Parker AC20 Series - Page 94

DOC-0017-04-EN: AC20 Series - Hardware Installation Manual
94 (154) DOC-0017-04-EN-A 22.03.2023
Once ‘Local’ Control Mode is enabled, the drive will show the following status indication:
Local Control Mode ‘Enabled’
Onboard Keypad Display
6901 Remote Keypad Display
No indication displayed.
The ‘SEQ’ & ‘REF’ LEDs will illuminate.
2. ‘Autotune’ Routine (‘Vector Control’ Strategy Only):
If the drive ‘Control Strategy’, has been set to ‘Vector Control’ (either ‘Sensorless’ or ‘Encoder
Feedback’, an ‘Autotune’ routine will need to be performed prior to running the drive. This is required for
the drive to calculate and model the motor parameters (i.e., Magnetising Current, Rotor Time Constant,
Stator Resistance, Mutual & Leakage Inductances) for better speed and torque control. Failure to perform
an ‘Autotune’ routine will result in poor motor control, or most likely spurious drive trips when enabled.
There are two types of ‘Autotune routine:
1. Rotating
2. Stationary
A ‘Rotating’ autotune on an uncoupled motor is always the preferred autotune ‘Type’ whenever possible. If
this is not practical, a ‘Stationary’ routine is possible where the motor shaft will not rotate. However, the result
is usually lower dynamic performance.
To perform an ‘Autotune’ routine:
- Navigate to the ‘Autotune’ sub-menu:
Motor Nameplate Level Menu Overview
Onboard Keypad Display / 6901 Remote Keypad Display
- The ‘Atn Mode’ is set to ‘Rotating’ by default (recommended), but if this is not possible, change it
to ’Stationary’.
- Next, set the ‘Atn Enable’ to ‘TRUE’.
Parameter Name
No.
Default Value
Range
Units
Type
Writable
Atn Mode
0036
1: Rotating
0: Stationary
1: Rotating
ENUM
STOPPED
Atn Enable
0035
0: FALSE
0: FALSE
1: TRUE
BOOL
STOPPED
To start the ‘Autotune’ routine:
- Press the ‘Run’ key:
Local ‘Run’ Enable
Onboard Keypad Display
6901 Remote Keypad Display
Setup
Motor Control
Autotune