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Instruction Manual
IM-106-880C, OI
September 2009
7-9
Hazardous Area OCX 8800
NV Memory
Failure
Transducer
Block:
EEPROM
Corrupt
Resource Block:
1) Manufacturing
2) Block Integrity
Error
3) NV Integrity
Error
4) ROM Integrity
Error
FF/
Device
Alerts
The non-volatile
parameter
storage on the
CPU board has
become
unreliable.
At startup, wait 2
minutes with power
applied and then
cycle power again or
reset device.
This alarm will generally occur during a startup
condition. Rarely, the device could be powered
down while a parameter is being stored to the
non-volatile memory. The parameter will then be
tagged as bad on the 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: Troubleshooting for details.
NV Writes
Deferred
Resource Block:
1) NV Writes
Deferred
FF/
Device
Alerts
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.
High Electronics
Temp-
erature
Transducer
Block:
High Electronic
Temperature
Device
Alerts
This alert
indicates that the
electronics
temperature has
exceeded 80
°C.
The device will
cease to operate
reliably beyond
85
°C.
Evaluate mounting
location and
environment.
The device may require special mounting
considerations if installed in a very hot location.
ADC Failure Transducer
Block:
1) ADC Timeout
Error
2) ADC
Reference
Error
Device
Alerts
This alert
indicates faulty
operation of the
device
electronics.
Cycle power or
replace the
electronics stack.
The Analog to Digital Converter (ADC) is
continuously monitored by the device for correct
operation. Refer to Section 8: Troubleshooting for
details.
Alerts Alarms
AMS
Tab
What does the
alert indicate?
Recommended
Action
Description