Reference Manual
00809-0100-4860, Rev BF
Troubleshooting
May 2019
68
Rosemount 8600 Vortex Flow Meter
DIGITAL FILTER ERROR The digital filter in the transmitter electronics is not reporting. The transmitter will
remain in ALARM until the digital signal processor resumes reporting flow data.
COPROCESSOR ERROR If this occurs at power-up, the RAM/ROM test in the coprocessor has failed. If this
occurs during normal operations, the coprocessor has reported either a math error
or a negative flow. This is a FATAL error and the transmitter will remain in ALARM
until reset.
SOFTWARE DETECTED ERROR The software has detected corrupted memory. One or more of the software tasks
has corrupted memory. This is a FATAL error and the transmitter will remain in
ALARM until reset.
ELECTRONICS FAILURE This is a summary error indication. This error will be reported if any of the following
error conditions are present:
1. ROM Checksum Error
2. NV Memory Checksum Error
3. RAM Test Error
4. ASIC Interrupt Error
5. Digital FIlter Error
6. Coprocessor Error
7. Software Detected Error
TRIGGER LEVEL OVERRANGE The trigger level in the transmitter digital signal processing has been set beyond its
limit. Use manual filter adjustment to “Increase Filtering” or “Increase Sensitivity” to
bring the trigger level back within range.
LOW PASS FILT OVERRANGE The low pass filter in the transmitter digital signal processing has been set beyond its
limit. Use manual filter adjustment to “Increase Filtering” or “Increase Sensitivity” to
bring the low pass filter adjustment back within range.
ELECTRONICS TEMP OUT OF LIMITS The electronics temperature sensor within the transmitter is reporting a value out of
range.
INVALID CONFIGURATION Certain configuration parameters are out of range. Either they have not been
properly configured, or they have been forced out of range as a result of a change to
a related parameter. For example: When using mass flow units, changing the
process density to a value too low could push the configured Upper Range Value
beyond the sensor limit. In this case, the Upper Range Value would need to be
reconfigured.
FACTORY EEPROM
CONFIG ERROR
The factory configured values in non-volatile EEPROM memory have become
corrupted. This is a FATAL error. The transmitter will remain in ALARM until reset.
LOW FLOW CUTOFF OVERRANGE On start-up, the configured setting for the VDSP Low Flow Cutoff setting was found
to be too high or too low. The increase range or decrease no flow noise command of
the VDSP Low Flow Cutoff setting has not yet brought the setting into a valid range.
Continue adjusting the Low Flow Cutoff to a valid value or use the Filter Restore
Option.
T/C A/D ERROR The ASIC responsible for the analog to digital conversion of the process temperature
thermocouple and cold junction RTD has failed. If the problem persists, replace the
transmitter electronics.
THERMOCOUPLE OPEN The thermocouple that is used to measure the process temperature has failed.
Check the connections to the transmitter electronics. If the problem persists,
replace the thermocouple.
CJ RTD FAILURE The RTD temperature sensing device for sensing the cold junction temperature has
failed. If the problem persists, replace the transmitter electronics.
FLOW SIMULATION The transmitter flow signal is being simulated by a signal generator internal to the
transmitter. The actual flow through the meter body is NOT being measured.
SENSOR SIGNAL IGNORED The transmitter flow signal is being simulated by a signal generator external to the
transmitter. The actual flow through the meter body is NOT being measured.
LOW LOOP VOLTAGE The voltage at the transmitter terminals has dropped to a level that is causing the
internal voltage supplies to drop, reducing the capability of the transmitter to
accurately measure a flow signal. Check the terminal voltage and either increase the
power supply voltage or reduce loop resistance.
INTERNAL COMM FAULT After several attempts, the microprocessor failed in communication with the
Sigma-Delta ASIC. A power cycle may resolve the problem. Also, check the
inter-board connector. If the problem persists, replace the transmitter electronics.
Message Description
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