In Controller Organizer, right-click on the Tasks icon and click on New Task.

In our project, there is no need to check for our non-critical alarms every 10 ms. We will create a new periodic task for processing alarms every 250 ms and give it low priority in order to reduce the load on our processor.

In the New Task form that appears, enter the following values:

Next, we will add our Program that will contain our Alarm function and handle the alarm processing for our project.

Right-click on our newly created AlarmTask task and click on the New Program option.

In the New Program form that appears, enter the following values:

Now we can move the DIGITAL_ALARM routine, which we created earlier in the book, to our newly created Alarm program. Expand MainTask and MainProgram in the Controller Organizer Tasks and drag-and-drop the DIGITAL_ALARM routine from MainProgram to MainAlarmProgram as shown in the following screenshot:

As we learned earlier, in order for a routine to be executed, it must be linked to a program. We will now set the DIGITAL_ALARM routine as the MainRoutine of MainAlarmProgram. Right-click on MainAlarmProgram and select Properties (or hit Alt + Enter). In the Program Properties form that appears, select the Configuration tab and, under the Assign Routines header, select DIGITAL_ALARM from the Main dropdown as shown in the following screenshot:

You will notice that, after assigning the DIGITAL_ALARM routine as the MainRoutine for MainAlarmProgram as shown in the following screenshot, the DIGITAL_ALARM icon changes to display 1 that indicates that it is the MainRoutine for the program:

Next, we will check to see whether or not we have introduced any errors in our controller with our latest changes. From the drop-down menu at the top of RSLogix 5000, navigate to Logic | Verify | Controller.

You will notice that the Errors pane has appeared and the following errors are listed:

Clicking on the first error message will directly take you to the DIGITAL_ALARMS FBD and highlight the FC1001_FLT_ALM ALMD element.

The error has occurred because the original FC1001_FLT_ALM was created with a scope of MainProgram and it cannot be accessed from the MainAlarmProgram.

In order to fix this problem, we will need to create the ALMD tag again at the Controller scope. Right-click on the FC1001_FLT_ALM tag and select the New "FC1001_FLT_ALM" menu option (or press Ctrl + W).

The New Tag form will appear. Ensure that the Scope field is set to FirstController and click on OK.

Next, we should remove the duplicate FC1001_FLT_ALM tag that exists in the MainProgram Scope. Under the MainTask and MainProgram folders of Controller Organizer, right-click on the Program Tags icon and select Edit Tags.

The Edit Tags table will appear; select the FC1001_FLT_ALM tag, right-click on the box to the left of the name, and select the Delete menu option (or press the Delete key).

We have now fixed the first error message; now, let's resolve the second. Clicking on the second error message in the error pane will take you directly to the Jump To Subroutine (JSR) reference within our MainProgram element's MainRoutine object to the DIGITAL_ALARM routine. The error is being displayed because the DIGITAL_ALARM routine is no longer in the MainProgram element's scope. Delete this Ladder Logic Rung by right-clicking on it and selecting Delete (or by pressing the Delete key while clicking on the rung selected).

Finally, we will Verify the program once more to ensure that we no longer have any problems.

From the drop-down menu at the top of RSLogix 5000, navigate to Logic | Verify | Controller.