GE Multilin 745

Target and Flash Messages745
Transformer Management Relay
Actual Values
http://www.GEindustrial.com/multilin
6–20
GE Multilin
All conditions listed in the following table cause a target message to be generated.
Table 6–3: Self-Test Error Interpretation
Message Severity Cause
EEPROM Memory 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.
Flexlogic Eqn 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 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 Major This error is caused when the 745 determines that
the transformer configuration programmed via
setpoints does not correspond to a realistic physical
system.
Logic Power Out Minor This error is caused by failure of the +32 V DC
power supply used to power dry contacts of logic
inputs. Logic inputs using internal power are
affected by this failure. This may be caused by an
external connection which shorts this power supply
to ground.
Analog Output Minor This error is caused by failure of the +32 V DC
power supply used to power analog outputs. Analog
output currents are affected by this failure.
Not Calibrated Minor This error message appears when the 745
determines that it has not been calibrated.
Although the relay is fully functional, the accuracy
of measured input values (e.g. currents and line
voltage) as well as generated outputs (e.g. analog
outputs) is not likely to be within those specified for
the relay.
Real-Time Clock 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
battery 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 Minor This error is caused by development software being
loaded in the relay.
Int Temperature Minor This error is caused by the detection of
unacceptably low (less than –40°C) or high
(greater than +85°C) temperatures detected inside
the unit
IRIG-B Failure 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.
Access Denied 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.
Ambnt temperature Minor This error is caused when ambient temperature is
out of range.(–50 to 250°C inclusive).