Alstom MX3EG1A - 5. LOCAL INTERFACE; 6. LCD MENU STRUCTURE; 6.1 MAIN READING MENU

pag. 13
MDE/A133 2295 001
MX3EG1A
5. LOCAL INTERFACE
K
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left and the value to change to be
selected if the settings change function
is enabled. [
ï
]
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be reset if the cause has been removed
,
or the partial counters to
be reset if they
are
in the 'display
counters' men
u.
It sets the end relays to quiescent state
when they are set to bistable operation.
K
e
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f
p
r
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2
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,
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allows the settings to be changed; when
the settings change function is enabled,
the green LED (RUN) lights up blinking.
If pressed once again for at least 2sec.,
the system goes back to normal running
conditions and, provided that a
confirmation is given, the new settings
become the current ones (the key can
only be reached by removing the cover
lid). During the settings-change
operations the device continues
working with the old settings. If the
changes made are confirmed in the
presence of a fault, the changes are
not accepted until the event is over: the
interrupt state is signalled for 3sec by a
message on the display unit, after which
you are prompted to confirm the
changes made.
If pressed when feeding the device with
auxiliary voltage until a failure message
appears on the display, this key inhibits
the device from operating.
Keys
If
simultaneous
ly
pressed
for
at
least 2sec, these keys allow the
protection Test to be carried out. When
the testing activity is enabled, the
green
LED (RUN) lights up blinking.
If simultaneously
pressed for
2 sec.
during the TEST routing, these keys
enable you to leave the protection
testing mode.
The local interface is made up
of:
-
a LCD di
splay u
nit or
ganiz
ed on t
wo line
s of six
teen c
hara
cters
each.
Through a special
keyboard-con
trolled scanning, the display
unit enables the settings to be read and changed, the
measurements, the counters, the logged events and the
diagnostic information to be read.
-
A
keyb
oard
made
up o
f si
x ke
ys,
five
of w
hich
can
even
be
reached when the cover lid is
fitted through a special link.
In addition to the above-mentioned scanning, the keyboard is
also used to change the settings, carry out tests that
require
commands to be sent and stored indic
ations to be set to zero;
the keys that can be reached when the cover lid is fitted only
allow for read-out and reset
operations.
Key
It
allows
the
menu
to
be
scrolled
upwards or the value to be increased if
the settings change function is enabled.
[
ñ
]
Key
It
allows
the
menu
to
be
scrolled
downwards or the value to be
decreased if the settings change
function is enabled. [
ò
]
Key
It
allows
the
menu
to
be
scrolled
to
the
right or the value to change to be
selected if the settings change function
is enabled.[
ð
]