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Parameters 261
In1+In2
Sum of sources 1 and 2.
1
In1-In2
Source 2 subtracted from source 1.
2
In1*In2
Source 1 multiplied by source 2.
3
In1/In2
Source 1 divided by source 2.
4
MIN(In1,In2)
Smaller of the two sources.
5
MAX(In1,In2)
Greater of the two sources.
6
AVE(In1,In2)
Average of the two sources.
7
sqrt(In1)
Square root of source 1.
8
sqrt(In1-In2)
Square root of (source 1 - source 2).
9
sqrt(In1+In2)
Square root of (source 1 + source 2).
10
sqrt(In1)+sqrt(In2)
Square root of source 1 + square root of source 2.
11
40.11
Set 1 feedback filter
time
Defines the filter time constant for process feedback.
0.000 s
0.000…30.000 s
Feedback filter time.
1 = 1 s
40.14
Set 1 setpoint scaling
Defines, together with parameter
40.15
Set 1 output
scaling
, a general scaling factor for the process PID
control chain.
If the parameter is set to zero, automatic setpoint scaling
is activated, where suitable setpoint scale is calculated
according to selected setpoint source. Actual setpoint
scale is shown in parameter
40.61
Setpoint scaling actual
.
The scaling can be utilized when, for example, the
process setpoint is input in Hz, and the output of the PID
controller is used as an rpm value in speed control. In this
case, this parameter might be set to 50, and parameter
40.15
to the nominal motor speed at 50 Hz.
In effect, the output of the PID controller = [
40.15
] when
deviation (setpoint - feedback) = [
40.14
] and [
40.32
] = 1.
Note:
The scaling is based on the ratio between
40.14
and
40.15
. For example, the values 50 and 1500 would
produce the same scaling as 1 and 30.
0.00
-200000.00…
200000.00
Scaling.
1 = 1
40.15
Set 1 output scaling
See parameter
40.14
Set 1 setpoint scaling
.
If the parameter is set to zero, scaling is automatic:
0.00
-200000.00…
200000.00
Process PID controller output base.
1 = 1
40.16
Set 1 setpoint 1
source
Selects the primary source of process PID setpoint. See
the control chain diagram on page
506
.
Not selected
Not selected
None.
0
Internal setpoint
Internal setpoint. See parameter
40.19
Set 1 internal
setpoint sel1
.
2
AI1 scaled
12.12
AI1 scaled value
3
No.
Name/Value
Description
Default
FbEq 16
Operation mode
(see par.
19.01
)
Scaling
Speed control
46.01
Speed scaling
Frequency control
46.02
Frequency scaling
ACS380 FW.book Page 261 Friday, May 4, 2018 4:18 PM
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