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14.3 Storage tank
Monitoring of the acceptable range (alarm) and level control
Switching output 1: refilling
SP1 upper preset value reached → finish refilling
rP1 below lower preset value → start refilling
OU1 hysteresis function, normally closed (Hnc)
Switching output 2: safety function min - max
FH2 max. value exceeded → alarm
FL2 below min. value → alarm
OU2 window function, normally open (Fno)
XX�X = display value
A = refill; B = min� monitoring; C = max� monitoring
• If the level is below rP1, output 1 switches until liquid is refilled� If SP1 is
reached again, output 1 switches off�
• If the level is below FL2 or above FH2 or if there is a wire break, output 2
switches OFF (→ alarm).
• The logical operation between the outputs 1 and 2 indicates whether there is
overflow or the actual level is below the minimum level:
- Overflow: output 1 and output 2 switched OFF�
- Below min� value: output 1 switched ON and output 2 switched OFF�
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