Siemens SIMATIC ET 200pro Series Operating Instructions Manual page 90

Advanced commissioning
7.1 Overview of the inverter functions
Safety functions
The safety functions fulfill increased requirements regarding the functional safety of the
drive.
Setpoints and setpoint processing
The setpoint normally defines the motor speed.
The setpoint processing uses a ramp-function generator to prevent speed steps occurring
and to limit the speed to a permissible maximum value.
Technology controller
The technology controller controls process variables, e.g. pressure, temperature, level or
flow. The motor control receives the setpoint either from the higher-level control or from the
technology controller.
Motor control
The motor closed-loop control ensures that the motor follows the speed setpoint. You can
choose between various control modes.
The inverter has various methods to electrically brake the motor. During electrical braking,
the motor develops a torque that reduces the speed to standstill.
Protection of the drive and the driven load
The protection functions prevent damage to the motor, inverter and driven load.
The monitoring of the driven load prevents impermissible operating modes, e.g. dry-running
of a pump.
90
Safe Torque Off (STO) safety function (Page 111)
Setpoints (Page 124)
Setpoint calculation (Page 129)
PID technology controller (Page 136)
Motor control (Page 141)
Braking the motor electrically (Page 157)
Overcurrent protection (Page 161)
Inverter protection using temperature monitoring (Page 162)
Motor temperature monitoring using a temperature sensor (Page 165)
Motor protection by calculating the temperature (Page 169)
Stall protection (Page 171)
Operating Instructions, 09/2017, FW V4.7 SP9, A5E34257324B AE
SIMATIC ET 200pro FC-2 converter