HBM MP85A - Page 132

FAQs: Frequently asked questions (MP85A and PME Assistant)
132 A0293_06_E00_03 HBM: public MP85A
start condition, and 5% of the range window for the stop condition. The per
centage refers to the relevant axis of the range window. Therefore, set the
start condition reference value sufficiently far above or below the initial (idle)
state of your signal (minimum start signal), so that the hysteresis for the
start condition can ensure that minor signal interference does not start the
process prematurely. The start condition ceasing to apply shown in the
examples is irrelevant in this case. The hysteresis for the stop condition is
necessary to ensure that noise or minor signal interference does not
already interrupt the measurement at time tx.
Start/stop via conditions, end when start condition no longer applies
Start and stop the process by means of various conditions, e.g. start when a
value exceeds the reference value, stop when a value is below the reference
value. The end of the measurement is reached when this start condition no
longer applies, i.e. if measurement was started when a value exceeded the
reference value, the value needs to fall below this point once more, plus the
hysteresis for the start condition (1%).
Flow diagram f) for start/stop/end conditions
Ready
Start Stop
Ready signal
may be issued
Stop condition
Start condition
End
Start with (internal) condition, stop with (internal) condition, end when
“leaving start condition”