Technical data

Appendix A: Parameter Reference List
Siemens Building Technologies, Inc. 117
P1310 Continuous boost
Min: 0.0 Def: 50.0 Max: 250.0
Level 2
Details:
Defines boost level in [%] relative to P0305 (rated motor current) applicable to both linear and quadratic V/f curves.
Dependency:
Setting in P0640 (motor overload factor [%]) limits the boost.
Note:
The boost values are combined when continuous boost (P1310) used in conjunction with other boost parameters
(acceleration boost P1311 and starting boost P1312). However priorities are allocated to these parameters as follows:
P1310 > P1311 > P1312
Increasing the boost levels increases motor heating (especially at standstill).
P1311 Acceleration boost
Min: 0.0 Def: 0.0 Max: 250.0
Level 2
Details:
Applies boost in [%] relative to P0305 (rated motor current) following a positive setpoint change and drops back out once
the setpoint is reached.
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
Min: 0.0 Def: 0.0 Max: 250.0
Level 2
Details:
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.
Setting the starting boost (P1312) too high will cause the inverter to limit the current, which will in turn restrict the output
frequency to below the setpoint frequency.
Dependency:
Setting in P0640 (motor overload factor [%]) limits boost.
Note:
Increasing the boost levels increases motor heating.
Boosts 300/l
mot
* R
s
Priorities are allocated to the boost parameters as follows:
P1310 > P1311 > P1312
P1335 Slip compensation
Min: 0.0 Def: 0.0 Max: 600.0
Level 2
Details:
Dynamically adjusts output frequency of inverter so that motor speed is kept constant independent of motor load.
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
motor current.
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
Min: 0 Def: 250 Max: 600
Level 2
Details:
Compensation slip limit in [%] relative to r0330 (rated motor slip), which is added to frequency setpoint.
Dependency:
Slip compensation (P1335) active.
r1337 CO: V/f slip frequency
Min: - Def: - Max: -
Level 3
Details:
Displays actual compensated motor slip as [%].
Dependency:
Slip compensation (P1335) active.
P1499 Scaling accel. torque control
Min: 0.0 Def: 100.0 Max: 400.0
Level 3
Details:
Enters scaling of acceleration in [%] for sensorless torque control (SLVC) at low frequencies.
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).