ABB ACS150 - Page 10

Update notice
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DI3U,4D(NC) Digital input DI3: Reference increase. Digital input DI4: Reference decrease.
The program stores the active reference (not reset by a stop command).
When this selection becomes active (in change from EXT1 to EXT2), the
reference initializes to the value used when this control location (and this
selection) was active the last time.
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AI1+POT Reference is calculated with the following equation:
REF = AI1(%) + POT(%) - 50%
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AI1*POT Reference is calculated with the following equation:
REF = AI(%) · (POT(%) / 50%)
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AI1-POT Reference is calculated with the following equation:
REF = AI1(%) + 50% - POT(%)
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AI1/POT Reference is calculated with the following equation:
REF = AI1(%) · (50% / POT (%))
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INTERNAL A constant value defined by parameter 4011 INTERNAL SETPNT 19
DI4U,5D(NC) See selection DI3U,4D(NC). 31
FREQ INPUT Frequency input 32
4011 INTERNAL SETPNT Selects a constant value as process PID controller reference, when
parameter 4010 SET POINT SEL value is set to 19 (INTERNAL).
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x…x Unit and range depend on the unit and scale defined by parameters 4006
UNITS and 4007 UNIT SCALE.
4012 SETPOINT MIN Defines the minimum value for the selected PID reference signal source. See
parameter 4010 SET POINT SEL
0.0%
-500.0…500.0% Value in percent.
Example: Analog input AI1 is selected as the PID reference source (value of
parameter 4010 is 1 = AI1). The reference minimum and maximum
correspond to the 1301 MINIMUM AI1 and 1302 MAXIMUM AI1 settings as
follows:
4013 SETPOINT MAX Defines the maximum value for the selected PID reference signal source.
See parameters 4010 SET POINT SEL and 4012 SETPOINT MIN.
100.0%
-500.0…500.0% Value in percent
4014 FBK SEL Selects the process actual value (feedback signal) for the process PID
controller: The sources for the variables ACT1 and ACT2 are further defined
by parameters 4016 ACT1 INPUT and 4017 ACT2 INPUT.
1 = ACT1
ACT1 ACT1 1
ACT1-ACT2 Subtraction of ACT1 and ACT 2 2
ACT1+ACT2 Addition of ACT1 and ACT2 3
ACT1*ACT2 Multiplication of ACT1 and ACT2 4
ACT1/ACT2 Division of ACT1 and ACT2 5
Parameters
Index Name/Selection Description Def
Ref
4013
4012
1301
1302
AI1 (%)
1301
1302
Ref
(MAX)
(MIN)
4013
4012
(MAX)
(MIN)
AI1 (%)
MAX > MIN MIN > MAX