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Operate
6.3 Description of the operating functions
SITRANS P500 with HART
Operating Instructions, 12/2014, A5E02344528-09
167
Parameter names
Description
"3.8.1.6 HiHi Value" (Page 134)
"HI HI" Upper limit value alarm in the unit of the selected PV.
"3.8.1.7 Hysteresis" (Page 134)
Threshold for disregarding changes in pressure that are too small
(Page 134)
The time that should elapse after the limit value has been exceeded or undershot,
before a warning or an alarm is triggered.
"3.8.1.9 Hold Time" (Page 134)
The period of time for which a warning or an alarm is maintained, even if the limit
was exceeded or undershot for only a very brief period.
Figure 6-21 Trip levels for limit value indicator
The limit violation of the limit value indicators can be counted by activating a limit value
counter.
Messages from the limit value indicator as well as limit event counter can be acknowledged
separately.
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