5.4 d: Reference Settings210 YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual d5-04: Speed LimitSets the speed limit during torque control if parameter d5-03 is set to 2. Refer to Speed Limitation and Speed Limit Biason page 208. d5-05: Speed Limit BiasUsing d5-05 a bias can be applied to the speed limit value. The bias is set as a percentage of the maximum outputfrequency. Refer to Speed Limitation and Speed Limit Bias on page 208. d5-06: Speed/Torque Control Switchover TimeSets the delay time for switching from Speed Control to Torque Control and vice versa. d5-08: Unidirectional Speed Limit BiasParameter d5-08 selects how the speed limit bias is applied.Setting 0: DisabledThe speed limit bias is applied in both directions, the speed limit and the opposite direction.Setting 1: EnabledThe speed limit bias is applied in the opposite direction of the speed limit only. d6: Field Weakening and Field ForcingField WeakeningThe Field Weakening function reduces the output voltage to a pre-defined level in order to reduce the energyconsumption of the motor. It can be activated using a digital input programmed for H1- = 63. Field Weakeningshould only be used with a known and unchanging light load condition. Use the Energy Saving function (b8-parameters) when Energy Saving for various different load conditions is required.Field ForcingThe Field Forcing function compensates the delaying influence of the motor time constant when changing the excitationcurrent reference. Field Forcing can improve the motor responsiveness. It is ineffective during DC Injection Braking. d6-01: Field Weakening LevelSets the level to what the output voltage is reduced when Field Weakening is activated. Set as percentage of the drivemaximum output voltage. d6-02: Field Weakening Frequency LimitSets the minimum output frequency for that field weakening can be activated. For frequencies below d6-02, FieldWeakening cannot be activated.No. Parameter Name Setting Range Defaultd5-04 Speed Limit -120 to 120% 0%No. Parameter Name Setting Range Defaultd5-05 Speed Limit Bias 0 to 120% 10%No. Parameter Name Setting Range Defaultd5-06 Speed/Torque Control Switchover Time 0 to 1000 ms 0 msNo. Parameter Name Setting Range Defaultd5-08 Unidirectional Speed Limit Bias 0 or 1 1No. Parameter Name Setting Range Defaultd6-01 Field Weakening Level 0 to 100% 80%No. Parameter Name Setting Range Defaultd6-02 Field Weakening Frequency Limit 0 to 400.0 Hz 0.0 Hz
