TriggerChangeRate('Expression','DeltaY*','DeltaT*','DeadTime*')
Arguments
|
'Expression' |
Measured value |
|
'DeltaY*' |
Required value distance for releasing the trigger |
|
'DeltaT*' |
Time interval considered; limit value = 1,000,000 × module timebase |
|
'DeadTime*' |
Time specification in seconds, for which the trigger condition must be fulfilled until release. If no delay is desired, the value 0 must be entered. |
Parameters ending with * are only evaluated once at the start of the acquisition.
Description
The function returns TRUE as long as the change of the measured value 'Expression' (dy) within the interval 'DeltaT' is greater than 'DeltaY'.
Note |
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|---|---|
 |
The function compares the distance of the values with the time difference between DeltaT and DeltaY; the slope of the curve can also vary between the values. The time difference to be considered DeltaT is limited to 1-millionfold the module timebase. |
Example
Differences in trigger initiation and impact of the 'DeadTime'
Solution
|
Red |
Measured value |
Blue |
Trigger release with ∆Y=1 and ∆T=1 |
|
Yellow |
Trigger release with ∆Y=1 and ∆T=1 |
Purple |
Trigger release with ∆Y=2 and ∆T=2 |