Local Operation - Endress+Hauser Fieldbus levelflex M FMP 40 Operating Instructions Manual

5 Operation
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5.3

Local operation

5.3.1 Locking of the configuration mode
The Levelflex can be protected in two ways against unauthorised changing of instru-
ment data, numerical values or factory settings:
"unlock parameter" (0A4):
A value <> 2457 (e.g. 2456) must be entered in "unlock parameter" (0A4) in the
"diagnostics" (0A) function group. The lock is shown on the display by the
and can be released again either via the display or by communication.
Hardware lock:
The instrument is locked by pressing the
The lock is shown on the display by the
via the display by pressing the
possible to unlock the hardware by communication.
All parameters can de displayed even if the instrument is locked.
⇓
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Levelflex M FMP 40 with Foundation Fieldbus
O S F
and and
symbol and can only be unlocked again
O S F
keys at the same time again. It is not
and and
O S
and
The LOCK_SYMBOL appears on the LCD.
symbol
keys at the same time.
F
and press simultaneous
Endress+Hauser