Emerson Rosemount OCX8800 Instruction Manual page 124

Section 7: Foundation
Fieldbus
April 2017
Alerts Alarms
Calibration Transducer
Recommended Block:
Calibration
Recommende
d
Transducer
NV Memory
Block:
Failure
EEPROM
Corrupt
Resource
Block:
1)
Manufacturing
2) Block
Integrity Error
3) NV Integrity
Error
4) ROM
Integrity Error
Resource
NV Writes
Block:
Deferred
1) NV Writes
Deferred
High
Transducer
Electronics
Block:
Temp-
erature
High Electronic
Temperature
ADC Failure Transducer
Block:
1) ADC
Timeout Error
2) ADC
Reference Error
98
What does
the alert
AMS
Tab indicate?
Calib- This alert
ration indicates that
Alerts the sensor
resistance has
changed by a
predetermined
amount since
the last
calibration.
FF/ The non-
Device volatile
Alerts parameter
storage on the
CPU board has
become
unreliable.
FF/
Device
Alerts
Device This alert
Alerts indicates that
the electronics
temperature
has exceeded
80°C. The
device will
cease to
operatereliably
beyond 85°C.
Device This alert
Alerts indicates faulty
operation of
the device
electronics.
Recommended
Action Description
Check instrument Oxygen cells will degrade over time due to
accuracy and/or aging and corrosion. An increasing cell
calibrate. resistance is a good indicator of reduced cell
performance. As the cell impedance
increases, the cell output falls off and
response time increases. Calibrating the
instrument will compensate for the increased
cell resistance. If using the device with an
IMPS or SPS calibration sequencer, increased
cell impedance can automatically trigger a
calibration.
At startup, wait 2 This alarm will generally occur during a
minutes with startup condition. Rarely, the device could be
power applied and powered down while a parameter is being
then cycle power stored to the non-volatile memory. The
again or reset parameter will then be tagged as bad on the
device. next power on and the memory contents will
be written with default parameters.
Calibration data may be lost and the unit
should be recalibrated. If the unit does not
recover automatically, the memory may be
faulty and the electronics stack should be
replaced. Refer to Section 8, Overview page
165 for details.
A high number of writes has been detected
to non-volatile memory. To prevent
premature failure of the memory, the write
operations have been deferred. The data will
be saved on a 6 hour cycle. This condition
usually exists because a program has been
written that writes to Function block
parameters not normally expected to be
written to on a cyclic basis.
Evaluate The device may require special mounting
mounting considerations if installed in a very hot
location and location.
environment.
Cycle power or The Analog to Digital Converter (ADC) is
replace the continuously monitored by the device for
electronics stack. correct operation. Refer to Section 8,
Overview page 165 for details.
Instruction Manual
IM-106-880C, OI
Mapping of
PWA