Chapter 6 – Parameters
6-22
ACH 500 Programming Manual
6 DECEL TIME 2
Refer to Parameter 20.3.4.
7 ACCEL REF2 TIME
Corresponds to the time required for the reference to change from 0 to 100
percent and vice versa, if the PI-Controller is not used.
8 DECEL REF2 TIME
Refer to Parameter 20.3.7.
Group 20.4
Motor Control
These parameter values can only be altered with the ACH 500 stopped, except
those marked with (I). The Range/Unit column in Table 6-13 shows parameter
values. The text following the table explains parameter values in detail.
Table 6-13 Group 20.4
Parameter
Range/Unit
Description
1 SWITCHING FREQ
1.0 – 12.0 kHz
(ACH 501)
3.0 kHz (ACH 502)
Carrier frequency selection.
2 MAX OUT VOLTAGE
0.15 – 1.05 times
drive output
voltage
Maximum motor voltage selection.
3 V/Hz RATIO
LINEAR/
SQUARED/
AUTOMATIC
Voltage to frequency relationship in
region below Field Weakening Point.
4 FIELD WEAK POINT
30 – 500 Hz
Threshold for nominal voltage.
5 IR COMPENSATION
NO/MANUAL/
AUTOMATIC
Low speed torque boost function.
6 IR COMP VOLTAGE
0.01 – 0.15 times
drive output
voltage
Voltage level in manual IR
Compensation.
7 IR COMP RANGE
0 Hz – FWP
Zero point in manual IR
Compensation.
8 SLIP
COMPENSATION (I)
OFF/ON
Automatic slip reduction.
9 NOMINAL SLIP (I)
0.1 – 10%
Nominal slip of the motor.
10 VOLTAGE LIMIT (I)
OFF/ON
Over-/Undervoltage Controller.