Disabling a particular Alarm in 800xA V4.1

We have 800xA Ver4.1. Due to a problem in field Object Error alarm is generated for a particular IO again and again. Controller in AC800M series PM865. I have tried to disable the alarm by right clicking in alarm list and clicking disable selected. When I do this event is generated that xx-PY-071 alarm has been disable but the alarm still appears again and again.
Any idea how to disable this alarm.

The controller application is SIL2. AEobject error FB is used for this alarm generation.

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dayyanbajwa Rank: 1017

Asked 6 months ago

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Have you evaluated if Alarm Hiding may be a work around for you?

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by dayyanbajwa Rank: 1017 on 8/31/2020 6:13:14 AM | Like (0) | Report

Not familiar with alarm hiding configuration steps.
Disabling alarm should be a simple step but I am not sure why it is not disable. I checked the Alarm Collector definition tab, "Supports Disabling" is enabled.

Stefan Stromqvist AKS expert

Rank: 1 on 8/31/2020 8:06:36 AM | Like (2) | Report

Disabling is a two way street - what the HMI can disable, the PLC can enable (just have a look at the EnCond and DisCond pins of an AlarmCond block). Maybe the hardware alarm is set to "activate" + "enable" to make sure an operator does not make the mistake to disable a system alarm and forget it.

Alarm Hiding is a layer above the PLC; it will not be aware of the hiding. Read the user manual, add a Hiding Mask and add a Hiding Rule; then you are all set. Just recall a hidden alarm will present a funny looking alarm control (having a white base).

by dayyanbajwa Rank: 1017 on 9/1/2020 3:39:21 AM | Like (0) | Report

Thank you Stefan, used the masking method. It worked fine. The process alarm is no longer appearing in active alarm list.
The system alarm (hardware alarm) still appears.

by kstoilov AKS expert

Rank: 5 on 9/2/2020 9:23:36 AM | Like (0) | Report

Hi,
The manual says that some alarm categories, including System Alarms are excluded from Alarm Hiding functionality

Stefan Stromqvist AKS expert

Rank: 1 on 9/3/2020 12:32:39 AM | Like (0) | Report

@kstoilov: good catch!

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Stefan Stromqvist AKS expert

Rank: 1

Answered 6 months ago

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Disabling a particular Alarm in 800xA V4.1

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