GE AF-600 FP Metasys Operating Instructions Manual page 21

The drawing below illustrates the AI COS handling.
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Alarm Enable or Warning Enable must be set in the Object Configuration Attribute (Attribute 1). Low/High Alarm limits (Attribute 8, 11) or Low/High Warning limits
(Attribute 9, 10) must be programmed. Differential Value (Attribute 12) must also be programmed.
Alarm Enable must be set in the Object Configuration Attribute (Attribute 1).
Normal state must be programmed in the Object Configuration Attribute (Attribute 1)
Att XX = Attribute number, HA = High alarm, LA = Low alarm, HW = High Warning, LW = Low Warning
The AI COS alarms will only be cleared when the point value goes below the high alarm/warning or above the low alarm/warning limit by more than the programmed
differential value (Attribute 12).
The BI COS will set the Alarm (Object Status bit 4) if COS enabled (Object Configuration Bit 0) is set, Alarm Enabled (Object configuration bit 3) is set, and Current
State (Object Status bit 6) is different from Normal State (Object Configuration bit 1).
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For AI:
For BI:
AF-600 FP Metasys