ABB 266 MODBUS User Manual page 80

Diagnostic code Possible Cause
—
Process Temperature Out
—
of Limits
—
The measuring cell signal is not updated correctly
due to an electronics error, a measuring cell error or
a poorly connected measuring cell cable.
The turn-stop has been disengaged, allowing the
Sensor Invalid
housing to be rotated more than one revolution. This
can dislodge the ribbon cable inside of the housing.
The model or version of the measuring cell is no
longer compatible with the connected version of the
electronics.
Sensor Memory Fail Measuring cell memory damaged
NV Sensor Memory Burn Writing to non-volatile memory of the measuring cell
Error was not successful.
Data exchange between measuring cell and
Electronic Interface Error
electronics is faulty.
Electronic Memory
Electronic memory is damaged
Failure
NV Electronic Memory
Writing to non-volatile memory was not successful.
Burn Error
The static pressure of the process exceeds the
Max Working Pressure
maximum permissible working pressure (operating
Exceeded
pressure, not burst pressure) for the transmitter.
This effect may have been induced by other devices
in the process (valves, etc.).
A pressure range overshoot, on either the DP or SP
Pressure Over range
side, can result in reduced accuracy or mechanical
damage of the diaphragm material and can make
calibration or replacement necessary.
Electronic Temperature The measurement cell's circuit board has had a
Out of Limits catastrophic failure on the micro-controller.
The electronics module has been replaced, but
Replace Info
replacement mode has not been executed.
72 | 266 MODBUS® multivariable transmitter User manual 2105216 Rev. AB
Incorrect RTD wiring
Wire break
Deviating process conditions
Recommended action
—
Verify that the RTD is properly wired to the
transmitter (go to section 3.6.4, Transmitter
wiring). Rewire if necessary.
—
Use the procedure in section 5.10, RTD wiring
verification, to determine if the RTD to
transmitter cable is damaged or requires
replacement.
— ®
Use the MODBUS registers to view the
customer set maximum and minimum values
(5549 through 5556) are set inside of the
normal process operational boundaries. It may
be necessary to replace the RTD or change the
operational limits.
Verify the measurement assembly ribbon cable is
correctly connected to the back of the electronics
module.
Disengaging the turn-stop voids the warranty. Replace
®
the 266 MODBUS multivariable transmitter.
The measuring cell is not field replaceable. Replace the
®
266 MODBUS multivariable transmitter.
The measuring cell is not field replaceable. Replace the
®
266 MODBUS multivariable transmitter.
The measuring cell is not field replaceable. Replace the
®
266 MODBUS multivariable transmitter.
Remove power from transmitter, then restore. If the
error persists, replace the transmitter's electronics
module (go to section 5.6, Replacing the electronics
module)
Replace the transmitter's electronics module (go to
section 5.6, Replacing the electronics module).
Replace the transmitter's electronics module (go to
section 5.6, Replacing the electronics module).
®
Use the MODBUS registers to view the SP maximum
ever measured value and the SP minimum ever
measured value. Determine whether the pressure
transmitter is suitable for the process conditions. It is
possible that a different transmitter type is required.
If necessary, replace the 266 MODBUS
transmitter.
®
Use the MODBUS registers to view the SP maximum
ever measured value, the SP minimum ever measured
value, DP maximum ever measured value, and the DP
minimum ever measured value Determine whether the
pressure transmitter is suitable for the process
conditions. It is possible that a different transmitter type
is required.
If necessary, replace the 266 MODBUS
transmitter.
The measuring cell circuit board is not field replaceable.
®
Replace the 266 MODBUS multivariable transmitter.
It is likely that additional error codes may also be
present along with this code.
Complete the remaining instructions in section 5.6,
Replacing the electronics module, beginning with step
8, Uploading the device configuration. This will upload
the configuration files into the new electronics module.
6 Troubleshooting
®
multivariable
®
multivariable