Configuring analog alarms for plant objects (RT Unified) - WinCC Unified

Introduction

If you have configured an alarm system for plant objects you can display the hierarchy path of the alarm source and the alarm status of a line or a machine in runtime, filter the alarm control by plant objects and navigate to the alarm source.

You can also filter the most frequently occurring alarms by plant object and only permit the alarm of the respective object and all lower-level objects to be displayed.

An alarm is linked to the respective plant object type. If you delete the plant object type the alarm will also be deleted.

Requirement

• A plant object type with associated external or internal data members (with elementary data types) has been created.

• The plant structure has been assigned to a device.

Procedure

1. Select the respective data member of the plant object type on the basis of which you want to configure an alarm.

2. Enter the alarm text under "Properties > General".

3. To create a new analog alarm, double-click in the table on "<Add>" under "Analog alarms" in the table.

   A new alarm is displayed.

4. To configure the alarm, select "Properties > General" in the Inspector window:

   • Enter the alarm text.

   • Change the name of the alarm as required.

   • Select the alarm class.

   • Configure the priority of the alarm (a value of between "0" and "16").

     

   Note The alarm text must be unique in the context of the plant object type. Hierarchical information is not permitted in the alarm text.

   Note You can use the priority to sort or filter the alarms in the alarm control. With sorting by priority, you can ensure that the most important alarm (high priority) is shown in the display area in a single-line alarm control. If you filter the alarm control by priority "16", only the alarms with priority "16" will appear.

5. In the Inspector window, select the tag that triggers the alarm, e.g. a data member, under "Properties > Trigger".

   Note Only the data member of the plant object type is permitted as trigger tag.

6. In the Inspector window under "Properties > Trigger", enter a limit in the "Value" field in the "Limits" area.

7. Select the trigger mode in the "Mode" field:

   • "Lower": The alarm is triggered if the limit is undershot.

   • "Upper": The alarm is triggered if the limit is exceeded.

   • "Equal": The alarm is triggered when the limit is reached.

   • "Not equal": The alarm is triggered if the limit is not reached.

   • "Lower or equal": The alarm is triggered if the limit is undershot or reached.

   • "Greater or equal": The alarm is triggered if the limit is exceeded or reached.

8. You can create additional limits for the alarm, if necessary. Note the following:

   • A tag is monitored using only one alarm type. You should therefore create either analog alarms or discrete alarms for a tag.

   • If the object included in the selection does not yet exist, create it in the object list and change its properties later.

9. Select the analog alarm to which you want to assign the limits.