ETAS
Functional Description
ES441.1 - User Guide
56
5.10
Timeout (Monitoring the Input Signal)
The Timeout function enables the signals at the input channels to be moni
-
tored. This time can be configured separately for each measurement channel
in the calibration software.
A check is carried out to see whether at least one signal change has taken place
within this time. If there is no signal change, no new measure values can be
determined. Depending on the measuring capability activated, the ES441.1
assigns fixed values to all sample values which follow in terms of time with the
Timeout function. They are transferred to the calibration software the next time
sampling takes place. These values are determined according to the measur
-
ing capability.
Fig. 5
-
31
Timeout
If the timeout of the ES441.1 has expired,
• the measured frequency (revolutions/min, velocity, flow, …) is set to zero,
• the duty cycle is set to 0% or 100% depending on the state,
• the active and inactive time of measurements of the state, period dura
-
tion or cycles are set to zero and
• the period duration is set to zero.
Frequencies whose period durations exceed the selected timeout cannot be
measured.
The Timeout function is also used when the input signal is outside the measur
-
ing range of the ES441.1.
Example: Frequency Measurement around Zero
If there is no change of the input signal after the expiry of a timeout in the mea
-
suring capability frequency measurement, the measure value is determined as
being f = 0 Hz.
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