Specifications

8 – Configuring Points
158 R400
You might use this feature, for example, if the controller on which this point is
built cannot continue normal functioning until the alarm state is acknowledged.
For further details, see the Quick Builder online help.
Alarm Properties for Analog Points
Four types of alarms can be configured for analog points:
• PV Limit
• Unreasonable High and Unreasonable Low
• Control failure
• External change
PV Limit Alarms for Analog Points
You can configure up to eight alarms for each analog point to indicate when the
PV goes beyond certain limits. You can also define the same types of alarms for
accumulator points.
Alarm Types and Limits
PV High
A PV High alarm is generated when the PV rises above the specified limit.
PV High High
A PV High High alarm is generated when the PV exceeds the specified limit,
which must be greater than the PV High limit.
Property See…
Alarm Type “PV Limit Alarms for Analog Points” on page 158.
Priority and Sub Priority “Defining Events, Alarms, and Alarm Priorities” on page 162.
Limit “PV Limit Alarms for Analog Points” on page 158.
External Change Alarms “External Change Alarms for Analog Points” on page 161.
Unreasonable Value “Unreasonable Low and Unreasonable High Alarms for
Analog Points” on page 160.
Control Fail Alarm “Control Fail Alarms for Analog Points” on page 161.
Alarm Message Index “Specifying an Alarm Message Index” on page 165.
Disable Alarming “Disabling Alarming” on page 165.
Alarm Deadband “Alarm Deadband for Analog Points” on page 161.
plscpcg.book Page 158 Monday, May 28, 2001 10:11 AM