YASKAWA CIMR-E7 series Technical Manual

Application Overview 2-11Drive ConfigurationThis section describes the configuration properties used to configure the drive. Refer to the appropriate Technical Manual for additionalinformation.# Accel/Decel Times – nciRampUpTm, nciRampDownTmThese configuration properties define the ramp rates for starting and stopping the motor, configuring the drive as described below:Table 2.6 - Accel/Decel Times – nciRampUpTm, nciRampDownTmProperty Name Variable Type Default Parameter DescriptionnciRampUpTm SNVT_time_sec 10 sec C1-01 Configures motor ramp up time from 0 to its operating setpoint.Sets the driveís output acceleration rate.nciRampDownTm SNVT_time_sec 10 sec C1-02 Configures motor ramp down time from its operating setpoint to0. Sets the driveís output deceleration rate.# PID Configuration – nciPIDSel, nciPID_PGain, nciPID_ITimeThese configuration properties define the mode and gains of the PID controller. The modes selectable by nciPIDSel are described below:Table 2.7 - PID Configuration – nciPIDSel, nciPID_PGain, nciPID_ITimeProperty Name Variable Type Default Parameter DescriptionnciPIDSel SNVT_count 0 b5-01 Selects the mode of the PID controller.nciPID_PGain SNVT_multiplier 2.0 b5-02 Sets the proportional gain of the PID controller.nciPID_ITime SNVT_time_sec 5.0 sec b5-03 Sets the integral time constant of the PID controller.Table 2.8 - PID Configuration – nciPIDSelnciPIDSel PID Mode0 PID Disabled1 PID Enabled (D = Feedback)2 PID Enabled (D = Feed Forward) (Available on F7 and G7 drives only)3 PID Enabled (Freq. Ref + PID Output (D = Feedback))4 PID Enabled (Freq. Ref. + PID Output (D = Feed Forward)) (Available on F7 and G7 drives only)# Stall Prevention – nciStallLevAcc, nciStallLevRunThese points define the stall prevention levels during acceleration and run. Each value is specified as a percentage of the driveís current rating(nciDrvRatedCur). If the output current (nvoDrvCurnt) reaches the specified level during acceleration or run, the output frequency ismaintained or lowered as needed to sufficiently reduce the output current. These properties configure the drive as described below:Table 2.9 - Stall Prevention – nciStallLevAcc, nciStallLevRunProperty Name Variable Type Default Parameter DescriptionnciStallLevAcc SNVT_count * L3-02 Sets the stall level for output current during acceleration.nciStallLevRun SNVT_count * L3-06 Sets the stall level for output current while at set speed.* Value dependent on drive capacity. Refer to appropriate Parameter Access and Technical Manual.