D-24 Programming
DC590+ DRV Series DC Digital Drive
AUTOTUNE
The Autotune feature is used to correctly set up the current loop controller parameters
for the motor load.
The process consists of the drive generating a series of current pulses in the armature in order to
determine:
1. The optimal proportional term and integral terms gains in the current controller, and
storing these values as PROP. GAIN and INT. GAIN.
2. The average value at which the normal running pulses would just join up (stop being discontinuous), and storing this value as the
DISCONTINUOUS parameter.
The Autotune is by default performed with the motor field off, and so the final proportional term gain is reduced by 30% to allow for some armature
inductance fall-off when the field is re-applied.
Refer to Chapter 4: Performance Adjustment for details of how to perform an Autotune.
AUTOTUNE
Parameter Tag Range
AUTOTUNE 18 OFF / ARMATURE / FIELD
Turns the AUTOTUNE procedure on, and selects if field or armature tuning is required. Refer to Chapter 4: Performance Adjustment.
STATE 1226 See below
Indicates the current operating state of the Autotune function block. The FAILED state indicates failure or abort of the Autotune process (for causes
refer to Chapter 4: Performance Adjustment).
0 : IDLE
1 : RUNNING
2 : SUCCESS
3 : FAILED
METHOD 609 See below
Controls the method of operation of the Autotune process.
• The default method 4QMULTI uses both thyristor bridges to generate balanced forward and reverse armature current
pulses.
• The 2QMULTI method only uses the forward thyristor bridge.
Note that the 2Q MULTI method is always used on a 2Q drive (591) irrespective of the setting of this parameter.
0 : 4Q MULTI
1 : 2Q MULTI
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