Siemens SED2 Commissioning Manual page 84

P1311 Acceleration boost
Applies boost in [%] relative to P0305 (rated motor current) following a positive setpoint
change and drops back out once the setpoint is reached.
Unit: % Min: 0.0
Dependency: Setting in P0640 (motor overload factor [%]) limits boost
Note: Acceleration boost can help to improve response to small positive setpoint changes.
P1312 Starting boost
Applies a constant linear offset (in [%] relative to P0305 (rated motor current)) to active V/f
curve (either linear or quadratic) after an ON command and is active until setpoint is reached
for the first time. This is useful for starting loads with high inertia.
Unit: % Min: 0.0
Details: Setting the starting boost (P1312) too high will cause the VSD to limit the current, which will in turn restrict the output
frequency to below the setpoint frequency.
See note in P1310 for boost priorities.
Dependency: Setting in P0640 (motor overload factor [%]) limits boost.
Note: Increasing the boost levels increases motor heating
Σ Boosts = 300 / l mot * R s
Priorities are allocated to the boost parameters as follows:
P1310 > P1311 > P1312
P1335 Slip compensation
Dynamically adjusts output frequency of the VSD so that motor speed is kept constant
independent of motor load.
Unit: % Min: 0.0
Value: P1335=0%: Slip compensation disabled
P1335=100%: This uses the motor data and motor model to add the rated slip frequency rated motor speed and rated
Note: Gain adjustment enables fine-tuning of the actual motor speed (see P1460 – gain speed control)
100%=standard setting for warm stator.
P1336 Slip limit
Compensation slip limit in [%] relative to r0330 (rated motor slip), which is added to the
frequency setpoint.
Unit: % Min: 0
Dependency: Slip compensation (P1335) active.
r1337 CO: V/f slip frequency
Displays actual compensated motor slip as [%].
Unit: % Min: -
Dependency: Slip compensation (P1335) active.
P1800 Pulse frequency
Sets pulse frequency of power switches in the VSD. The freq. can be changed in steps of 2 kHz
Pulse freq. > 4 kHz selected on 380-480 V units reduce the maximum continuous motor current.
Unit: kHz Min: 4
Dependency: Minimum pulse frequency depends on P1082 (maximum frequency) and P0310 (rated motor frequency)
Note: If silent operation is not absolutely necessary, lower pulse frequencies may be selected to reduce VSD losses and radio-
frequency emissions.
Under certain circumstances, the VSD may reduce the switching frequency to provide protection against over-
temperature (see P0290, Level 4).
r1801 CO: Act. switching frequency
Actual pulse frequency of power switches in the VSD.
Unit: kHz Min: -
Note: Actual pulse frequency of power switches in the VSD. Under certain conditions (VSD overtemperature, see P0290), this
can differ from the values selected in P1800 (pulse frequency).
P1820 Reverse output phase sequence
Changes direction of motor rotation without changing setpoint polarity.
Unit: - Min: 0
Settings: 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
Performs stator resistance measuring
Unit: - Min: 0
Settings: 0=Disabled
1=Identification of all parameters with parameter change
Dependency: No measurement if motor data incorrect.
P1910=1: Calculated value for stator resistance (see P0350) is overwritten
P1910=2: Values already calculated are not overwritten
Note: Before selecting motor data identification, "Quick commissioning" has to be performed in advance.
Once enabled (P1910=1), A0541 generates a warning that the next ON command will initiate measurement of motor
parameters.
When choosing the setting for measurement, observe the following:
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Siemens
Building Technologies
Def: 0.0
Def: 0.0
Def: 0.0
motor current
Def: 250
Def: -
Def: 4
Def: -
Def: 0
Def: 0
Commissioning Guide
10 Parameterization
Max: 250.0
Max: 250.0
Max: 600.0
Max: 600
Max: -
Max: 16
Max: -
Max: 1
Max: 20
2=Identification of all parameters without parameter change
20=Set voltage vector
Level 3
Level 3
Level 3
Level 3
Level 3
Level 2
Level 3
Level 3
Level 3
CM1G5192en
29.07.2010