SIEMENS
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Siemens IK PI · 2015
PROFINET/Industrial Ethernet
Motion Control System SIMOTION
PROFIdrive for SIMOTION
2
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Design
The device model of PROFIdrive
PROFIdrive defines a device model based on function modules
which cooperate in the device and generate the intelligence of
the drive system. These modules have objects assigned to them
which are described in the profile and are defined with respect
to their functions. The overall functionality of a drive is therefore
described through the sum of its parameters.
In contrast to other drive profiles, PROFIdrive defines only the
access mechanisms to the parameters as well as a subset
of approx. 30 profile parameters such as the fault buffer, drive
control and device identification.
All other parameters are vendor-specific which gives drive
manufacturers great flexibility with respect to implementing
function modules. The elements of a parameter are accessed
acyclically via data records.
As a communication protocol, PROFIdrive uses DP-V0, DP-V1,
and the DP-V2 expansions for PROFIBUS including the functions
"Slave-to-slave communication" and "Isochronous operation",
or PROFINET IO with real-time classes RT and IRT.
PROFIdrive for Motion Control
Utilization category 4 is the most important for highly dynamic
and highly complex Motion Control tasks. This application cate-
gory describes in detail the master/slave relationship between
the Controller and the drives which are connected to each other
over PROFINET and PROFIBUS.
The DSC (Dynamic Servo Control) function significantly
improves the dynamic response and stiffness of the position
control loop by minimizing the dead times which usually occur
for speed setpoint interfaces with an additional, relatively simple
feedback network in the drive. The position control loop is
closed in the drive which permits very fast position control
cycles (e.g. 125
s for SINAMICS S120) and thus limits dead
times exclusively to the control behavior.
PROFIdrive for SIMOTION
In SIMOTION, the drive interface has been implemented
according to the PROFIdrive profile V4 and application
categories 1 to 4 (category 4 with and without DSC).
When SINAMICS S120 operates with SIMOTION, utilization
category 4 with DSC is used as standard.
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More information
Further information about PROFINET and PROFIBUS
can be found at
www.profibus.com
See Downloads / Technical descriptions & books / PROFIdrive
Technology and Application – System Description
Further information about SIMOTION can be found in catalog
PM 21 and on the internet at:
www.siemens.com/simotion
G_PM10_EN_00133
Clock synchronism
Status Word + Actual Position ...
Control Word + Speed Setpoint + ...
Encoder
Encoder
Encoder
M
M
M
Closed Loop Speed Ctrl.
Drive
Closed Loop Speed Ctrl.
Drive
Closed Loop Speed Ctrl.
Drive
Clock
Application Class 4
Interpolation
Pos. Control
Technology
Automation
© Siemens AG 2014