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Configuring the Island Bus
890USE17700 April 2004 57
Overwriting
Flash Memory
with Factory
Default Values
The following procedure describes how to use the RST function to write default
configuration data to Flash memory. Follow this procedure if you want to restore
default settings to an island. This is also the procedure to use to update the
configuration data in Flash memory after you add an I/O module to a previously
auto-configured island bus. Because this procedure will overwrite the configuration
data, you may want to save your existing island configuration data to a removable
memory card before pushing the RST button.
The Role of the
NIM in this
Process
The NIM reconfigures the island bus with default parameters as follows:
Step Action
1 If you have a removable memory card installed, remove it (See Removing the
Card, p. 52).
2 Ensure that your island is in edit mode.
3 Hold the RST button (See The RST Button, p. 55) down for at least two seconds.
Stage Description
1 The NIM auto-addresses (See Auto-Addressing, p. 46) the I/O modules on the
island and derives their factory-default configuration values.
2 The NIM overwrites the current configuration in Flash memory with configuration
data that uses the factory-default values for the I/O modules.
3 It resets the communication parameters on its CFG port to their factory-default
values (See Port Parameters, p. 33).
4 It re-initializes the island bus and brings it into operational mode.