ABB ACS880 Firmware Manual page 228

228 Parameters
No. Name/Value
40.14 Set 1 setpoint
scaling
-32768.00 ...
32767.00
40.15 Set 1 output scaling
-32768.00 ...
32767.00
40.16 Set 1 setpoint 1
source
Not selected
Control panel
Internal setpoint
AI1 scaled
AI2 scaled
Motor
potentiometer
Freq in scaled
Other
40.17 Set 1 setpoint 2
source
40.18 Set 1 setpoint
function
In1 or In2
In1+In2
In1-In2
In1*In2
In1/In2
MIN(In1,In2)
MAX(In1,In2)
AVE(In1,In2)
sqrt(In1)
sqrt(In1-In2)
Description
Defines, together with parameter
a general scaling factor for the process PID control chain.
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
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
40.15. For example, the values 50 and 1500 would produce
the same scaling as 1 and 30.
Process setpoint base.
See parameter 40.14 Set 1 setpoint
Process PID controller output base.
Selects the first source of process PID setpoint. This setpoint
is available in parameter
setpoint 1. See the control chain diagram on page 403.
None.
03.01 Panel reference (see page 92).
Internal setpoint. See parameter
sel1.
12.12 AI1 scaled value
12.22 AI2 scaled value
22.80 Motor potentiometer ref act
potentiometer).
11.39 Freq in 1 scaled (see page 109).
Source selection (see Terms and abbreviations
Selects the second source of process setpoint. This setpoint
is available in parameter
setpoint 2.
For the selections, see parameter
source.
Selects a mathematical function between the setpoint
sources selected by parameters
source and 40.17 Set 1 setpoint 2
No mathematical function applied. The source selected by
parameter 40.25 Set 1 setpoint selection
Sum of sources 1 and 2.
Source 2 subtracted from source 1.
Source 1 multiplied by source 2.
Source 1 divided by source 2.
Smaller of the two sources.
Greater of the two sources.
Average of the two sources.
Square root of source 1.
Square root of (source 1 - source 2).
40.15 Set 1 output
40.15
scaling.
40.25 Set 1 setpoint selection
40.19 Set 1 internal setpoint
(see page 113).
(see page 114).
(output of the motor
40.25 Set 1 setpoint selection
40.16 Set 1 setpoint 1
40.16 Set 1 setpoint 1
source.
is used.
Def/FbEq16
scaling, 1500.00
to the
40.14 and
1 = 1
1500.00
1 = 1
AI2 scaled
as
0
1
2
3
4
8
10
on page 88). -
Not selected
as
In1 or In2
0
1
2
3
4
5
6
7
8
9