282
Parameter listing and descriptions
ACH550-01 User's Manual
Analogue input reference correction
Parameter values 9, 10, and 14…17 use the formula in the following
table.
Where:
• C = Main reference value
(=
COMM
for values 9, 10 and =
AI
1 for values 14…17)
• B = Correcting reference
(=
AI
1 for values 9, 10 and =
AI
2 for values 14…17).
Example:
The figure
shows the reference
source curves for
value settings 9, 10,
and 14…17, where
:
• C = 25%.
• P 4012
SETPOINT
MIN
= 0.
• P 4013
SETPOINT
MAX
= 0.
• B varies along the
horizontal axis.
4011
INTERNAL SETPNT
unit and scale defined
by par 4006 and 4007
Sets a constant value used for the process reference.
• Units and scale are defined by parameters 4006 and 4007.
4012
SETPOINT MIN
-500.0…500.0%
Sets the minimum value for the reference signal source. See parameter
4010.
4013
SETPOINT MAX
-500.0…500.0%
Sets the maximum value for the reference signal source. See
parameter 4010.
Code Description
Range
Value setting Calculation of the AI reference
C + B
C value + (B value - 50% of reference value)
C * B
C value · (B value / 50% of reference value)
C - B
(C value + 50% of reference value) - B value
C / B
(C value · 50% of reference value) / B value
120
100
80
60
40
20
0
0
100%
9, 14 (+)
16 (-)
10, 15 (*)
17 (/)
B
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