09.2008 Functions
Siemens AG 6SE7087-6QX70 (Version AK)
SIMOVERT MASTERDRIVES Compendium Motion Control 7-27
Example (referred to factory setting):
Rated V = 12288.00 [1000 LU/Min],
results in the following with a desired runup time of 1 second from
0 → 100 %
²]/ 1000[ 80.204
160
]/ 1000[ 00.12288
857 sLU
MinLU
U =
×
=
the value calculated for the rated acceleration is transferred to
parameter U857. It is used to normalize the acceleration setpoint
(U852.1 or U869.x) and the deceleration setpoint (U852.2 or U869.x),
which are specified in percent.
Rated acceleration/deceleration U857 = 0 or
acceleration/deceleration setpoint in per cent via U869.1 / .2 = 0 means
maximum acceleration / deceleration.
If an absolute encoder and odd-order gear factors are used, position
tracking has to be used (see Chapter 9.4.9 and 9.4.10).
You will find the basic description on the use of absolute encoders in
Chapter 9.4.6.
NOTE
NOTE
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