Functional description
21
VMD460-NA_D00001_05_M_XXEN/01.2020
3.5.1.2
Two-stage password protection
(system and standard password)
An additional "standard" password is available for VDE-AR-N 4105:2018-11 (4105_2).
The "system" password is generally requested during/before parameter
input
. If the en-
try of a parameter is confirmed when the "standard" password is set, the rights are
checked again and, if necessary, the "standard" password has to be entered. The param-
eters of the standards in the "Settings" menu can be viewed when the "standard" pass-
word is set, but can only be changed to a limited extent. History memory: The last 300
network faults can be called up with time stamp/real-time clock.
3.5.2
Protection against unauthorised access - sealable enclosure
The VMD460-NA can be sealed to prevent or detect unauthorised access.
3.5.3
Reset device to factory settings
Menu: 4. System -> 12. Factory settings
Via this menu, the device can be reset to the factory settings.
3.5.4
History memory of the last 300 faults
with time stamp (real-time clock)
Menu: 2. History
The history memory saves up to 300 events (alarms, tests) with information
on messages (e.g. event code and/or measured value), acknowledgements and the cor-
responding date and time. If the history memory is full, the oldest entry will be deleted
in the event of an alarm to make space for the new entry (FIFO principle).
The history memory can be deleted or reset in the menu: 4. System -> 1. History.
In general,
no
changes can be made to parameters of the standard (set-
tings) on this access level if the "standard" password is set. The following
parameters are
exceptions
according to the VDE-AR-N 4105:2018-11
standard: response value "U>" (profiles 1…3), and response delays "t
off
U<
"
and "t
off U<<
" (profile 2 only).
