Preliminary User Manual UMAX023241 - Version: 1.1 19-63
1.6.1.
X-Axis, Input Data Response
In the case where the
X-Axis Type
=
Data Response,
the points on the X-Axis represents the data
of the control source. These values must be selected within the range of the control source.
When selecting X-Axis data values, there are no constraints on the value that can be entered into
any of the X-Axis points. The user should enter values in increasing order to be able to utilize the
entire table. Therefore, when adjusting the X-Axis data, it is recommended that X
10
is changed first,
then lower indexes in descending order as to maintain the below:
Xmin <= X
0
<= X
1
<= X
2
<= X
3
<= X
4
<= X
5
<= X
6
<= X
7
<= X
8
<= X
9
<= X
10
<= Xmax
As stated earlier,
Xmin
and
Xmax
will be determined by the X-Axis Source that has been selected.
If some of the data points are
‘Ignored’
as described in Section 1.6.3, they will not be used in the X-
Axis calculation shown above. For example, if points X
4
and higher are ignored, the formula becomes
Xmin
<= X
0
<= X
1
<= X
2
<= X
3
<=
Xmax
instead.
1.6.2. Y-Axis, Lookup Table Output
The Y-Axis has no constraints on the data that it represents. This means that inverse or
increasing/decreasing or other responses can be easily established.
In all cases, the controller looks at the
entire range
of the data in the Y-Axis objects and selects the
lowest value as the
Ymin
and the highest value as the
Ymax
. They are passed directly to other
function blocks as the limits on the Lookup Table output. (i.e used as Xmin and Xmax values in linear
calculations.)
However, if some of the data points are
‘Ignored’
as described in Section 1.6.3, they will not be used
in the Y-Axis range determination.
1.6.3. Default Configuration, Data Response
By default, all Lookup Tables in the ECU are disabled (
X-Axis Source
equals
Control Not Used).
Lookup Tables can be used to create the desired response profiles. If a Universal Input is used as
the X-Axis, the output of the Lookup Table will be what the user enters in
Y-Values
setpoints.
Recall, any controlled function block which uses the Lookup Table as an input source will also apply
a linearization to the data.
Therefore, for a 1:1 control response, ensure that the minimum and
maximum values of the output correspond to the minimum and maximum values of the
table’s Y-Axis.
All tables (1 to 2) are disabled by default (no control source selected). However, should an
X-Axis
Source
be selected, the
Y-Values
defaults will be in the range of 0 to 100% as described in the “Y-
Axis, Lookup Table Output” section above. X-Axis minimum and maximum defaults will be set as
described in the “X-Axis, Data Response” section above.
By default, the X and Y axes data is setup for an equal value between each point from the
minimum to maximum in each case.
