GE 745 - Page 234

6–26 745 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
TARGET AND FLASH MESSAGES CHAPTER 6: ACTUAL VALUES
EEPROM Memory Self-Test Warning 2
Replace Immediately
Major This error is caused by detection of
corrupted location in the 745 data
memory which cannot be self-
corrected. Errors that can be
automatically corrected are not
indicated. Any function of the 745 is
susceptible to maloperate from this
failure.
Clock Not Set Clock Not Set
Program Date/Time
Minor This error is caused when the 745
detects that the real-time clock is
not running. Under this condition,
the 745 will not be able to maintain
the current time and date. This
would normally occur if backup
power for the clock is lost and
control power is removed from the
745. Even if control power is
restored, the clock will not operate
until the time and/or date are
programmed via the
S1 745 SETUP
 CLOCK menu.
Emulation Software Self-Test Warning 4
Replace Immediately
Minor This error is caused by development
software being loaded in the relay.
Int Temperature Unit Temp. Exceeded
ServiceCheckAmbient
Minor The relay has detected an
unacceptably low
(< –40ªC) or high (> 85°C)
temperature inside the unit.
Flexlogic Equation Flexlogic Eqn Error
Consult User Manual
Major This error is caused when an error in
FlexLogic™ is detected. No feature of
the 745 that is controlled by
FlexLogic will operate when this
failure occurs.
Programming correct FlexLogic
equations will remove this error.
DSP Processor Self-Test Warning 6
Replace Immediately
Major This error is caused when
communications with the internal
digital signal processor is lost. Most
of the monitoring capability of the
745 (including all measurement of
current) will be lost when this failure
occurs.
Bad Xfmr Settings Bad Xfmr Settings
Consult User Manual
Major This error is caused when the 745
determines that the transformer
configuration programmed via
setpoints does not correspond to a
realistic physical system.
IRIG-B Signal IRIG-B Error
Consult User Manual
Minor This error is caused when the IRIG-B
signal type selected does not match
the format code being injected into
the IRIG-B terminals.
Setpt Access Denied Setpoint Access Denied
Consult User Manual
Minor This error is caused when the
passcode is entered incorrectly three
times in a row from either the front
panel or any of the communication
ports. This error may be removed by
entering the correct passcode.
Ambient Temperature Amb. Temp. Exceeded
Check Ambient
Minor This error is caused when ambient
temperature is out of range.(–50 to
250°C inclusive).
Self-Test Warning 7 Self-Test Warning 7
Call Service
Minor This warning is caused by 745
microprocessor reset forced by
watchdog circuit.
Table 6–4: Self-test error interpretation (Continued)
Event message Target message Severity Cause