GE Industrial Solutions DV-300 DC Drive Users Manual - Manual (Page 117)

DV-300 Adjustable Speed Drives
——— CONVERTER OPERATION ———
5
41
TO EXECUTE SELF TUNING, enter START UP \ Self tuning menu.
- Start execution by entering “Start”.
The procedure performs an acceleration test at the torque limit value set in Test T curr lim parameter up to a
speed threshold, then a deceleration test with no torque applied (coasting) down to zero speed.
The speed threshold is 33% of the lowest in the following:
- Speed base value
- Speed max pos or Speed max neg according to direction of rotation.
The procedure may take a few minutes, depending on inertia and friction values.
Based on inertia and friction values, the drive will calculate the speed loop gains (Speed P and Speed I pa-
rameters).
If manual adjustment are required (in case of vibrations, etc.) these should be applied to the integral gain Speed
I [%]. In case self-tuning of speed regulator is not satisfactory, refer to manual tuning procedure in section
5.3.6 .
After the completion of the Speed self tune by the Drive, the new identified parameter values (“Nw” suffix) can
be compared with values prior to the procedure, by browsing the subsequent menu entries. Parameters in this
menu are read only. Editing of individual parameters must be done in their specific menus. New parameters can
be accepted all togetheter by entering “Take val” after disabling the Drive. In this case, prior values are overwrit-
ten. “Self tuning” can be repeated, whether values from the previous trial have been accepted or not.
n
ote
! “Take val” does not store values in non-volatile memory, so values are lost if Drive power
is cycled off and on. You need to enter Save parameters in the START UP or SPEC FUN-
CTIONS menu to permanently store values in non-volatile memory.
In case of extreme parameter ranges, error messages can occurr. Repeat execution in this case. If the error mes-
sage is persistent, keep default values and use manual tuning of speed regulator (section 5.3.6 Manual tuning
of the regulators).
List of self tune error messages
Generic messages
Description Note
“Drive disabled”: Provide enable input by setting terminal 12 high.
“Not ready”: “Take val” can not be executed because the measurement has not been completed cor-
rectly. Repeat self tune command.
“Time out”: Measurement has not been completed in the proper time
“Start ?”: Press ENT to confirm start of measurement.
“Tuning aborted”: Measurement aborted by user (CANC button has been pressed).
“Set Main cmd=Dig”: Go to CONFIGURATION menu and set Main commands = digital.
“Set Ctrl=Local”:
Go to CONFIGURATION menu and set Control mode = Local.