Operating Instructions

Appendix A: Parameter Reference List
Siemens Building Technologies, Inc. 155
P1800 Pulse frequency
Min: 2 Def: 4 Max: 16
Level 2
Details: Sets pulse frequency of power switches in inverter. The frequency can be changed in steps of 2 kHz.
Pulse frequencies > 4 kHz selected on 380 to 480V units reduce the maximum continuous motor current.
Dependency: Minimum pulse frequency depends on P1082 (maximum frequency) and P0310 (rated motor frequency).
Note: At 4 kHz, full output current is obtained up to 50 degrees C (CT mode);
over 50 degrees Celsius, full output may be obtained at 8 kHz.
If silent operation is not absolutely necessary, lower pulse frequencies may be selected to reduce inverter losses
and radio-frequency emissions.
Under certain circumstances, the inverter may reduce the switching frequency to provide protection against over-
temperature (see P0290, Level 3).
r1801 CO: Act. switching frequency
Min: - Def: - Max: -
Level 3
Note: Actual pulse frequency of power switches in inverter. Under certain conditions (inverter overtemperature, see
P0290), this can differ from the values selected in P1800 (pulse frequency).
P1820 Reverse output phase sequence
Min: 0 Def: 0 Max: 1
Level 2
Enum: 0=OFF
1=ON
Dependency: If positive and negative revolution is enabled, frequency setpoint is directly used.
If both positive and negative revolution are disabled, reference value is set to zero.
Details: See P1000 (select frequency setpoint).
P1910 Select motor data identification
Min: 0 Def: 0 Max: 20
Level 2
Settings: P1910=1: All motor data
* P0350 stator resistance,
* P0354 rotor resistance,
* P0356 stator leakage reactance,
* P0358 rotor leakage reactance,
* P0360 main reactance
will be identified and parameter will be changed.
P1910=3: Saturation curve
* P0362 ... P0365 magnetizing curve flux 1 .. 4
* P0366 ... P0369 magnetizing curve imag 1 .. 4
will be identified and parameter will be changed.