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Proline Prosonic Flow 91
Endress+Hauser
11.18 Group SUPERVISION
FAILSAFE MODE
The dictates of safety render it advisable to ensure that the device signal processing
assumes a predefined state in the event of an alarm. The setting you select here is valid for:
• Current output
• Pulse output
• Totalizer
!
This has no effect on the display.
Options:
MINIMUM VALUE
MAXIMUM VALUE
CURRENT VALUE (not recommended)
Factory setting:
MINIMUM VALUE
The response of the individual outputs and the totalizer is listed below.
Current output:
MINIMUM VALUE
The current output adopts the value of the lower signal on alarm level (as defined in the
CURRENT SPAN function on → ä 77).
MAXIMUM VALUE
The current output adopts the value of the upper signal on alarm level (as defined in the
CURRENT SPAN function on → ä 77).
ACTUAL VALUE
Measuring value output based on the actual flow measurement (alarm is ignored).
Pulse output:
MINIMUM or MAXIMUM VALUE
Output is zero pulse
ACTUAL VALUE
Measuring value output based on the actual flow measurement (alarm is ignored).
Totalizer:
MINIMUM or MAXIMUM VALUE
The totalizer is paused while an alarm is present.
ACTUAL VALUE
The totalizer continues to count on the basis of the current flow value.
The fault is ignored.
ACTUAL SYSTEM
Use this function to check the current system condition.
CONDITION
Display:
"SYSTEM OK" or the diagnosis message with the highest priority.
PREVIOUS SYSTEM
Use this function to view the 20 most recent diagnosis messages since measuring last
CONDITIONS
started.
Display:
The last 20 diagnosis messages.
Functional description SUPERVISION
Note!
Description of device functions
99
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