MoTeC Global Forum

Hi there,

I am using alarms for tyre pres on our car. Syntax is like:

"TP FL < x,xxbar AND Tyre Sens Air Temp >= XX °C AND TP FL > 0,00bar"

Ii it possible to decrease the trigger value of "TP FL < x,xx bar" by the "trigger value modifier" option. When I tried a negative value it says only positive(increasing) values are allowed.

Problem is we are running the car on Nurburgring Nordschleife (round about 24km track length) and if a TP Alarm occurs - let's say at kilometre "3" the driver has to finish the remaining 21km with recurring TP Alarms every 60secs. If the tyre loses air slowly it could be enough to decrease the trigger value by 0,3bar to finish the lap without annoying alarms.

Thanks in advance.

Greetz
Julian

Julian,

It may sound counter-intuitive but you still must enter a positive value to modify your alarm trigger value; whether the value goes up or down by that amount depends on the type of comparison.

For example, in your situation you might have a comparison as "FL Tyre Pressure < 1.0bar," and then the alarm is triggered. You might then write in a Trigger Value Modifier of 0.3bar. The comparison type is "Less Than," so when the trigger value is modified, it will go down by 0.3bar (to 0.7bar).

Essentially, you are writing the absolute value of the trigger modification you wish to see and then the logger is deciding whether to increment or decrement that value based on comparison type.

Thanks for your answer Paul.

Just to be sure, the option "Reduce trigger value when alarm is inactive for xx secs." returns the trigger value to the start value before it was modified, when the alarm doesn't show up for xx secs.

Greetz
Julian