Siemens SINAMICS G120 Instructions d'exploitation télécharger pdf (Page 150)

Functions

7.1 Overview of the inverter functions

Inverter with CU240B-2 and CU240E-2 Control Units

148 Operating Instructions, 01/2011, FW 4.4, A5E02299792B AB

Functions relevant to all applications Functions required in special applications only

The functions that you require in each application are shown

in a dark color in the function overview above.

You set these functions during the basic commissioning, so

that in many cases, the motor can be operated without

having to make any additional settings.

The functions whose parameters you only need to adapt

when actually required are shown in white in the function

overview above.

Inverter control is responsible for all of the other

inverter functions. Among other things, it defines

how the inverter responds to external control

signals.

Inverter control (Page 149)

The production functions avoid overloads and

operating states that could cause damage to the

motor, inverter and driven load. The motor

temperature monitoring, for example, is set

here.

Command sources (Page 158)

The command source defines where the control

signals are received from to switch on the motor,

e.g. via digital inputs or a fieldbus.

Protection functions (Page 175)

The status messages provide digital and analog

signals at the Control Unit outputs or via the

fieldbus. Examples include the current speed of

the motor or fault message issued by the

inverter.

Status messages (Page 181)

The setpoint source defines how the speed

setpoint for the motor is specified, e.g. via an

analog input or a fieldbus.

Setpoint sources (Page 159)

The functions matching the application allow

you to control a motor holding brake or

implement a higher-level pressure or

temperature control using the technology

controller, for example.

Application-specific functions (Page 182)

The setpoint calculation uses a ramp-function

generator to prevent speed steps occurring and

to limit the speed to a permissible maximum

value.

Setpoint calculation (Page 166)

The safety functions are used in applications

that must fulfill special requirements in terms of

functional safety.

Safe Torque Off (STO) safety function

(Page 220)

The motor closed-loop control ensures that the

motor follows the speed setpoint.

Motor control (Page 168)

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Siemens SINAMICS G120 Instructions d'exploitation Page 150

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