Instruction Manual AquaScat S
Settings
68
13798E/3
8.3.1
Upper and lower threshold value of a limit
A maximum of eight limits with upper and
lower threshold values can be programmed.
If the operating mode is set to
Exceeded
,
then while the upper threshold value is ex-
ceeded the limit is active and remains active
until the lower threshold value is again un-
dershot.
If the operating mode is set to
Undershot
,
then while the lower threshold value is un-
dershot the limit is active and remains active
until the upper threshold value is again ex-
ceeded.
Figure 33: Diagram of limit exceeded
Measuring value
Upper threshold value
Lower threshold value
Time
Limit active
Limit passive
8.3.2
Reading if limit exceeded or undershot
If a limit event occurs during operation, it has the fol-
lowing 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 color of the status
display changes to
white
and the numbers of the
limit channels are listed with their channel numbers
in
red
if limits have been exceeded or undershot.
Inactive limits are indicated with
"
_
".