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 Diagnostic alarms for details.
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. This alert indicates that the electronics temperature has exceeded
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 Diagnostic alarms for details.
Recommended actions
1. Cycle power.
Manual
FOUNDATION
™
Fieldbus
00809-0500-4880 December 2022
Rosemount OCX8800A 125
To Next Page
Loading...
