ABB ACS 140, Руководство по программированию, Страница: 41 / 70

33
CO
MP
LE
T
E
P
ARAME
T
E
R
S
1103 EXT REF1 SELECT
This parameter selects the signal source of external reference 1.
0 =
KEYPAD
Reference is given from the control panel.
1 = AI 1
Reference is given through analogue input 1.
2 = AI 2
Reference is given through analogue input 2.
3 = AI1/
JOYST
; 4 = AI2/
JOYST
Reference is given through analogue input 1 (or 2 accordingly) configured for a
joystick. The minimum input signal runs the drive at maximum reference in the
reverse direction. The maximum input signal runs the drive at maximum
reference in the forward direction (See Figure 2). See also parameter 1003
DIRECTION
.
Caution: Minimum reference for joystick should be 0.3 V ( 0.6 mA) or higher. If
a 0 ... 10 V signal is used, the ACS 140 will operate at maximum reference in
the reverse direction if the control signal is lost. Set parameter 1301
MINIMUM
AI1 to a value 0.3 V or higher, and parameter 3001
AI
<
MIN FUNCTION
to 1
(
FAULT
), and the ACS 140 will stop in case the control signal is lost.
Figure 2 Joystick control. Maximum for external reference 1 is set with
Parameter 1105 and minimum with Parameter 1104.
5 = DI3U,4D(R)
Speed reference is given through digital inputs as motor potentiometer control.
Digital input DI3 increases the speed (the U stands for “up”), and digital input
DI4 decreases the speed (the D stands for “down”). (R) indicates that the
reference will be reset to zero when a Stop command is given. The rate of
change of the reference signal is controlled by parameter 2204
ACCELER TIME
2.
6 = DI3U,4D
Same as above, except that the speed reference is not reset to zero on a Stop
command. When the ACS 140 is started, the motor will ramp up at the selected
acceleration rate to the stored reference.
7 = DI4U,5D
Same as above, except that the digital inputs in use are DI4 and DI5.
8=
COMM
The reference is given through serial communication.
1104 EXT REF1 MIN
Sets the minimum frequency reference for external reference 1 in Hz. When
analogue input signal is at minimum, external reference 1 equals to
EXT REF
1
MIN
. See Figure 3 on page 34.
1105 EXT REF1 MAX
Sets the maximum frequency reference for external reference 1 in Hz. When
analogue input signal is at maximum, external reference 1 equals to
EXT REF
1
MAX
. See Figure 3 on page 34.
1106 EXT REF2 SELECT
This parameter selects the signal source for external reference 2. The
alternatives are the same as with external reference 1.
EXT REF1 MAX
+2%
-2%
EXT REF1 MIN
-
EXT REF1 MIN
-
EXT REF1 MAX
2V / 4mA
0V / 0mA
EXT REF
- EXT REF
10V / 20mA
Hysteresis 4% of
Full Scale
1 MIN
1 MIN