ROOTECH ACCURA 2350-DCM, Руководство пользователя

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Chapter 2 Accura 2350-DCM Operation/Setup Accura 2350-DCM User Guide
Page 22
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Under Event
An Under event occurs when the measured value falls below the start level(threshold 1) and is above the
residual level(threshold 2), and the value is maintained during the delay time. If the residual level is
abnormally configured to a value above the start level, the residual level is considered to be zero.
Figure 2.8 shows the case where the measured value is above the residual level, and figure 2.9 shows the
case where the measured value is below the residual level. An Under event does not occur if the
measured value falls below the residual level from normal state within the delay time. When the residual
level is set to 0, Under events are determined only based on the start level.
Fig 2.8 Occurrence of Under Event/Clearing Alarms
Threshold2 Level
Threshold Level
Button clear
Pickup signal
Start Event
End Event
Button Clear
Event LED
DO (latch)
DO (pulse)
with Hysteresis
End
Event
Time Delay
Start
Event
Time Delay
Start
Event
Voltage /
Current
(20ms data)
Fig 2.9 Current Value below the Threshold 2 Level
Threshold2 Level
Threshold Level
Pickup signal
Start Event
End Event
Button Clear
Event LED
DO (latch)
DO (pulse)
with Hysteresis
Time Delay
Start
Event
Time Delay
Voltage /
Current
(20ms data)