ABB ACS355 - Page 265

Actual signals and parameters 265
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). The reference is
not saved if the control source is changed from EXT1 to
EXT2, from EXT2 to EXT1 or from LOC to REM.
12
AI1+AI2 Reference is calculated with the following equation:
REF = AI1(%) + AI2(%) - 50%
14
AI1*AI2 Reference is calculated with the following equation:
REF = AI1(%) · (AI2(%) / 50%)
15
AI1-AI2 Reference is calculated with the following equation:
REF = AI1(%) + 50% - AI2(%)
16
AI1/AI2 Reference is calculated with the following equation:
REF = AI1(%) · (50% / AI2 (%))
17
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
SEQ PROG
OUT
Sequence programming output. See parameter group 84
SEQUENCE PROG.
33
4011 INTERNAL
SETPNT
Selects a constant value as process PID controller
reference, when parameter 4010 SET POINT SEL value is
set to INTERNAL.
40
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 AI1). The reference
minimum and maximum correspond to the 1301 MINIMUM
AI1 and 1302 MAXIMUM AI1 settings as follows:
1 = 0.1%
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 1 = 0.1%
All parameters
No. Name/Value Description Def/FbEq
4013
(MAX)
4012
(MIN)
1301 1302
1301 1302
AI1 (%)
Ref
Ref
AI1 (%)
4012
(MIN)
4013
(MAX)
MAX > MIN MIN > MAX