5.5
Communication
The control system and the individual drive objects communicate using an extended standard
telegram, for example standard telegram 2, see function diagram "7366 – Standard telegram 2
extended, control word, status word (Page 78)".
Precondition
The following general conditions apply regarding the communication:
● The RAILCTRL Technology Extension must be installed on a CU and be activated for every
SERVO drive object (every segment) involved along the path.
● An instance of the RAILCTRL Technology Extension with its own parameters exists for each
segment.
● Every SERVO drive object (segment) must be interconnected with its predecessor and
successor segments using RAILCTRL parameters.
Segment transition
For the segment transition with the RAILCTRL Technology Extension, the SERVO drive
objects communicate within a Control Unit.
Function diagram "7361 – Geometry data, interconnection of SERVO drive objects (Page 73)"
shows the interconnection of the segments within a Control Unit.
For the jerk-free transition, the motor segments for the RAILCTRL Technology Extension can
be brought into the following states:
● "Slave preceding"
● "Master"
● "Slave following"
● "Off"
The segment states are switched depending on the associated application mode:
● Segment transition in open-loop-controlled operation
The sequential control for the segment transition is taken from the higher-level control
system. Whereby, the value for the control word of the sequential control is provided as an
extended standard telegram from the higher-level control system.
● Segment transition in closed-loop-controlled operation
In closed-loop-controlled operation, the geometrical data are calculated based on the
evaluated encoder values. The transitions between states are modeled based on the
geometrical data. To change the states of two segments synchronously, the encoder values
of the adjacent segments are evaluated in parallel.
With the coupling of the segments, the controlled variables are transferred from the master to
the slave.
Function description
5.5 Communication
RAILCTRL
38
Function Manual, 09/2019, A5E38120767B
Содержание SINAMICS RAILCTRL
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Страница 14: ...Safety instructions 2 3 Industrial Security RAILCTRL 12 Function Manual 09 2019 A5E38120767B ...
Страница 18: ...Applications and characteristics 3 2 Features RAILCTRL 16 Function Manual 09 2019 A5E38120767B ...
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