Instruction Manual AquaScat 2 P
Operation
38
11838E/2
A maximum of two limits with upper
and lower threshold values can be
programmed.
If the operating mode is set to
Ex-
ceeded
, then while the upper thres h-
old value is exceeded the limit is active
and remains active until the lower
threshold value is again undershot.
If the operating mode is set to
Under-
shot
, then while the lower threshold
value is undershot the limit is active
and remains active until the upper
threshold value is again exceeded.
Figure 17: Diagram of exceeded limit
Measuring value
Upper threshold value
Lower threshold value
Time
Limit active
Limit passive
LIMIT
If a limit event occurs during operation, it has the
following effects on measuring operation:
Threshold value display indicates an unusual
state.
If an output for the corresponding limit
channel is programmed, it is switched.
If the message
Limit
appears, the sta-
tus display changes to
white
and the
numbers of the limit channels where a
limit has been exceeded or undershot
are shown with the corresponding
channel numbers in
red
. Inactive limits
are indicated by the
_
icon.
Upper and lower
threshold value of a
limit.
Reading if limit ex-
ceeded or undershot
