Siemens 7MC3040-..., Руководство по эксплуатации, Страница: 31 / 116

s
Operating manual PA
23
Limit 1 (
LI. 1
)
Before beginning the measurement, the
temperature reading must have been lower
than Limit 1 at least once.
If Autoreset (
A.RST= ON
) the limit 1 will
be ignored
Limit 2 (
LI. 2
)
Limit 2 must be exceeded at least for the
duration of the time delay (
T.DEL
).
Time Delay (
T.DEL
): See above
When the conditions are fulfilled, the sampling time can begin. (
T.ACT
).
Sampling time (
T.ACT
) During the sampling time the temperature is
detected and stored as a temperature val-
ue.

NOTE !
Is the parameter
T.ACT
= 0 automatically the end of the discon-
tinuous process is detected. At the parameter
T.ACT
instead of
the time “auto” is displayed
The configuration of the Normal Display Mode (
ANO
) determines which
temperature value is saved during sampling
Display mode (
ANO
)
„t=0“ displays the lower temperature range
limit during the measurement. „
T.HLD
“ in-
dicates the previous temperature reading
during the current measurement.
As an option, the green Status LED can light up or the digital output can
be use to indicate sampling.
When the sampling time has ended, an average value is calculated for
recorded measuring cycles. The temperature reading is weighted with
the previously saved average value and added.
Weighted average
(
F-PR
)
Factor for average weighting. If you choose
100%, averaging will be off.
The smaller you set the
F-PR
factor, the stronger the weighting will be.
When the averaging function is activated (
F-PR
<100%) a plausibility
check will be performed. The difference in temperature between the cur-
rent reading and the previously stored average is established. If the dif-