GS_GSR_GCR_UserManual_V21.doc / 18.09.2009
GeoSIG Ltd.
GSR / GCR / AS User Manual
Page 23
The
EE_RAM Checksum
test reads the Instrument parameters stored within a copy of the EEPROM
and calculates its Checksum. Is a working copy of the internal EEPROM, used during run-time to
increase speed and reliability. An incorrect checksum yields a
Warning
.
▪
A data corruption has probably occurred in the EEPROM. Run the Self Test again to see if the
Warning flag remains set. Check if all configured parameters are set as required and reset the
Instrument by flipping the Main Switch to OFF and to ON again. Clear the Warning Flag and run
the Self Test again.
The
Invalid Instruction
test monitors the operation of the microprocessor whether an attempt is made
to execute an instruction with an undefined operation code or illegal addressing mode specification.
Failing the test yields a
Warning
.
▪
Reset the Instrument by flipping the Main Switch to OFF and to ON again. Clear the Warning
Flag and run the Self Test again.
The
Address Error
test monitors the operation of the microprocessor, whether an attempt has been
made to pre-fetch an instruction from an illegal address or word access to an odd address. Failing the
test yields a
Warning
.
▪
Reset the Instrument by flipping the Main Switch to OFF and to ON again. Clear the Warning
Flag and run the Self Test again.
The
Stack Monitor
test monitors the microprocessor run time stack. An overflow of the stack yields a
Warning
.
▪
Reset the Instrument by flipping the Main Switch to OFF and to ON again. Clear the Warning
Flag and run the Self Test again.
The
Divide by Zero Interrupt
test fails whether the microprocessor has attempted a mathematical
divide by zero. In this case a
Warning
appears.
▪
Reset the Instrument by switching the Main Switch to OFF and to ON again. Clear the Warning
Flag and run the Self Test again.
The
Unexpected Interrupt
test monitors all unused interrupts of the microprocessor. If an unexpected
interrupt occurs a
Warning
appears.
▪
Reset the Instrument by flipping the Main Switch to OFF and to ON again. Clear the Warning
Flag and run the Self Test again.
6.1.3. Real Time Clock RTC
If "RTC" is selected, the following test routines will be performed:
The
Valid Time and Date
test reads the time and date stored within the internal Real Time Clock. If its
contents correspond to an invalid time or date, a
Warning
appears.
▪
Check Time and Date of the Instrument and reset it to the current Time and Date. Run the Self
Test again.
The
Time Increment
test
reads the time and date stored within the internal Real Time Clock waits for
1 second and then reads it again. If the time has not incremented over this period, a
Warning
appears.
▪
Check Time and Date of the Instrument and reset it to the current Time and Date. Run the Self
Test again.
