TN DAS158 How to check the status of an individual topic within a DDESuitelink object utilizing the $Sys$Status tag

Description

This article from Insource walks through using the $Sys$Status tag to check communication status to an end device for a device connected through a DDESuitelink client object.

• Author: Joseph Hefner
• Published: 3/3/2017
• Applies to: Application Server 3.1 or later

Details

Step 1) Double click the DDESuitelink object that contains the topic you would like to monitor communication for:

Step 2) Click the Topic tab:

Step 3) Click the topic you wish to monitor and click the "+" to add and associated attribute for this topic:

Step 4) Enter $Sys$Status for the Attribute name and Item Reference:

Step 5) Click the Save and Close button in the top right:

Step 6) Click "OK":

Step 7) Right click the DDESuitelinkClient object and deploy the changes:

Step 8) Click the "OK" button:

Step 9) Click "Close":

Step 10) Open an object that will host the attribute to monitor the status of communication to the device. In this example I have created a User Defind object:

Step 11) Under the Attibutes tab click the "+" button to create a new attribute:

Step 12) Enter a name and select a type for the attribute. You can also select a message to display for the attribute as below:

Step 13) Click the I/O button:

Step 14) Click the"Read" radio button and click the button below to select the IO source:

Step 15) Select the item created in Step 5 above and click "OK":

Step 16) Click the Save and Close button in the top right corner:

Step 17) Click the "OK" button:

Step 18) Right click on the Object that holds the recently created attribute and deploy the change:

Step 19) Click the "OK" button to accept the default options:

Step 20) Right click the object and select "View in Object Viewer":

Step 21)  Find the attribute and the message associated with the attribute and drag them to the watch list below: 

Step 22) Confirm the status and the message associated with the connection status below: