Att error status conditions, 3 troubleshooting – Varec 4000 User Manual
Page 38
Maintenance and Troubleshooting
Tank Gauge Transmitter
28
Installation and Operations Manual
4.3
Troubleshooting
The ATT has provisions for hardware alarm inputs, software generated setpoint alarms, and other alarm conditions.
Alarm and error status conditions are available to the Model 1200, to the host Computer, and to the optional ATT
display. When in the Model 1200 display mode, the Diagnostic Status Menu displays only active alarm and error status
conditions. General status conditions such as HW IN 1 are always displayed.
4.3.1
ATT Error Status Conditions
Error Message
Description
BAD COMM BOARD
The communication board did not pass the loopback test. See
the description of the host communication loop-back tests.
BAD CPU BOARD
RAM, EPROM, or EEPROM has failed.
BAD EEPROM CHECKSUM
The EEPROM configuration data did not match the EEPROM
stored checksum. Examine all configuration parameters, make
any changes, and then use the "EXIT AND SAVE" option under
the Main Menu.
BAD EEPROM
The value written to EEPROM memory did not match the value
read back from EEPROM memory. This is a critical alarm.
Contact the factory.
BAD EPROM
The program EPROMs have failed the EPROM test. This is a
critical alarm. Contact the factory.
BAD LEVEL
The level input is invalid.
BAD RAM
The RAM has failed the RAM test. This is a critical alarm.
Contact the factory.
BAD RTD RESISTANCE
The ATT detected an invalid RTD resistance. Usually due to an
open or shorted RTD input.
BAD TEMP
The ATT detected an invalid temperature. Usually due to an
RTD failure.
CALC ERROR
Calculation overflow or divide by zero error.
CONFIG ERROR
See the ATT configuration error checking in this section.
LOW BATTERY
The battery used to maintain the encoder circuitry has a low
voltage.
NO CALC ERROR
The ATT can no longer perform calculation. See information
under the Stop Calculations Conditions section.
OFFLINE MODE
A Model 1200 is connected to the ATT at tank side. No ATTI
Bus sensor communication is active.
RTD UNCOVERED
The Resistive Temperature Device (RTD) sensor is uncovered.