Rockwell Automation T8xxx Application Note Trusted Intelligent Online Updates - Manual (Page 2)

Trusted TM
AN-T80009 Trusted
TM
Intelligent Online Updates
Issue 4 Nov 08 AN-T80009 2
1. Intelligent Update Enhancement
An on-line update involves changing an application on the Toolset which is currently running on a
system, loading those changes into the system, then having the system switch to the changed
application without interruption to the process that the application is controlling.
The Trusted TM system supports two types of on-line updates: ‘Normal’ and ‘Intelligent’. Normal
updates are available in all released versions of the Trusted TM system. Intelligent Updates are only
supported from release 3.4 onwards. Both on-line update features enable the user to modify the
application while the process is running. Both types of on-line updates perform essentially the same
function, but Intelligent Updates allow the application to be modified in a number of ways that Normal
Updates would not allow.
‘Normal’ updates allow changes to an application as long as the data memory space does not change
between the application programs (the ‘CRC’ for the application must not change). This means that
there can be no added or deleted variables or function blocks called within programs. For other
changes which affect the data space see the Toolset User Guide section A.15.6. This means that
spare variables, function blocks, programs etc. must be declared in advance, and ‘MNTV’ settings in
the Toolset ISA.INI file must be set to specify the number of spare variables of each type (details are
given in the Toolset User Guide as above).
‘Intelligent’ updates allow the data memory space to change, allowing more changes to be made. The
toolset has an extension called the Intelligent Online Update Manager. This compares the running and
new applications and attempts to match data points and values between the two programs. This allows
updates in more cases, but cannot deal with all possible combinations of changes.
Intelligent updates are not enabled by default. It is important to enable them before commissioning a
system. The following section explains how to enable and use them.
1.1. Enabling Intelligent Online Updates
The Intelligent Update Manager is accessed from the Programs window. Select Tools – Isa.mnu –
Intelligent Update Manager as shown in Figure 1 below. Before Toolset release 3.5.1, this menu option
is called Online Update Manager.
Figure 1 Starting the Intelligent Update Manager