Siemens SIMODRIVE 611 universal Function Manual page 585

01.99 04.99
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Reader's note
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Pulse frequency A dedicated power module pulse frequency (P1100) can be parameteri-
changeover
zed for each motor data set.
The speed requirement of the motor can be better adapted by changing
over the pulse frequency. With a higher pulse frequency, higher speeds
can be achieved.
The following applies for the pulse frequency, it must have at least
approx. 6 the frequency of the instantaneous motor frequency.
High pulse frequencies mean high switching losses and therefore poor
utilization.
At a pulse frequency of 8 kHz, only 40–55% of the possible current that
is available at 3.2 kHz is available.
E Siemens AG 2005 All Rights Reserved
SIMODRIVE 611 universal Description of Functions (FBU) – 04.05 Edition
6.11 Motor changeover for induction motors (from SW 2.4)
Input signals: refer under the index entry "Input signal..."
Output signals: refer under the index entry "Output signal ..."
The wiring of the input/output terminals for the control board and for
the optional TERMINAL module is described in Chapter 2.2.
The following input/output terminals are available:
– for the control board:
x: Space retainer for drive A or B
– for the optional TERMINAL module: I4 to I11 or O4 to O11
The parameterization of the input/output terminals is described as
follows:
– for the control board:
– for the optional TERMINAL module:
6 Description of the Functions
I0.x to I3.x or O0.x to O3.x
in Chapter 6.4.2 and 6.4.5
in Chapter 6.5
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