ABB ACS350 Series, User Manual

Page: 216 / 314

Actual signals and parameters
216
4008 0% VALUE Defines together with parameter 4009 100% VALUE the scaling applied to
the PID controller’s actual values.
0
x…x Unit and range depend on the unit and scale defined by parameters 4006
UNITS and 4007 UNIT SCALE.
4009 100% VALUE Defines together with parameter 4008 0% VALUE the scaling applied to the
PID controller’s actual values.
100
x...x Unit and range depend on the unit and scale defined by parameters 4006
UNITS and 4007 UNIT SCALE.
4010 SET POINT SEL Selects the source for the process PID controller reference signal. AI1
KEYPAD Control panel 0
AI1 Analog input AI1 1
AI2 Analog input AI2 2
COMM Fieldbus reference REF2 8
COMM+AI1 Summation of fieldbus reference REF2 and analog input AI1. See section
Reference selection and correction on page 249 .
9
COMM*AI1 Multiplication of fieldbus reference REF2 and analog input AI1. See section
Reference selection and correction on page 249 .
10
DI3U,4D(RNC) Digital input 3: Reference increase. Digital input DI4: Reference decrease.
Stop command resets the reference to zero. The reference is not saved if the
control source is changed from EXT1 to EXT2, from EXT2 to EXT1 or from
LOC to REM. 11
DI3U,4D(NC) Digital input 3: 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 = AI(%) · (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
Parameters – complete descriptions
Index Name/Selection Description Def, FbEq
Internal scale (%)
4009
4008
100% 0%
Units (4006)
Scale (4007)
-1000%
+1000%