Honeywell Series A User Manual page 74

Fieldbus interface module

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Table of Contents

3. Fieldbus Integration With Experion System

3.6. Notification Scheme

notification system. The following table summarizes the possible fieldbus alarm

enumerations and lists the alarm/event type identification to be used in the alarm

summary and event summary displays in Station.

Only the first alarm in an overlapping series of alarms associated with

BLOCK_ERR and XD_ERROR bitstring alarms is reported due to a flaw in

the Fieldbus Foundation Specifications regarding the alert state machine.

This has been reported to the Fieldbus Foundation through their Action

Request system and the Foundation has agreed to permit future devices to

issue alerts on changes to the status of any element of these bitstring alarms.

If no more than one of the bits is set at a time, the alarms are reported and

cleared properly

Fieldbus alarm functions do not support rate of change (ROC) alarms. ROC

alarms can only be generated in applications that use Control Builder Data

Acquisition blocks for input signal conditioning.

Experion PKS Series A Fieldbus Interface Module User's Guide

Undefended Alarm

Low Limit Alarm

High Limit Alarm

Critical Low Limit Alarm

Critical High Limit Alarm

Deviation Low Alarm

Deviation High Alarm

Standard Discrete Alarm

DevCtl Fail Alarm

Alarm/Event Type

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