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Manual
00809-0500-4880
parameter is then tagged as bad on the next power on, and the memory contents
are written with default parameters. Calibration data may be lost; recalibrate the
transmitter. If the transmitter does not recover automatically, the memory may
be faulty. Refer to
Recommended action
At start-up, wait two minutes with power applied and then cycle power again
or reset the transmitter.
NV Writes Deferred
The FF/Device Alerts tab or the resource block may display the following alarm: NV
Writes Deferred
Potential cause
A high number of writes has been detected to non-volatile memoery. To prevent
premature memory failure, the write operation has been deferred. The data is
saved on a six-hour cycle. This condition usually exists because a program has
been written that writes to function block parameters not normally expected to
be written on a cyclic basis.
High Electronics Temperature
The Device Alerts tab or the transducer block may display: High Electronic
Temperature
176 °F (80 °C). The transmitter will case to operate reliably above 185 °F (85 °C).
Potential cause
The transmitter may require special mounting considerations if installed in a very
hot location.
Recommended action
Evaluate mounting location and environment.
ADC Failure
The Device Alerts AMS tab or the transducer block may display one of the
following alerts:
1. ADC Timeout Error
2. ADC Reference Error
This alert indicates faulty operation of the device electronics.
Potential cuase
The transmitter continually monitors the analog to digital converter (ADC) for
correc operation. Refer to
Recommended actions
Rosemount OCX8800A
Diagnostic alarms
.
. This alert indicates that the electronics temperature has exceeded
Diagnostic alarms
1. Cycle power.
for details.
for details.
F
Fieldbus
™
OUNDATION
December 2022
125
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