ACS550 User’s Manual 75
Start-Up
Group 11: Reference Select
This group defines:
• How the drive selects between command sources.
• Characteristics and sources for REF1 and REF2.
Code Description
1101 KEYPAD REF SEL
Selects the reference controlled in local control mode.
1 = REF1 (Hz/rpm) – Reference type depends on parameter 9904 MOTOR CTRL MODE.
• Speed reference (rpm) if 9904 = 1 (VECTOR: SPEED) or 2 (VECTOR: TORQ).
• Frequency reference (Hz) if 9904 = 3 (SCALAR: SPEED).
2 = REF2 (%)
1102 EXT1/EXT2 SEL
Defines the source for selecting between the two external control locations EXT1 or EXT2. Thus, defines the source for
Start/Stop/Direction commands and reference signals.
0 = EXT1 – Selects external control location 1 (EXT1).
• See parameter 1001 EXT1 COMMANDS for EXT1’s Start/Stop/Dir definitions.
• See parameter 1103 REF1 SELECT for EXT1’s reference definitions.
1 = DI1 – Assigns control to EXT1 or EXT2 based on the state of DI1 (DI1 activated = EXT2; DI1 de-activated = EXT1).
2…6 = DI2…DI6 – Assigns control to EXT1 or EXT2 based on the state of the selected digital input. See DI1 above.
7 = EXT2 – Selects external control location 2 (EXT2).
• See parameter 1002 EXT2 COMMANDS for EXT2’s Start/Stop/Dir definitions.
• See parameter 1106 REF2 SELECT for EXT2’s reference definitions.
8 = COMM – Assigns control of the drive via external control location EXT1 or EXT2 based on the fieldbus control word.
• Bit 5 of the Command Word 1 (parameter 0301) defines the active external control location (EXT1 or EXT2).
• See Fieldbus user’s manual for detailed instructions.
9 = TIMER FUNCTION 1 – Assigns control to EXT1 or EXT2 based on the state of the Timer Function (Timer Function
activated =
EXT2; Timer Function de-activated = EXT1). See Group 36, Timer Functions.
10…12 = TIMER FUNCTION 2…4 – Assigns control to EXT1 or EXT2 based on the state of the Timer Function. See
Timer Function 1 above.
-1 = DI1(INV) – Assigns control to EXT1 or EXT2 based on the state of DI1 (DI1 activated = EXT1; DI1 de-activated =
EXT2).
-2…-6 = DI2(INV)…DI6(INV) – Assigns control to EXT1 or EXT2 based on the state of the selected digital input. See
DI1(INV) above.
1103 REF1 SELECT
Selects the signal source for external reference REF1.
0 = KEYPAD – Defines the control panel as the reference
source.
1 = AI1 – Defines analog input 1 (AI1) as the reference
source.
2 = AI2 – Defines analog input 2 (AI2) as the reference
source.
3 = AI1/JOYST – Defines analog input 1 (AI1), configured for
joystick operation, as the reference source.
• The minimum input signal runs the drive at the maximum
reference in the reverse direction. Define the minimum
using parameter 1104.
• The maximum input signal runs the drive at maximum
reference in the forward direction. Define the maximum
using parameter 1105.
• Requires parameter 1003=3 (REQUEST).
Warning! Because the low end of the reference range
commands full reverse operation, do not use 0 V as the lower end of the reference range. Doing so means
that if the control signal is lost (which is a 0 V input) the result is full reverse operation. Instead, use the
following set-up so that loss of the analog input triggers a fault, stopping the drive:
• Set parameter 1301 MINIMUM AI1 (1304 MINIMUM AI2) at 20% (2 V or 4 mA).
• Set parameter 3021 AI1 FAULT LIMIT to a value 5% or higher.
• Set parameter 3001 AI<MIN FUNCTION to 1 (FAULT).
4 = AI2/JOYST – Defines analog input 2 (AI2), configured for joystick operation, as the reference source.
• See above (AI1/JOYST) description.
+2 %-2 %
10 V /
Hysteresis 4 % of Full Scale
EXT REF 1 MIN
- EXT REF 1 MIN
- EXT REF 1 MAX
EXT
REF 1 MIN
EXT REF 1 MAX
- EXT REF 1 MIN
2V / 4mA
0V / 0mA
20 mA
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