Condition Channels - Bosch DDU 9 Manual

10.6 Condition channels

Bosch Motorsport
Example: Setting up a condition for maximum front brake
pressure.
Brake pressure front p_br_front
Brake pressure 'front p_br_front'
40
30
20
10
Max brake pressure of the variable 'front p_br_front_mx'
40
30
20
10
Reset
Hold Follow
value
max. max.
is used
value value
Threshold Hold max.
reached value
– At power-up, the reset value (10) is used for 'p_br_front_mx'.
– 'p_br_front' rises to 30. As 'p_br_front' is > 20 (condition is TRUE), the condition 'max
(p_br_front, p_br_front_mx)' in the THEN window is triggered. The condition sets the
bigger value as new value for 'p_br_front_mx'. As 'p_br_front' (30) is bigger than
'p_br_front_mx' (10), the new value for 'p_br_front_mx' is set to 30.
– Although 'p_br_front' falls to 25, the value of 'p_br_front_mx' stays 30. This is caused
by the THEN-condition, because p_br_front_mx' (30) is still bigger than
p_br_front' (25).
– As 'p_br_front' rises to 40. As 'p_br_front' (40) is bigger than 'p_br_front_mx' (30), the
new value for 'p_br_front_mx' is set to 40.
– As 'p_br_front' falls below 20, the IF-condition turns to FALSE. Now the OTHERWISE-
condition is triggered. Because the condition 'p_br_front_mx' sets the value of
'p_br_front_mx' and the value that is already set to 40 before, nothing changes.
– When 'p_br_front' rises to 40, the If-condition changes to TRUE again and triggers the
THEN-condition. Now the reset value (10) is used for 'p_br_front_mx' in the THEN-
condition.
– Because 40 is bigger than 10 the new value of 'p_br_front_mx' is 40.
Condition channel
– Logical operations on measurement channel(s)
– If-Else structure with reset
– Logical result
– Result can be used as input source for Alarm display elements and further calculations
in the whole RaceCon project.
Condition combination
– Combination of several (up to 16) condition channels for more complex calculations
Condition 'p_br_front > 20'
Time
Time
Reset
value
is used
Hold max.
value
DDU 9
Display Configuration | 10
65 / 148