CHA NGE PARA METERS 103
6.8.6 CURRENT C ON TROL / Upper current clamp PIN 89
The product of this parameter and 81)CUR CLA MP SC ALER sets the limit.
If the upper clamp is set negative and the lower clamp set positive than the result is 0.00%.
If the lower clamp is more + ve than the upper in the + ve region, the upper behaves as a current demand.
6.8.7 CURRENT C ON TROL / Lower current clamp PIN 90
The product of this parameter and 81)CUR CLA MP SC ALER sets the limit.
If the upper clamp is set negative and the lower clamp set positive than the result is 0.00%.
If the upper clamp is more -ve than the lo wer in the -ve region, the lo wer behaves as a current demand.
6.8.8 CURRENT C ON TROL / Extra current reference PIN 91
6.8.9 CURRENT C ONTROL / Autotune enable PIN 92
If you change your supply voltage, current calibration or motor type then AUTOTUNE must be repeated.
This is a stationary test. There is no need to disconnect the motor from the load. The motor field is
automatically disabled. If the motor rotates above 20 % speed due to residual magnetism, the test is aborted.
See 8.1.11.16 DRIVE TRIP MESSAGE / Cannot autotune, 8.1.11.17 DRIVE TRIP MESSAGE / Autotune quit.
Note. The autotune function makes a one off adjustment to the current loop error amplifier terms to achieve
optimum performance. When EN ABLED it will wait until the main contactor is energised and the drive run
before starting its autotune routine. It may take from a few seconds up to about 1 minute typicall y.
Warning. If the maximum motor armature current rating is less than approximately 50 % of the maximum
model rating, the AUT OT UNE results may not be optimum. There are 2 possible w ays of overcoming this.
Either 1) Set the current loop control terms manually. See 6.8.12 CURRENT CONTROL / Discontinuous
current point PIN 95.
CURRENT C ON TROL 3
89)UPPER CUR CLA MP
89)UPPER CUR CLA MP
+ 100.00 %
PARA METER RANGE DEF AULT PIN
UPPER CUR CLA MP + /-100.00 % + 100.00 % 89
Modifies the upper current limit
%.
CURRENT C ON TROL 3
90)LO WER CUR CLA MP
90)LO WER CUR CLA MP
-100.00%
PARA METER RANGE DEF AULT PIN
LOWER CUR CLA MP + /-100.00% -100.00% 90
Modifies the lower current limit
%.
CURRENT C ON TROL 3
91)EX TRA C UR REF
91)EX TRA C UR REF
0.00 %
PARA METER RANGE DEF AULT PIN
EX TRA CUR REF + /-300.00 % 0.00% 91
Sets the value of an extra
current reference input.
CURRENT C ON TROL 3
92)AUTO TUNE EN ABLE
92)AUTO TUNE EN ABLE
DIS ABLED
PARA METER RANGE DEF AULT PIN
AUTOTUNE EN ABLE EN ABLED OR DIS ABLED DISABLED 9 2
Enables the autotune function
to start. It turns itself off.
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