Endress+Hauser Fieldbus Levelflex M FMP43 Operating Instructions Manual page 36

Operation
⇒
ENDRESS + HAUSER
– +
E
"
36
5.3.2 Unlocking the configuration mode
If an attempt is made to change parameters when the device is locked, the user is automatically
requested to unlock the device:
"unlock parameter" (0A4):
By entering the release code (on the display or via communication)
2457 = for FOUNDATION Fieldbus devices
the Levelflex is released for operation.
Hardware unlocking:
O S
After pressing the and
2457 = for FOUNDATION Fieldbus devices
⇓
⇓
Caution!
Changing certain parameters such as all sensor characteristics, for example, influences numerous
functions of the entire measuring system, particularly measuring accuracy. There is no need to
change these parameters under normal circumstances and consequently, they are protected by a
special code known only to the Endress+Hauser service organization. Please contact
Endress+Hauser if you have any questions.
Levelflex M FMP43 with FOUNDATION Fieldbus
F
and keys at the same time, the user is asked to enter the release code
Press
O
Please enter release code and confirm with
S F
and and simultaneously
Endress+Hauser
F
.