Rockwell Automation T8xxx Application Note Trusted Intelligent Online Updates - Manual (Page 5)

Trusted TM
AN-T80009 Trusted
TM
Intelligent Online Updates
Issue 4 Nov 08 AN-T80009 5
If there are any function blocks which are not matched (either automatically or manually), the following
message appears (if the ‘Display Match Function Blocks Information Dialog’ option is selected):
Figure 4 Match Function Blocks Information Dialog
For these function blocks, review the report that follows to check that these function blocks are
genuinely deleted or new. The message ”WARNING: Detected unmatched function blocks.” also
appears at the end of the report.
1.3. Operation
When enabled, the Intelligent Update Manager runs each time an application is compiled and
downloaded. Intelligent Updates work by comparing the most recently compiled application with a copy
(or snapshot) of the application currently running in the controller. A list of variable values to be
transferred is generated that the controller loads when implementing an application update. When an
application is downloaded (either as the initial download or as an on-line update), the Intelligent Update
Manager utility saves a snapshot of that application in a database for use the next time the application
is compiled. This snapshot is necessary for the next Intelligent Update to work.
1.4. Important Information
The following information must be read and understood before working on a safety certified system.
Refer to sections 3.11 & 3.12 of the 8094 Safety Manual. These sections describe the standards and
procedures to be applied when programming and updating a safety system. They cover workbench
configuration, language selection, formal testing, program design, communications interaction and
online modification.
Refer to the Toolset User Guide section A.15.6. This section describes the preparation and application
of updates where only the normal method is available, but the section on ‘Operations’ is relevant to
both forms of update.
On-line variable forcing and power flow monitoring of a running application (on a live system) must be
carried out using the same version of the application as that running in the system.
Some changes to logic will cause function block internal variables to be reset to default values. This
may cause plant shutdowns. From release 3.5.1, the user is able to match function blocks to avoid
losing data. Before release 3.5.1, care must be taken with logic changes. These issues and others are
explained in section 1.12 and 1.13 of this document.
The capabilities of intelligent on-line updates are described in section 1.10 and 1.11 of this document.
Pay particular attention to cases where values will not be preserved.