Applications - IFM Electronic LK7 Bedienungsanleitung

Applications

Hydraulic tank
OFS
Minimum level monitoring with prewarning and alarm
Switching output 1 (prewarning)
slightly above rP1 (to suppress wave movements)
below preset level → prewarning, start refilling
hysteresis function, normally closed (Hnc)
Switching output 2 (alarm)
min. value reached again → alarm reset
below min. value → alarm
hysteresis function, normally open (Hno)
L
prewarning
SP1
rP1
SP2
rP2
OUT1 1
Hnc
0
OUT2
1
Hno
0
If the level is below rP1, output 1 switches until liquid is refilled. If SP1
is reached again, output 1 switches back.
If the level is above SP2, output 2 switches. If the level falls below rP2
or if there is a wire break, output 2 switches back.
By setting SP1 the maximum level can be controlled/monitored: The
value of SP1 determines up to which level (max) is to be refilled. When
the maximum level is reached, this is signalled by the LED I going out
and output 1 switching off.
alarm
t
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