Limit Monitor; Table 7-3 Parameter Of The Limit Monitor - Siemens SITRANS P300 Operating Instructions Manual

Operating functions via HART

7.23 Limit monitor

7.23 Limit monitor
Description
You can activate up to three limit monitors in order to monitor any of the device variables.
The limit monitor monitors a value at an upper or lower limit value. If this limit is violated it
sends a diagnostic warning or a diagnostic interrupt. Select the Limit Monitor menu
command in SIMATIC PDM or in the handheld Communicator. You can program the
following values for each of the three limit monitors:
Table 7-3 Parameter of the limit monitor
Monitoring variable
Limit monitoring: warning / interrupt
Limit monitoring: upper / lower
Upper limit value
Lower limit value
Hysteresis
Response time
Stop time
Figure 7-18
7-34
You will be shown a list of the active device variables. This list is
independent of the measurement type selected.
Select whether a warning or a warning plus an interrupt should be
triggered when a limit is violated.
Specify here whether a device variable monitors the upper limit, the
lower limit, or both limits.
Upper limit value in the unit of the device variable.
Lower limit value in the unit of the device variable.
Operating point for chatter suppression in the case of small pressure
changes.
The time which must pass after the limit is violated before this violation
is registered.
The time for which a limit interrupt or warning will always be sustained
even when the event which triggered it is no longer present.
Trip levels for the limit monitor
SITRANS P300 with HART communication
Operating Instructions, 06/2005, A5E00359579-02