Alarm conditions for PDO

Use the Alarms
tab on the PDO Properties
dialog box to set the values that define alarm conditions for Process Discrete Output (PDO) instructions.

Define alarm conditions for PDO instructions

On the instruction in the routine, perform one of these actions:

On the Ladder or FBD instruction, select

In the Structured Text editor, right-click the tag name and select Configure <tag name>
.

Select Alarms
.

Set the parameters:

Use
. Select the check box to put the alarm in use. Alarm driving conditions are not evaluated when the alarm is not in use. The Use
check box is synchronized with the Use and evaluate alarm
check box in the Alarm Properties
dialog box.

Alarm.
Type the label to be displayed for the alarm.

Edit button
. Select

to open the Alarm Properties
dialog box for an alarm.

Apply following settings to all alarms
. Select the check box to apply settings (Class, Alarm group, FactoryTalk View command) to all pre-defined alarms for the instruction. It is important to add information to all three settings when applying alarms. If one of the settings is empty, the settings are cleared in all alarms. When changes are applied, the settings and the check box are cleared.

Class
. Use classes to group related alarms. The class applies to all alarms defined for the instruction including pre-defined and user-defined alarms. Use the class only to filter the alarms that are displayed to the operator. The class is case-sensitive.

Alarm group
. Assigns all pre-defined alarms for the instruction a group name to help classify and sort alarms.

FactoryTalk View command
. A

FactoryTalk View

command that can be run on the operator station when the alarm notification appears. Type the exact syntax for the

FactoryTalk View

command. The command applies to all pre-defined alarms for the instruction.

Allow operator to shelve alarms
. Select the check box to allow the operator to shelve alarms.

Allow maintenance to disable alarms
. Select the check box to allow maintenance to disable alarms.

View the read-only parameters:

State
. The state of the alarm. Hover over the state icon to see a tool tip that describes the alarm state or fault status.

An alarm can be in more than one state at a time. For example, an alarm can be in alarm, acknowledged, and suppressed; or normal, unacknowledged, and suppressed.

Alarm state icons include:

Normal, acknowledged (no icon).

Normal, unacknowledged - NormalAlarmUnacknowledged