Siemens G130 List Manual page 459

p1800[0...n] Pulse frequency setpoint / Pulse freq setp
VECTOR_G Can be changed: U, T
Data type: FloatingPoint32
P-Group: Modulation
Not for motor type: -
Min
1.000 [kHz]
Description: Sets the pulse frequency for the converter.
This parameter is pre-set to the rated converter value when the drive is first commissioned.
Dependency: The pulse frequency can, depending on the current controller sampling time (p0115[0]) assume the following values:
p1800 = 1000 / (p0115[0] * 2)
or
p1800 = n * 1000 / p0115[0] with n = 1, 2, 3, ...
Example:
p0115[0] = 250 µs --> p1800 = 2, 4, 8, 12, 16 kHz
Possible setting values can be taken from r0114 (if p0009 = p0010 = 0).
If p0092 = 1 the sampling times p0115 and the pulse frequency p1800 are checked every time the parameters are
downloaded, and reset to the initial values if necessary. This check can be deactivated by setting p0092 = 0 (making
this setting does not affect isochronous PROFIBUS operation).
The pulse frequency cannot be changed when motor data identification is active (p1910).
If the pulse frequency is set asynchronously to the current controller sampling time (p1810.12), the following limit
applies:
p1800 <= 1000 * 2 / p0115[0]
If wobbulation is selected (p1810.2), the pulse frequency can only be changed as part of pulse enabling to values
with the following ratio:
a) p1800 <= 1000 / p0115[0] for p1811 > 0 %
b) p1800 <= 1000 * 2 / p0115[0] for p 1811 = 0 %
Under pulse inhibit
p1800 > 1000 / p0115[0] -> p1811 = 0
p1800 > 1000 * 2 / p0115[0] -> 1810.2 = 0 and p1811 = 0
(applicable for all indices)
Refer to: r0110, r0111, p0112, p0113, r0114, p0115, p0230, p1817
Notice: The pulse frequency p1800 can also be asynchronously set to the current controller sampling time (0.05 kHz
increment). To do this, p1810.12 must be set to 1 (secondary condition, see p1810).
Effects:
- switching over the gating unit (p1810.2).
- activating the current actual value correction (p1840.0).
- minimum pulse frequency 1000 * 0.5 / p0115[0].
- maximum pulse frequency 1000 * 2 / p0115[0].
- fluctuating deadtimes and dynamic performance in the current control loop.
- increased level of current ripple in the current display.
Note: The maximum possible pulse frequency is also determined by the power unit being used.
When the pulse frequency is increased, depending on the particular power unit, the maximum output current can be
reduced (derating, refer to r0067).
The maximum pulse frequency for operation with output reactors (see p0230) is 4 kHz for booksize and blocksize
power units, for chassis power units it is twice the rated pulse frequency (2.5 kHz or 4 kHz).
If a sine-wave filter is parameterized as output filter (p0230 = 3), then the pulse frequency cannot be set below the
minimum value required for the filter. If an external sine-wave filter is parameterized, (p0230 = 4), then the minimum
pulse frequency is calculated as follows:
f_puls_min = 1.6 / ( 2 * Pi * root(p0233 * p0234 * p0235) ), with p0233 in H and p0234 in F
In this case, the pulse frequency must be a multiple of the inverse value of the current controller sampling time
(p0115[0]).
If a sine-wave filter is parameterized as output filter (p0230 = 3), then the pulse frequency cannot be changed below
the minimum value required for the filter.
SINAMICS G130/G150
List Manual (LH2), 07/2016, A5E03263479A
Calculated: -
Dyn. index: DDS, p0180
Unit group: -
Scaling: -
Max
16.000 [kHz]
2 Parameters
2.2 List of parameters
Access level: 2
Func. diagram: 8021
Unit selection: -
Expert list: 1
Factory setting
4.000 [kHz]
459