To Next Page

To Previous Page

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.

YASKAWA CIMR-E7 series User Manual

Questions and Answers: