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6 Description of the Functions
6.3
Axis couplings (from SW 3.3)
"SIMODRIVE 611
universal" as
master drive,
angular increm.
encoder interface
"SIMODRIVE 611
universal" as slave
drive
6-432
"SIMODRIVE 611 universal" assumes that when the position reference
value XsollP is output via PROFIBUS–DP, that it is being used as
master drive. In order that the master and slave drive simultaneously
process the position reference values, the master drive correspondingly
delays transferring data to its own position controller. If the position ref-
erence value is only to be output for diagnostic purposes, then the
delay can be disabled using P1004.9 = 0.
The angular incremental encoder interface (X461/X462) is set as out-
put with P0890 = 1. This means that the incremental position actual
value of the motor encoder or a direct measuring system is output (re-
fer to Chapter 6.8.1).
An interface for an external position reference value is available in the
"positioning" mode (P0700 = 3).
Possible signal sources include:
S
PROFIBUS–DP
S
Angular incremental encoder interface (X461/X462, switched as in-
put)
S
Internal coupling in the double axis module
The external position reference value is entered via PROFIBUS–DP
with the following process data
S
Xext (external position reference value, number 50207)
Depending on the actual requirements, it is possible/necessary to out-
put additional process data.
The normalization of the process data XsollP, XistP (master drive) or
Xext (slave drive) can be parameterized using a numerator/denomina-
tor pair This means that not only is a coupling possible between
"SIMODRIVE 611 universal" drives, but also with other bus nodes (DP
master or DP slave).
When the interface is switched–in, the drive responds to absolute posi-
tion reference values which are entered via the angular incremental
encoder interface, switched as input, or PROFIBUS–DP. In addition,
traversing blocks can be executed, which result in superimposed mo-
tion.
When the interface is switched–out, the drive can execute, as usual,
autonomous movements via traversing blocks.
The position reference value interface can be switched–in/switched–out
via an input signal (PROFIBUS–DP or terminal) or via a traversing
block.
The following possibilities are available to reference incremental posi-
tion measuring systems:
S
When the interface is switched–out, the drive can be individually
referenced as usual (refer to Chapter 6.2.4).
S
When the interface is switched–in, the drive follows the reference
motion of the master drive via the "passive referencing" function
(from SW 5.1).
SIMODRIVE 611 universal Description of Functions (FBU) – 04.05 Edition
E Siemens AG 2005 All Rights Reserved
02.02
01.99
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