Dwyer UXF3 - Manual (Page 19)

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5.7 FIX Processing (Cautions in data write)
The instrument is provided inside with a non-volatile memory (Fe-RAM) for holding the setting parameters.
Data written in the non-volatile memory is not lost even if turning off the power.
To hold parameters that were written in the internal memory via communication after turning off the power, the FIX
process is effective. It allows parameters to be written in nonvolatile memory.
Fig.5-4 shows the FIX procedure.
Cautions:
ƒ Write in the non-volatile memory takes approximately 2 seconds.
ƒ While writing, do not turn off the power of the UXF3. Otherwise, the data in the non-volatile memory will be
destroyed, whereby the UXF3 could not be used any longer.
ƒ Don’t change parameters on the front panel when performing the FIX procedure, or memory error may result.
ƒ Therefore, limit the times of change of parameter setting to absolute minimum. Refrain from carrying out
the FIX processing periodically for example or while such is not absolutely required.
Start FIX
Read the FIX data
with function code
: 03
H
relative address : 0150
H
FIX=0?
Write ‘1’ into FIX data
with function code
: 06
H
relative address : 0150
H
Read the FIX data
with function code
: 03
H
relative address : 0150
H
FIX=0?
End FIX
No
Yes
No
Yes
Fig.5-4 FIX procedure
Bulletin F-107-UXF3-S