as setpoint source ............................................................................................ 127
7.9 Setpoint calculation ............................................................................................................... 129
7.9.1 Overview of setpoint processing ........................................................................................... 129
7.9.2 Invert setpoint ....................................................................................................................... 130
7.9.3 Inhibit direction of rotation ..................................................................................................... 130
7.9.4 Skip frequency bands and minimum speed .......................................................................... 131
7.9.5 Speed limitation .................................................................................................................... 132
7.9.6 Ramp-function generator ...................................................................................................... 132
7.10 PID technology controller ...................................................................................................... 136
7.11 Motor control ......................................................................................................................... 141
7.11.1 V/f control .............................................................................................................................. 141
7.11.1.1 Characteristics of U/f control ................................................................................................. 142
7.11.1.2 Selecting the U/f characteristic ............................................................................................. 143
7.11.1.3 Optimizing motor starting ...................................................................................................... 144
7.11.2 Vector control ........................................................................................................................ 146
7.11.2.1 Structure of vector control without encoder (sensorless) ..................................................... 146
7.11.2.2 Select motor control .............................................................................................................. 147
7.11.2.3 Optimizing the speed controller ............................................................................................ 147
7.11.2.4 Friction characteristic ............................................................................................................ 149
7.11.2.5 Moment of inertia estimator .................................................................................................. 152
7.12 Braking the motor electrically ................................................................................................ 157
7.12.1 DC braking ............................................................................................................................ 157
7.12.2 Braking with regenerative feedback to the line ..................................................................... 160
7.13 Overcurrent protection .......................................................................................................... 161
7.14 Inverter protection using temperature monitoring ................................................................. 162
7.15 Motor temperature monitoring using a temperature sensor ................................................. 165
7.16 Motor protection by calculating the temperature .................................................................. 169
7.17 Stall protection ...................................................................................................................... 171
7.18 Efficiency optimization .......................................................................................................... 172
7.19 PROFIenergy profile for PROFINET ..................................................................................... 174
SIMATIC ET 200pro FC-2 converter
Operating Instructions, 09/2017, FW V4.7 SP9, A5E34257324B AE
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