Alarm Groups, Email Notifications

Configuration Process

To ensure the proper functioning of this tool, it is necessary to confirm two things: if the sending method is correctly described, and if the alarm is triggering properly.

Creating a Sending Method

The notification method is the script that will run when the alarm was triggered.

Go to Scripts → Classes and create C# class from the Server domain, then create a public method as the following.

public void NotificationMethod(AlarmEventInfo[] events)

For this example, the name "NotificationMethod" was chosen, but any name is possible. The essential thing is that the method is public and that the arguments are as described.

Binding Method to Alarm Group

After creating a method, we need to bind it with an AlarmGroup. This can be done through the "NotificationMethod" column in the Alarms → Groups table.

There are two ways to set this field, either by writing the full method path or by using the visual interface, clicking on "..." button on right side of this field.

If you chose to write the full path, the string will be like this: 

Script.Class.<CLASS NAME>.<METHOD NAME>

For this example, it would be: "Script.Class.NotificationsHandle.sendEmail".

If you choose to do it by the interface, a display like this will appear:

The Script.Class tree shows every class with the domain Server. 

To select a method, navigate through this tree and select the method that will be used for the callback when an alarm happens. Note that the full path appears in the label "Asset Path".

Click OK to save the changes. 

Example 1 - Sending E-mail C#

Creating Tags and Interface

To send an e-mail, some information is needed, such as the source e-mail, the target e-mail, the SMTP link, and the password for the source account. Then, we need one tag for each of these properties. To better organize the solution tags, we will use a template specifically for these settings. Furthermore, the “Sensor” tag will be used to trigger the alarm condition. In order for your project to send an email when an alarm occurs, you need to configure some alarm items. See the images below:

Display Configuration

To send an e-mail, we'll need the previously created information. You also need to add a way to change the sensor value and visualize the alarms.

Create a Class Method

The next step is to configure the NotificationMethod column in the Alarms → Groups section like the following image:

The NotificationMethod then receives the alarm events that are being generated. See an example of code below in which an email is sent from a template called "MyEmailSettings"

public void SendEmail(AlarmEventInfo[] events)
{
 //Protection in case events its null
	if (events == null)
		return;
	
	//Get the first event
	AlarmEventInfo eventX = events[0];
	if  (eventX.State != 1)
		return;
	
	//Get information about the alarm event to create the body of the email	
	string body = "Time: " + eventX.ActiveLocalTime.ToString() + "\n" +
	"Message = " + 	eventX.Message + "\n" +
	"Area = " + eventX.Area + "\n" +
	"Group = " + eventX.Group + "\n" +
	"Tag = " + 	eventX.TagName + "\n"	 ;   
    
	//Code to send email			
	try 
	{
	    //Configuring the SMTP Client
		System.Net.Mail.SmtpClient mySmtpClient = new System.Net.Mail.SmtpClient(@Tag.MyEmailSettings.Server_SMTP, 587);
        mySmtpClient.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
        mySmtpClient.EnableSsl = true;
        mySmtpClient.UseDefaultCredentials = false;
        mySmtpClient.Credentials = new System.Net.NetworkCredential(@Tag.MyEmailSettings.senderEmail, @Tag.MyEmailSettings.senderPassword);
        //mySmtpClient.Credentials = new System.Net.NetworkCredential("welliton.faturas@hotmail.com", "AGBDLCID3aA");
       
		//Sending the email
		mySmtpClient.Send(@Tag.MyEmailSettings.senderEmail, @Tag.MyEmailSettings.recipientEmail, "Email notification", body);
      
	}
	catch (Exception ex)
	{
		@Info.Trace("Error sending message: " + ex.Message);
	}
	
}

Execution

Every time an alarm happens when the project is running, the method configured in the NotificationMethod column is called. The method will receive an Array of the AlarmEventInfo class as a parameter. The following members can be used for the AlarmEventInfo class.

DateTimeOffset AckTime 
         DateTimeOffset ActiveLocalTime 
         DateTimeOffset ActiveTime 
         string Area 
         string Category 
         string ColorBG 
         string ColorFG 
         string Comment 
         int Condition 
         DateTimeOffset DateCreated 
         string Deadband 
         string DetailsValue 
         int Disable 
         TimeSpan Duration 
         string Group 
         string Level 
         string Limit 
         string Limit1 
         string Limit2 
         string Message 
         DateTimeOffset NormTime 
         int Priority 
         int Quality 
         string Setpoint 
         string SetpointDeadband 
         int State 
         string TagName 
         int UnAck 
         string UserName 
         string Value

Once you have defined the NotificationMethod, you can do other actions besides sending an email, such as send an email, such as sending a message box, creating sound for an alarm message, etc.

In this section: