Create a new bit block alarm type definition:

1. In the project explorer, select the Alarms > Alarm types > Bit block node.

2. To create a new alarm type definition, right-click and select New from the context menu or click once on the table editor and press F8.

3. Indicate a name for the new definition in the Property Pages window, e.g. Sensor.

Create four new assignments in the alarm type definition:

1. In the project explorer, select the node of the bit block alarm type definition you have just created.

2. To create four new assignments, click on the table editor and press F8 four times.

3. For each assignment, type or select the Name, the triggering Bit number, the Text and the Alarm class on the Property Pages or in the table editor. Indicate the error cause in the Text parameter.

   Use the following values, for example:

   Name	Bit number	Text	Alarm class
   SensorFailure	0	No valid sensor input	Alarm
   SensorCalibration	1	Recalibration interval	Alarm
   VibrationLevel1	4	Vibration level 1 reached	Message
   VibrationLevel2	5	Vibration level 2 reached	Alarm

Create an alarm definition for each of the three sensors:

1. First, create an alarm group since alarms always require an alarm group. Indicate a name for the new alarm group in the Name parameter on the Property pages, e.g. Sensors.

2. Create an alarm definition for each of the three sensors. Indicate a Name and select the Event variable for each alarm definition:

   Name	Event variable
   Sensor1	Ch1.Sensors.1.Error
   Sensor2	Ch1.Sensors.2.Error
   Sensor3	Ch1.Sensors.3.Error

3. Indicate the alarm source in the Text parameter of the alarm definition (i.e. the sensor name). You have already indicated the error cause in the Text parameter in the assignments (step 2.c). Bind the assignment text (error cause) to the alarm definition text (error source) using the @J@ format string:

   Name	Text
   Sensor1	Sensor 1: @J@
   Sensor2	Sensor 2: @J@
   Sensor3	Sensor 3: @J@

   Type the @J@ string into the Text parameter or click on the ... button to open the Edit Localizable Text dialog and to insert the string.

   Ensure that the Text mode parameter of the bit block alarm type definition is set to Use text of alarm definition (default setting).

   At runtime, the format string will be replaced by the text of the respective assignment. This approach allows to combine error cause and error source in a single alarm text. For example, if at runtime Bit 4 is set by Sensor 1, then the alarm list or alarm line will show the following text: Sensor 1: Vibration level 1 reached.

1. Select an alarm definition, open the drop-down menu in the Type parameter and select Bit block.

2. Under Bit block types, select the bit block alarm type you created in step 1.