ABB ACS320 series, Руководство пользователя

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168 Actual signals and parameters
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Group 12: Constant speeds
This group defines a set of constant speeds. In general:
• You can program up to 7 constant speeds, ranging from 0 … 500 Hz.
• Values must be positive (No negative speed values for constant speeds).
• Constant speed selections are ignored if:
- the torque control is active, or
- the process PID reference is followed, or
- the drive is in local control mode, or
- PFA (Pump and fan alternation) is active
Note: Parameter 1208 CONST SPEED 7 acts also as a so-called fault speed which
may be activated if the control signal is lost. For example, see parameters 3001
AI<MIN FUNCTION , 3002 PANEL COMM ERR and 3018 COMM FAULT FUNC .
1107
REF2 MIN
0.0 … 100.0%
(torque: 0 … 600%)
0.1% 0.0%
Sets the minimum for external reference 2.
• The minimum analog input signal (in volts or amps) corresponds to REF2 MIN in %.
• Parameter
1301 MINIMUM AI1 or 1304 MINIMUM AI2 sets the minimum analog
input signal.
• This parameter sets the minimum frequency reference.
• The value is a percentage of the:
• maximum frequency or speed
• maximum process reference
• nominal torque.
1108 REF2 MAX 0.0 … 100.0%
(torque: 0 … 600%)
0.1% 100.0%
Sets the maximum for external reference 2.
• The maximum analog input signal (in volts or amps) corresponds to REF2 MAX in
%.
• Parameter 1302 MAXIMUM AI1 or 1305 MAXIMUM AI2 sets the maximum analog
input signal.
• This parameter sets the maximum frequency reference.
• The value is a percentage of the:
• maximum frequency or speed
• maximum process reference
• nominal torque
Group 11: Reference select
Code Description Range Resolution Default S