SIEMENS
SINAMICS DCM
DC Converter and Control Module
General information
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Siemens D 23.1 · 2014
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Function
(continued)
Overview, closed-loop control structure
Function
Description
Communication between drive components
(continued)
OALINK
OALINK (Open Application Link) allows two Control Units to exchange data directly. A higher-level master is not required.
The following Control Units support the OALINK:
• CU320-2
• Advanced CUD
The communication system is based on DRIVE-CLiQ which means that no hardware components other than the
DRIVE-CLiQ line are required. OALINK must be loaded as a technology package.
A software license is required when it is installed on the CU320-2. The article number for the Certificate of License (CoL)
is 6SL3077-0AA01-0AB0.
No license is required on the Control Unit CUD of the SINAMICS DC MASTER.
OALINK permits the cyclic transmission of a total of 120 words which can comprise the following data types:
• Integer16 (1 word)
• Integer32 (2 words)
• FloatingPoint32 (2 words)
For instance, OALINK can be used for the following applications:
• Torque distribution for n drives
• Setpoint cascading for n drives
• Load distribution of drives coupled through a material web
• Technology expansion for the SINAMICS DCM (CU320-2 as T400 substitute)
• Couplings between SINAMICS units
Speed
setpoint
processing
Speed
control
EMF setpoint
processing
Closed-loop
EMF control
(field
weakening
control)
Speed actual
value
sensing
Field current
control
Armature
current
control
Line analysis,
armature
Line analysis,
field
Field
gating unit
I
f
sensing
V
a
and EMF
sensing
EMF actual value
I
a
sensing
1U1 1V1 1W1
3W1
3U1
3U1
Armature
thyristor
bridge
Field
thyristor
bridge
Field
Armature
M
T
Firing pulses,
armature
Firing pulses,
field
Armature
gating unit
and auto-
reversing
module
Armature curr. actual value
Line zero
points
Line zero
points
Field current actual value
Torque/
current
limiting
Ramp-function
generator
n
-set
n
-set
M
-set
I
a
-set
I
f
-set
alpha
alpha
Shunt
G_D023_EN_00015a
1C
1D
3C
3D
Analog tachome-
ter or pulse
encoder
EMF set
Speed actual value
© Siemens AG 2014