AB Quality ALLEN-BRADLEY 1391-DES, User Manual

Page: 77 / 149

Chapter 8
Start-Up
8-9
34. Clockwise/Counterclockwise Velocity Limits
a) Apply power to the drive.
b) Energize the contactor (M), but Do Not Enable the drive.
c) Access parameters 144 and 145 (Clockwise/Counterclockwise
Velocity Limits) to enter the maximum speed limit of the motor at
maximum velocity command. If the maximum command voltage
exceeds the normal maximum level, these values will limit the
speed of the motor.
d) Perform step 36.
e) Remove power and reconnect all wiring, if applicable.
35. Current Limit Adjustment
a) Apply power to the drive.
b) Energize the contactor (M), but Do Not Enable the drive.
c) Access parameters 156 and 157 (Positive and Negative Current
Limits) to enter the desired positive and negative current limits.
d) Perform step 36.
e) Remove power and reconnect all wiring, if applicable.
36. Saving Current Parameters to EEprom
If this step was just performed, proceed to the System Compensation
Procedure or step 39.
a) Access parameter 128 (EEprom Functions) and select “Save,”
followed by the Enter key. This will load the parameter values
into memory.
If no additional changes are required, press the Up Arrow key and
Enter keys simultaneously to show the Basic Display.
System Compensation Procedure
The auto tune feature of the 1391-DES drive should provide sufficient
system velocity loop compensation for the majority of applications.
Additional tuning is usually not required. However, the following manual
procedure for system velocity loop compensation can be followed, if
desired.
37. Enable the drive and monitor the velocity feedback signal at
terminals 5 (common) and 4 of TB2 with an oscilloscope or chart
recorder. Default scaling is 1.2V/krpm.