Normally, domain data is only read when the domain display is initiated or when you click the Read from PLC or Write to PLC buttons. You can have data updated automatically by doing the following:
Click on the File menu.
Select Live Update from the submenu.
When Live Update is enabled, the domain values are read and updated automatically approximately every three (3) seconds.
To return to manual mode:
Click the File menu. Note that Live Update has a check mark next to it.
Select Live Update again to turn off the Live Update mode.
Series 90 PLC fault table.