74
SAW sensor - Parameter
Type 8098
increasing
monitored
value
decreasing
monitored
value
A:
Error low
D:
Error high
C:
Warning high
B:
Warning low
A
B
C
D
1
2
2
3
3
H
H
H
H
1
2
3
1
2
3
h: value of the hysteresis. An hys-
teresis value that is equal to 0
means that the device reacts as
soon as a limit is reached.
A: low error limit (
Error low
)
B: low warning limit (
Warning low
)
C: high warning limit (
Warning
high
)
D: high error limit (
Error high
)
1: normal range of the monitored
value
2a: lower warning range of the
monitored value
3a: lower error range of the moni-
tored value
2b: upper warning range of the
monitored value
3b: upper error range of the moni-
tored value
Monitored
value is in the
Colour of the status indicator and
generated message
Condition
Error range
Red
9)
status indicator,
Failure
message
•
if the monitored value was in the LOWER
warning range and the LOW ERROR value is
reached.
•
if the monitored value was in the UPPER
warning range and the HIGH ERROR value is
reached.
Warning range
Yellow
9)
status indicator,
Out of
specification
message
•
if the monitored value was in the LOWER error
range and the LOW ERROR value + the HYS-
TERESIS value is reached.
•
if the monitored value was in the normal range
and the HIGH WARNING value is reached.
•
if the monitored value was in the UPPER error
range and the HIGH ERROR value minus the
HYSTERESIS value is reached.
•
if the monitored value was in the normal range
and the LOW WARNING value is reached.
Normal range
White
9)
status indicator, no message,
if the
Diagnostics
in the menu
SAW
sensor
-
Parameter
is inactive (default
setting).
Green
9)
status indicator, no message, if
the
Diagnostics
in the menu
General
settings
-
DIAGNOSTICS
are active.
•
if the monitored value was in the LOWER
warning range and the LOW WARNING value +
the HYSTERESIS value is reached.
•
if the monitored value was in the UPPER
WARNING range and the HIGH WARNING
value minus the HYSTERESIS value is reached.
Figure 19:
Operating principle of the monitoring with an hysteresis
9) If the operating mode of the status indicator is set to NAMUR. See chap 10.4.
English
