Local Operation - Endress+Hauser Levelflex M FMP40 Operating Instructions Manual

Operation
⇒
ENDRESS + HAUSER
–
+ E
38
5.3

Local operation

5.3.1 Locking of the configuration mode
The Levelflex can be protected in two ways against unauthorized changing of device data,
numerical values or factory settings:
"Unlock Parameter" (0A4):
A value <>100 (e.g. 99) must be entered in the in the "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 locking:
The device is locked by pressing the
the display by the symbol and can only be unlocked again via the display by pressing the
S F
and keys at the same time again. It is not possible to unlock the hardware by communication
here. All parameters can be displayed even if the device is locked.
⇓
⇓
Levelflex M FMP40 with HART/4...20 mA
O S F
and and keys at the same time. The lock is shown on
O
Press and
The LOCK_SYMBOL appears on the LCD.
symbol and can be
S F
and simultaneously
Endress+Hauser
O
and