Trace Function - Siemens SITRANS DA400 Operating Instructions Manual

Example
P.20/doAL3 = do4
P.22/doAL4 = ¬do6
Note
The parameter "P.25/P ouT" reverses the direction of action for all outputs.
7.3

Trace function

Timer control
The effect of the parameter "P.13/TIME" and the function of the trace timers "A1-UP" and
"A1-T" are described below using the example of acoustic channel 1 and the main alarm
"P.6/AL1". The same function applies to all other channels, alarms (AL) and pre-alarms
(PrAL).
The "*-UP" timers can be used to identify a temporary violation, before the final alarm is
triggered. The "*-T" timers indicate how long the alarm has been responding for. This can be
used to derive a schedule for repairs.
Time 1
Time 2
Time 3
Time 4
Time 5
Time 6
Time 7
Time 8
SITRANS DA400 for oscillating positive displacement pumps with protection against explosion
Operating Instructions, 10/2007, A5E00841127-01
The main alarm on acoustic channel 3 is output on digital output 4.
The main alarm on acoustic channel 4 is output inverted on digital
output 6.
The measured value exceeds the alarm value and timer "A1-UP" begins
counting.
The measured value falls below the alarm value hysteresis without the time
criterion "P.13/TIME" being reached. The timer "A1-UP" stops and retains its
value.
As for time 1
As for time 2
As for time 1
The time criterion "P13/TIME" is met. The alarm "AL1" is output. Timer "A1-
UP" retains its value. Timer "A1-T" starts to count the time.
The measured value falls below the alarm value hysteresis and activates the
time criterion "P.13/TIME" again.
The time "P13/TIME" has expired. The alarm is reset. Timer "A1-T" stops.
Signal processing
7.3 Trace function
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