SIEMENS
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Siemens D 21.4 · 2017
Tools and configuration
Configuration notes
SINAMICS S120 Control Units
13
■
Configuration
(continued)
Typical slip values for standard asynchronous motors (induction motors)
CU320-2: Axis licensing according to performance expansion (firmware version 4.3 and higher)
The CU320-2 is licensed purely according to axis number. The expanded performance is essentially required with four or more
servo axes, four or more vector axes and seven or more V/f axes, irrespective of computing capacity.
CU320-2: Possible quantity structures, maximum configurations
In addition to the number of axes, for example, the following
functions and hardware components also have an influence on
the possible quantity structure (maximum configuration) of the
CU320-2:
•
Extended Safety
• EPos
• DCC
•
CAN bus
•
High-speed Terminal Modules (task = 250
μ
s)
The SIZER for Siemens Drives engineering tool can be used to
very quickly perform reliability checks on more complex quantity
structures.
Motor output
Slip values
Notes
< 1 kW
6 % of
n
rated
e.g. motor with 1500 rpm: 90 rpm
The slip values of 1PH asynchronous motors
are very similar to those of standard motors
< 10 kW
3 % of
n
rated
e.g. motor with 1500 rpm: 45 rpm
< 30 kW
2 % of
n
rated
e.g. motor with 1500 rpm: 30 rpm
< 100 kW
1 % of
n
rated
e.g. motor with 1500 rpm: 15 rpm
> 500 kW
0.5 % of
n
rated
e.g. motor with 1500 rpm: 7.5 rpm
Dynamic response
(current controller
clock cycle)
Number of axes without
performance expansion
Number of axes with
performance expansion
Note
Servo Control
62.5
μ
s
3
3
3 servo axes are possible with a cycle time
of 62.5
μ
s.
The performance expansion is therefore
ineffective.
From the 4th servo axis, irrespective of the
computing capacity, the expanded
performance is necessary.
125
μ
s
3
6
250
μ
s
3
6
Vector Control
250
μ
s
3
3
For 250
μ
s, 3 vector axes are possible.
This means that the performance expansion
is not active.
From the 4th vector axis, irrespective of the
computing capacity, the expanded
performance is necessary.
500
μ
s
3
6
V/f control
250
μ
s
6
6
For 250
μ
s, 6 V/f axes are possible.
This means that the performance expansion
is not active.
From the 7th V/f axis, irrespective of the
computing capacity, the expanded
performance is necessary.
500
μ
s
6
12
Mixed operation
Servo Control
plus V/f Control
125
μ
s/500
μ
s
3+0; 2+2; 1+4; 0+6
6+0; 5+2; 4+4; 3+6
2+8; 1+10; 0+12
Two V/f axes can be computed instead of a
servo or vector axis.
Vector Control
plus V/f Control
500
μ
s/500
μ
s
3+0; 2+2; 1+4; 0+6
6+0; 5+2; 4+4; 3+6
2+8; 1+10; 0+12
© Siemens AG 2017