GE Multilin 489 Instruction Manual page 94

CHAPTER 4: INTERFACES
When communications is established, the saved setpoints must be reloaded back into the
relay. See Loading Setpoints from a File on page 4–28 for details.
Modbus addresses assigned to firmware modules, features, settings, and corresponding
data items (i.e. default values, min/max values, data type, and item size) may change
slightly from version to version of firmware.
The addresses are rearranged when new features are added or existing features are
enhanced or modified. The message displayed after upgrading/
EEPROM DATA ERROR
downgrading the firmware is a resettable, self-test message intended to inform users that
the Modbus addresses have changed with the upgraded firmware. This message does not
signal any problems when appearing after firmware upgrades.
4–32 489 GENERATOR MANAGEMENT RELAY – INSTRUCTION MANUAL
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