Rockwell Automation 1397 DC Drive Firmware 2.xx - Manual (Page 109)

4–37 Start–Up and Adjustment
Publication 1397-5.0 — June, 2001
Table 4.K
Application Parameters
Parameter Name Par No. Default Description Final Setting
[Max Process Spd]
S
etup Group
P.042 500 RPM The maximum speed of the drive that can be supported by the application
or process.
[Pos Current Lim]
Adv Setup Group
P.067 150%
FLA Selects the highest amount of current (% motor rated armature amps) for
the forward bridge. This parameter is also a high limit for the speed loop PI
block output.
[Neg Current Lim]
Adv Setup Group
P.068 150%
FLA This parameter is only set for regenerative Drives. For non-regenerative
Drives, it is automatically set to zero and cannot be changed. This input is
also clamped to zero if [Feedback Type] is set to AC Tach or if [Feedback
Type] is set to Pulse Tach and [Encoder Quad] is Off. [Neg Current Lim]
selects the highest amount of current (% motor rated armature amps) for
the reverse bridge.This parameter is also used as a low limit for the Speed
Loop PI block output.
[Pos Current Lim
Src]
Adv Setup Group
P.069 0 This parameter selects the source for the positive current limit. If register
is selected, the reference is [Pos Current Limit]
The speed loop and the current loop may be tuned in one step, or
each loop may be selected and tuned individually.
To execute Autotune make certain the previously lowered parameters
are set to their final value , then perform the following steps:
1. Set [Autotune Type] (P. 052), in the setup memory to the desired
tuning mode. The available selections are: “Current Loop” or
“Speed Loop” or “Current and Spd”.
Note: If tuning the Speed Loop separately, the Current Loop
should have been previously tuned for best results.
2. Press START
Note: Current Loop tunes in approximately 3 to 4 seconds
Speed Loop tunes in approximately 1 minute.
If no faults occur, the Drive stops with tuned values in memory. In
order to save these values the user must perform a memory save in
the EEPROM menu so that these values are not lost if power is
cycled. The Run key is now back to normal operation.
Save Parameters to EEPROM –
IMPORTANT – Upon competition of the auto tune procedure, the
parameters must be written to the non–volatile EEPROM memory, or
they will be lost when power is removed from the Drive.
NOTE: For applications requiring precise speed control, the speed
regulator may require manual tuning to achieve the desired response.
Manual adjustment of KP and KI velocity loops may be necessary in
some applications. Consult the factory for assistance if tuning
KP/KI loops becomes necessary
Autotune Execution