Yaskawa LonWorks Option Card CM048 - Manual (Page 29)

Application Overview 2-11
Drive Configuration
This section describes the configuration properties used to configure the drive. Refer to the appropriate Technical Manual for additional
information.
‹ Accel/Decel Times – nciRampUpTm, nciRampDownTm
These 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, nciRampDownTm
Property Name Variable Type Default Parameter Description
nciRampUpTm SNVT_time_sec 10 sec C1-01
Configures motor ramp up time from 0 to its operating setpoint.
Sets the drive’s output acceleration rate.
nciRampDownTm SNVT_time_sec 10 sec C1-02
Configures motor ramp down time from its operating setpoint to
0. Sets the drive’s output deceleration rate.
‹ PID Configuration – nciPIDSel, nciPID_PGain, nciPID_ITime
These 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_ITime
Property Name Variable Type Default Parameter Description
nciPIDSel 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 – nciPIDSel
nciPIDSel PID Mode
0 PID Disabled
1 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, nciStallLevRun
These points define the stall prevention levels during acceleration and run. Each value is specified as a percentage of the drive’s current rating
(nciDrvRatedCur). If the output current (nvoDrvCurnt) reaches the specified level during acceleration or run, the output frequency is
maintained or lowered as needed to sufficiently reduce the output current. These properties configure the drive as described below:
Table 2.9 - Stall Prevention – nciStallLevAcc, nciStallLevRun
Property Name Variable Type Default Parameter Description
nciStallLevAcc 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.