6
6.8 Angular incremental encoder interface (X461, X462)
6-560
Siemens AG 2005 All Rights Reserved
SIMODRIVE 611 universal Description of Functions (FBU) – 04.05 Edition
For several counter modules, encoder monitoring circuits erroneously
signal faults. This is the reason that there is a secondary module with a
lower sampling frequency which can prevent the erroneous response of
the encoder monitoring function, e.g. the SIMATIC FM 354.
Module, Order No. 6SN1118–0NH00–0AA2 (Catalog)
– Angular incremental encoder sampling frequency 32 MHz
– Multiple edges up to approx. 16 MHz
– Useful angular incremental encoder signal, max. to approx.
350 kHz (for encoders with 2048 pulses/rev. max. 10500 RPM)
Module, Order No.[MLFB] 6SN1118–0NH00–0BA2 (alternative)
– Angular incremental encoder sampling frequency 1.2 MHz
– Multiple edges up to approx. 600 kHz
– Useful angular incremental encoder signal, max. to approx.
200 kHz (for encoders with 2048 pulses/rev. max. 6000 RPM)
From the following module, it can be assumed that the encoder moni-
toring will no longer incorrectly respond for several counter modules.
Module Order No. [MLFB] 6SN1118–NH01–0AA
– Angular incremental encoder sampling frequency 4 MHz
– Multiple edges up to approx. 2 MHz
– Useful angular incremental encoder signal, max. to approx.
420 kHz (for encoders with 2048 pulses/rev. max. 12300 RPM)
If the angular incremental encoder interface is to be operated as set-
point input, as pulse/direction signal or as forwards/reverse signal, then
the angular incremental encoder interface of another ”SIMODRIVE 611
universal” module may not be used as setpoint source. The axis unde-
sirably traverses as a result of the multiple edges inherent to the
system.
If the angular incremental encoder interface is used as setpoint input
(pulse/direction signal or up/down signal), then a suitable setpoint
source, e.g. stepping motor control must be used with exactly the same
pulse number as master.
In order to couple to SIMODRIVE 611 universal modules, the quadra-
ture signal input signal waveform (P0894 = 0) should be used.
The following parameters must be observed when setting the angular
incremental encoder interface as output for incremental position actual
values:
P0890 Activates the angular incr. enc./encoder interface
P0892 Factor, angular incr. enc. pulse no./enc. pulse no.
P0893 Angular incremental encoder zero pulse offset
Angular
incremental
encoder interface
output for
pulse/direction
signal
Parameter
overview
(refer to Chapter
A.1)
6 Description of the Functions
02.03
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