UNITRONICSAlarm Task

Alarms

Built in the controller

Powerful function

(V130/V350/V570)

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Movie

What is an alarm?

An Alarm is an event that must be reported to the

machine operator

The event is a change in the Alarm’s Trigger

condition, linked to Boolean or numeric value

An Alarm can:

Provide instructions

Require operator action

Play an active role in conditions

running the process

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HMI is already built in – no need of special design

Alarms

Vision controllers support up to 128 Alarms,divided into up to 16 groups

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Terminology- Active alarm

An alarm is active as long as its Trigger

condition is met .

Whenever the Trigger Condition is:

True, the Alarm is active

False, the Alarm is inactive

An active alarm cannot be reset.

When active, an alarm is marked with the

character ‘Y’ in the Alarm Details display

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Pause Alarms

Clear pending alarms and rescan bit

Number of active alarms

Alarm is Active

pending for reset /view / acknowledge

Alarm is Pending

Groups definition on the PC

How to do it

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Alarms in groups Large option for trigger

alarms Option for help/comments

with each alarm Option to set password for

acknowledge/reset the alarm Multilingual support – via

String Library Alarm history

Alarms

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Alarm Displays

There are four types of displays

Groups with Pending Alarms

Alarms in Group

Alarm Details

Alarm History

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Alarm Displays

Groups with Pending Alarms

Alarms are arranged in groups.

This display shows all groups that contain one or more pending Alarms. If the Alarms in a group are no longer pending,the group is not displayed.

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Alarm Displays

Alarms in Group

IDAlarm ID number, assigned when the Alarm is created.

Time OnTime stamp of the most recent time the Alarm became Active.

AckIf the Ack button has been pressed.

Alarm Name

The Alarm name assigned in the Alarms Configuration.

Detailsdrills down to the details of the specific Alarm.

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Alarm Details

GroupThe Alarm's Group ID and Name.

IDThe Alarm's ID and name.

DateDate and time stamp of the most recent time the Alarm became Active.

CountThe number of times the Alarm became Active before Pending action is taken.

ActiveShows if the Alarm's Trigger condition is true.

Additional info

This window contains instructions for the machine operator.

Alarm Displays

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One can request that an alarm will be logged.

Up to 256 alarms can be saved in the memory of the PLC. when it is full it functions according to FIFO.

Alarms from the history buffer can be viewed in the alarms history display

Alarm History

Note: If the PLC contains an SD card, you can turn SB 352 ONto enable the PLC to write the history to the SD card.

Alarm Displays

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Alarm Pause

When the Pause icon appears at the bottom of the display, it means that the Alarms action is suspended.

Alarm Displays

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The alarm task is running as

part of the PLC's cycle

The task's displays are part of

the operating system

It's up to the user to call the

alarm's displays

How does it run?Important!

When the alarm’s displays are on, the applications display is still active in the background and subroutines that are called under it are still running

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Ladder Elements

One can jump to the group display, the alarms in group display or to a detailed alarm display.

The jump will be done only if the conditions are met

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Thank You

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Terminology

Active alarm

Pending for view

Pending for acknowledge

Pending for reset

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Can an operator reset an alarm while the temperature is above a set point?

Submit Clear

Test your Knowledge: Active Alarm

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Groups definition on the PC

Lets open

VisiLogic application

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