Schneider Electric 890USE17700 - Manual (Page 56)

Configuring the Island Bus
56 890USE17700 April 2004
RST Functionality
Introduction The RST function allows you to reconfigure the operating parameters and values of
an island by overwriting the current configuration in Flash memory. RST functionality
affects the configuration values associated with the I/O modules on the island, the
operational mode of the island, and the CFG port parameters.
The RST function is performed by holding down the RST button (See The RST
Button, p. 55) for at least two seconds. The RST button is enabled only in edit mode.
In protected mode (See Protecting Configuration Data, p. 164), the RST button is
disabled; pressing it has no effect.
RST
Configuration
Scenarios The following scenarios describe some of the ways that you can use the RST
function to configure your island:
z Restore factory-default parameters and values to an island, including to the I/O
modules and the CFG port (See Port Parameters, p. 33).
z Add a new I/O module to a previously auto-configured (See Auto-Configuration,
p. 49) island.
If a new I/O module is added to the island, pressing the RST button will force the
auto-configuration process. The updated island configuration data is
automatically written to Flash memory.
Note: Network settings, such as the fieldbus baud and the fieldbus node ID, remain
unaffected.
CAUTION
UNINTENDED EQUIPMENT OPERATION/CONFIGURATION DATA
OVERWRITTEN—RST BUTTON
Do not attempt to restart the island by pushing the RST button. Pushing
the RST button (See The RST Button, p. 55) causes the island bus to
reconfigure itself with factory default operating parameters.
Failure to follow this precaution can result in injury or equipment
damage.