Table 4-5 Inverter Control Board Level 2 Parameter Definitions - Continued

Block Title

Parameter

Description

 

 

 

AUTO TUNING

 

The Auto Tune procedure is used to automatically measure and calculate certain

 

 

parameter values. Dynamic Brake Hardware is required to perform “Slip Freq Test”

 

 

and “Spd Cntrlr Calc” autotuning test. Occasionally, the Auto Tune procedure cannot

 

 

be run due to various circumstances such as the load cannot be uncoupled from the

 

 

motor. The control can be manually tuned by entering the parameter values based on

 

 

calculations you have made. Refer to “Manually Tuning the Control” in the

 

 

Troubleshooting section of this manual.

 

CALC Presets

Loads operating values into memory. These values are based on information

 

 

programmed into the Level 2 Output Limits and Motor Data parameter values.

 

 

CALC Presets must be run before Autotuning or manually tuning the drive.

 

CMD Offset Trim

This procedure trims out voltage offsets for the differential analog input at J1-4 and J1-5.

 

CUR Loop COMP

Measures current response to pulses of one half the rated motor current.

 

Flux CUR Setting

Sets motor magnetizing current by running motor at near rated speed.

 

Feedback Tests

Checks the values for Encoder Lines per revolution and encoder alignment parameters

 

 

while the motor is running at near full rated speed. Test will automatically switch

 

 

encoder phasing to match motor rotational direction.

 

Slip FREQ Test

Calculates motor Slip Frequency during repeated motor accelerations.

 

SPD CNTRLR

Should be performed with the load coupled to the motor shaft. Sets the motor current to

 

CALC

acceleration ratio, Speed INT gain and Speed PROP gain values. If done under no

 

 

load, the Integral gain will be too large for high inertia loads if the PK Current Limit is

 

 

set too low. If the control is too responsive when the drive is loaded, adjust the PK

 

 

Current Limit parameter to a greater value and repeat this test.

 

 

 

LEVEL 1 BLOCK

 

ENTERS LEVEL 1 MENU

 

 

 

4-22 Programming & Operation

MN722

Page 69
Image 69
Baldor mn722 manual Auto Tuning, SPD Cntrlr, Calc, Level 1 Block Enters Level 1 Menu