UMAX140610. LIN
– J1939 CAN Protocol Converter with PWM Output. Version 1
Page: 32-81
An example of a CAN message (0 to 100) used to control a default table (0 to 100) but with a
‘Jump To’
response instead of the default
‘Ramp To’
is shown in the figure below.
Figure 16
. Lookup Table “Jump To” Data Response
Lastly, any point except (0,0) can be selected for an
‘Ignore’
response. If “
Point N
–
Response
” is set to ignore, then all points from (X
N
, Y
N
) to (X
10
, Y
10
) will also be ignored. For
all data greater than X
N-1
, the output from the Lookup Table function block will be Y
N-1.
A combination of
‘Ramp To’
,
‘Jump To’
and
‘Ignore’
responses can be used to create an
application specific output profile. An example of where the same input (i.e. a CAN Message)
is used as the X-Axis for two tables, but where the outpu
t profiles ‘mirror’ each other for a
deadband joystick response is shown in the figure below. The example shows a dual slope
output response for each side of the deadband, but additional slopes can be easily added as
needed.
Figure 17. Lookup Table Examples to Setup for Joystick Deadband Response
