Analog Points

Alarms > Alarms Overview > Alarm Types and Properties > Analog Points

Analog Points

Analog points have six alarm types. The Low Out-of-Range alarm has the highest precedence. The alarms are listed in the table below in order of precedence. See the PNT Editor - Analog Page for configuration information.

Alarm	Alarm Calculation Type	Calc Value 1	Calc Value 2		Configurable Bit
Out-of-Range	Value Range	High OOR Value	Low OOR Value	Magenta	01
High Deviation	Deviation Value	Deviation Value	N/A	Red	06
High Alarm	Maximum Value	Setpoint Value	N/A	Red	05
High Warning	Maximum Value	Setpoint Value	N/A	Red	04
Low Warning	Minimum Value	Setpoint Value	N/A	Yellow	03
Low Alarm	Minimum Value	Setpoint Value	N/A	Yellow	02

The High Deviation alarm applies when the value deviates from the previous value by the alarm setpoint. The deviation can be either positive or negative.

Alarm Deadband

Analog points have an Alarm Deadband option. This option applies to alarm resets. The point’s value must clear the deadband value before the alarm bit will be cleared.

Example

If the High Alarm setpoint is 300 and the Alarm Deadband is 10, the value must clear 290 before the alarm bit is reset. The AlarmDeadband option helps prevent chattering.