Bosch DDU 8, Руководство пользователя

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Example: Setting up a condition for maximum front brake
pressure.
20
20
10
Max brake pressure of the variable ‘front p_br_front_mx’
Reset
value
is used
Hold
max.
value Follow
max.
value
Reset
value
is used
Time
Time
Condition ‘p_br_front > 20’
Brake pressure front p_br_front
30
40
30
40
10
Brake pressure ‘front p_br_front’
Hold max.
value
Hold max.
value
Threshold
reached
▪ 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 condi‐
tion ‘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 OTH‐
ERWISE‐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, noth‐
ing 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 channels
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.
8.7
Display Configuration | 8
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