Dungs MPA 41 PF Series User Manual

25 … 96
24 … 96
Printed in Germany • Edition 04.18 • Nr. 271 958
Description of the functions
Unlocking function
When the MPA is locked (state 0), it can
be unlocked by pressing the unlock key.
In order to distinguish the function from
possible EMC interfering impulses, the
key must be kept depressed for at least
0.5 s (max. 5 s).
The same applies to the unlocking via
230 V and to the unlocking via eldbus
modules.
According to DIN EN 14459 (annex J),
the number of possible unlocking pro-
cesses is limited to 5 in 15 minutes, that
means the automatic system denies
further unlocking if the MPA has been
unlocked more than 5 times within a
short time period. Only after a waiting
time during which the MPA is provided
with energy is it possible to unlock the
MPA again.
The waiting time is 15 minutes or 3 min-
utes for each unlocking.
Extended unlocking
The described limitation to 5 unlocking
operations in 15 minutes can be reset
by means of "Extended unlocking". To
do this, the unlock key must be pressed
for at least 5 s (max. 10 s) (after 5 sec-
onds, the display will start ashing).
The "Extended unlocking" is active in
all operational states of the MPA, that
means that a safety shutdown with re-
start of the MPA in operation can be
carried out via the "Extended unlock-
ing" also in the presence of a ame.
The "Extended unlocking" function is
not possible via the 230V unlocking
input or the eldbus modules!
Access level
Write access to MPA is dened on dif-
ferent access levels.
Each parameter is assigned an access
level. In order to modify a parameter,
the MPA must be at the assigned or
higher level.
If the access level is not sucient to
modify a parameter, the VisionBox indi-
cates it, or a message is output on the
MPA display prompting the user to en-
ter the valid password. At higher levels,
the users must press a key to conrm
that they are "on site". The display is
ashing for 30 s until a key is pressed;
otherwise, the MPA remains in the pre-
vious level.
To change the access level, the cor-
rect password must be entered via the
display or VisionBox → MPA settings →
Access level. The access level is au-
tomatically reset after 5 hours or after
power failure. Exception: If the auto-
matic system performs a restart during
these 5 hours, for example due to an
error, these 5 hours for the current ac-
cess level are counted again from the
beginning.
NOTICE
We recommend resetting the access
level after having congured the auto-
matic system.
Level Designa-
tion
Key con-
rmation
required
1 Dungs yes
2 OEM
Expert
yes
3 OEM yes
4 Service yes
5 Operator no

Dungs MPA 41 PF Series Specifications

General

Brand	Dungs
Model	MPA 41 PF Series
Category	Control Systems
Language	English