Local Operation - Endress+Hauser Levelflex M FMP45 Operating Instructions Manual

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 instrument data,
numerical values or factory settings:
"unlock parameter" (0A4):
A value <> 100 (e.g. 99) must be entered in "unlock parameter" (0A4) in the
"diagnostics" (0A) function group. The lock is shown on the display by the
released again either via the display or by communication.
Hardware lock:
The instrument is locked by pressing the
on the display by the symbol and can only be unlocked again
via the display by pressing the
unlock the hardware by communication. All parameters can be displayed even if the instrument is
locked.
⇓
⇓
Levelflex M FMP45 with HART/4...20 mA
O S F
and and
O S F
and and keys at the same time again. It is not possible to
O
and
The LOCK_SYMBOL appears on the LCD.
symbol and can be
keys at the same time. The lock is shown
S F
and press simultaneous
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