SIEMENS
SINAMICS DCM
DC Converter and Control Module
DC Converter
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Siemens D 23.1 · 2014
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More information
(continued)
Closed-loop control and open-loop drive control
The closed-loop control and open-loop drive control is essen-
tially designed for supplying the armature and field of variable-
speed DC drives.
Using BICO technology permits the closed-loop and open-loop
drive control structure to be simply adapted to the application-
specific requirements as well as the use in alternative applica-
tions (e.g. as excitation equipment for synchronous motors).
The most important functions of the closed-loop control include:
•
Setpoint processing (including digital setpoints, jogging,
motorized potentiometer)
•
Ramp-function generator
•
Speed controller actual value processing
•
Speed controller
•
Torque and armature current control
•
Closed-loop armature current control
•
Armature gating unit
•
Closed-loop EMF control
•
Closed-loop field current control
•
Field gating unit
BICO technology
BICO technology (Binector Connector Technology) allows signal
paths to be defined (and therefore the controller structure) using
parameters.
Mode of operation:
All important points of the closed-loop control are accessible via
connectors.
Connectors are measuring points that are mapped to display
parameters.
Important connectors include:
•
Analog inputs and outputs
•
Interface inputs (e.g. PROFIBUS)
•
Actual value sensing inputs (e.g. speed, armature current,
armature voltage)
•
Inputs and outputs of the ramp-function generator, speed
controller, armature current controller, armature gating unit,
EMF controller, field current controller, field gating unit
•
General quantities such as operating state, motor temperature
rise, thyristor temperature rise
All important binary signals of the closed-loop and open-loop
control are accessible via binectors.
Binectors are measuring points for binary signals, which are
mapped to display parameters.
Important binectors include:
•
Status of binary inputs
•
Control words, status words
•
Status of controllers, limits, faults
All of the important inputs of the open-loop and closed-loop
control can be interconnected using BICO selection parameters.
This means that by setting the corresponding BICO selection
parameter, a connection can be established between any
connector or binector.
Important inputs include:
•
Setpoint input, supplementary setpoint input
•
Ramp-function generator input
•
Speed controller input
•
Armature current controller input
•
Armature gating unit input
•
Speed setpoint limiting (before and after the ramp-function
generator)
•
Torque limiting
•
Armature current limiting
•
Signal source for binary and analog outputs
Data sets
Many open-loop and closed-loop control parameters depend on
the particular data set. This means that they have several indices
where various values can be set. All data set dependent para-
meters can be simultaneously switched over to another data set
using binary control signals.
There are two groups of data set-dependent parameters:
•
DDS parameters:
Parameters that are associated with the drive data set (DDS).
The drive data set contains various adjustable parameters that
are relevant for open-loop and closed-loop drive control.
•
CDS parameters:
Parameters that are associated with the command data set
(CDS). Many BICO selection parameters are combined in the
command data set. These parameters are used to intercon-
nect the signal sources of a drive.
By parameterizing several command data sets and switching
between them, the drive can be operated with different pre-
configured signal sources.
© Siemens AG 2014