PM230 PM240
Access level: 3 Calculated: - Data type: FloatingPoint32 Can be changed: - Scaling: p2000 Data set:
-Units group: 3_1 Unit selection: p0505
Min Max Factory setting
- [rpm] - [rpm] - [rpm]
Description: Sets the open and closed-loop control mode of a drive.
Value: 0: U/f control with linear characteristic
1: U/f control with linear characteristic and FCC 2: U/f control with parabolic characteristic 3: U/f control with parameterizable characteristic 4: U/f control with linear characteristic and ECO
5: U/f control for drives requiring a precise freq. (e.g. textiles) 6: U/f control for drives requiring a precise frequency and FCC 7: U/f control for a parabolic characteristic and ECO
19: U/f control with independent voltage setpoint 20: Speed control (encoderless)
22: Torque control (encoderless)
Dependency: Only operation with U/f characteristic is possible if the rated motor speed is not entered (p0311).
Operation with a U/f characteristic is not supported for 1LE4 synchronous motors.
Refer to: p0300, p0311, p0500, p1501
Notice: Active slip compensation is required in the U/f control types with Eco mode (p1300 = 4, 7). The scaling of the slip compensation (p1335) should be set so that the slip is completely compensated (generally 100%).
The Eco mode is only effective in steady-state operation and when the ramp-function generator is not bypassed. In the case of analog setpoints, if required the tolerance for ramp-up and ramp-down should be actively increased for the ramp-function generator using p1148 in order to reliably signal a steady-state condition.
Note: Only by selecting closed-loop speed control (p1300 = 20) is it possible to change over in operation to closed-loop torque control (p1501). At the changeover, the setting of p1300 does not change. In this case, the actual state is displayed in r1407, bit 2 and bit 3.
For the open-loop control modes p1300 = 5 and 6 (textile sector), slip compensation p1335, resonance damping p1338, and the Imax frequency controller are switched off internally so that the output frequency can be set pre-cisely. The Imax voltage controller remains active.
During operation (the pulses enabled) the open-loop/closed-loop control mode cannot be changed by changing over drive data sets.
p1300[0...n] Open-loop/closed-loop control operating mode / Op/cl-lp ctrl_mode
PM230 Access level: 2 Calculated: - Data type: Integer16
Can be changed: C(1), T Scaling: - Data set: DDS, p0180 Units group: - Unit selection:
-Min Max Factory setting
0 22 2
Description: Sets the open and closed-loop control mode of a drive.
Value: 0: U/f control with linear characteristic
1: U/f control with linear characteristic and FCC 2: U/f control with parabolic characteristic 3: U/f control with parameterizable characteristic 4: U/f control with linear characteristic and ECO
5: U/f control for drives requiring a precise freq. (e.g. textiles) 6: U/f control for drives requiring a precise frequency and FCC 7: U/f control for a parabolic characteristic and ECO
19: U/f control with independent voltage setpoint 20: Speed control (encoderless)
22: Torque control (encoderless)
Dependency: Only operation with U/f characteristic is possible if the rated motor speed is not entered (p0311).
Operation with a U/f characteristic is not supported for 1LE4 synchronous motors.
Refer to: p0300, p0311, p0500, p1501
Notice: Active slip compensation is required in the U/f control types with Eco mode (p1300 = 4, 7). The scaling of the slip compensation (p1335) should be set so that the slip is completely compensated (generally 100%).
The Eco mode is only effective in steady-state operation and when the ramp-function generator is not bypassed. In the case of analog setpoints, if required the tolerance for ramp-up and ramp-down should be actively increased for the ramp-function generator using p1148 in order to reliably signal a steady-state condition.
Note: Only by selecting closed-loop speed control (p1300 = 20) is it possible to change over in operation to closed-loop torque control (p1501). At the changeover, the setting of p1300 does not change. In this case, the actual state is displayed in r1407, bit 2 and bit 3.
For the open-loop control modes p1300 = 5 and 6 (textile sector), slip compensation p1335, resonance damping p1338, and the Imax frequency controller are switched off internally so that the output frequency can be set pre-cisely. The Imax voltage controller remains active.
During operation (the pulses enabled) the open-loop/closed-loop control mode cannot be changed by changing over drive data sets.
p1300[0...n] Open-loop/closed-loop control operating mode / Op/cl-lp ctrl_mode
PM240 PM250, PM260
Access level: 2 Calculated: - Data type: Integer16 Can be changed: C(1), T Scaling: - Data set: DDS, p0180 Units group: - Unit selection:
-Min Max Factory setting
0 22 0
Description: Defines the voltage boost as a [%] referred to the rated motor current (p0305).
The magnitude of the permanent voltage boost is reduced with increasing frequency so that at the rated motor fre-quency, the rated motor voltage is present.
The magnitude of the boost in Volt at a frequency of zero is defined as follows:
Voltage boost [V] = 1.732 x p0305 (rated motor current [A]) x r0395 (stator/primary section resistance [ohm]) x p1310 (permanent voltage boost [%]) / 100 %
At low output frequencies, there is only a low output voltage in order to maintain the motor flux. However, the output voltage can be too low in order to achieve the following:
- magnetize the induction motor.
- hold the load.
- compensate for losses in the system.
This is the reason that the output voltage can be increased using p1310.
The voltage boost can be used for both linear as well as square-law U/f characteristics.
Dependency: The current limit p0640 limits the boost.
For vector control, the permanent voltage boost (p1310) has no effect as the drive converter automatically sets the optimum operating conditions.
Refer to: p1300, p1311, p1312, r1315
Notice: The voltage boost increases the motor temperature (particularly at zero speed).
Note: The voltage boost is only effective for U/f control (p1300).
The boost values are combined with one another if the permanent voltage boost (p1310) is used in conjunction with other boost parameters (acceleration boost (p1311), voltage boost for starting (p1312)).
However, these parameters are assigned the following priorities: p1310 > p1311, p1312
Description: p1311 only results in a voltage boost when accelerating and generates a supplementary torque to accelerate the load.
The voltage boost becomes effective for a positive setpoint increase and disappears as soon as the setpoint has been reached. The build-up and withdrawal of the voltage boost are smoothed.
The magnitude of the boost in Volt at a frequency of zero is defined as follows:
Voltage boost [V] = 1.732 * p0305 (rated motor current [A]) x r0395 (stator/primary section resistance [ohm]) x p1311 (voltage boost when accelerating [%]) / 100 %
Dependency: The current limit p0640 limits the boost.
Refer to: p1300, p1310, p1312, r1315
Notice: The voltage boost results in a higher motor temperature increase.
Note: The voltage boost when accelerating can improve the response to small, positive setpoint changes.
Assigning priorities for the voltage boosts: refer to p1310