MAN0878-09-EN_XLE_XLT_UserManual
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CHAPTER 16: FAIL – SAFE SYSTEM
16.1 Overview
The Fail-Safe System is a set of features that allows an application to continue running in the
event of certain types of "soft" failures. These "soft" failures include:
• Battery power loss
• Battery-Backed Register RAM or Application Flash corruption due to, for example, an
excessive EMI event.
The Fail-Safe System has the following capabilities:
• Manually backup the current Battery-Backed RAM Register Settings into Flash
memory.
• Manually restore Register Settings from the values previously backed up in Flash to
Battery-Backed RAM.
• Detect corrupted Register Settings at power-up and then automatically restore them
from Flash.
• Detect corrupted or empty application in Flash memory at power-up and then
automatically load the AUTOLOAD.PGM application file from Removable Media
(Compact Flash or microSD).
• If an automatic Register Restore or Application Load occurs, the OCS can
automatically be placed in RUN mode
The fail-safe system can be accessed through the system menu of the controller. A new menu
“Fail-Safe System” has been added at the end of the main system menu for this. Selecting “Fail-
Safe System” menu will open the following menu screen:
XLT:
XLE:
Figure 16.1– Fail Safe System Menu
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