pag. 11
MDE/C133 2561 001
MX3IPG2A
4.11 Language
The device can display information in four languages: Italian,
English, French and Spanish. The language can be selected
through the keyboard.
4.12 LCD settings
The display can be set for fixed (OFF) or timed (ON) back-
lighting; in the last case, the display lights up for 300s any time
a key is pressed .
4.13 Inhibiting operation - Deconfiguration via network
Inhibiting the device is required in operating plants, to avoid
inefficiency on feeding a protection whose settings are un-
known or need to be changed.
The inhibition is performed by holding the settings change
button pressed for about 2 s,while injecting the auxiliary
voltage until the following message is displayed:
[ BLOC ]
[ ]
On releasing the push-button, the condition of inhibited device
is signalled by a diagnostic message of P fault.
The normal operating conditions can only be restored by
moving to the settings change function, which is enabled at all
events; a temporary loss of the auxiliary voltage supply does
not affect the inhibited state of the device.
If the device is also equipped with a field-bus board, by holding
the settings change push-button further pressed for about 2s,
in the BLOC state, the device will display:
[ NET RESET ? ]
[_ NO YES _]
if a confirmation is provided, the device can also be made lose
its network configuration.
The full procedure for inhibiting and de-configuring the device
via network must be enacted any time you need to replace the
unit.
By resetting an inhibited and deconfigured unit, a K fault
message is displayed and remains displayed until the unit is
configured anew.
Operation can only be reset by moving to the settings change
function, which is enabled in any case.
fig. 2
RELAY
FRONT
TOP SIDE
BOARD
NOT
ENABLE
BOARD
ENABLE
A-A VIEW
A-A VIEW
A-A VIEW
I
CAUTION
Hazardous voltages can remain in the device even when
the latter has been de-energized or pulled out of its casing
(condenser memory).
4.14 Serial communication on LONWORKS
(TM)
bus
The device, in the version including the special bus board, can
communicate with a central monitoring and control system at
a speed equalling 1.2 5 Mbaud. The connection to the field bus
is made through terminals: 43 and 45.
The communication board, which can be also added later, is
only enabled if the special S6 jumper is correctly connected,
while it is not in the case the jump is connected in vertical
position across S5 and S6 (see fig. 2).
If the S6 jumper is connected when the communication board
is not present, the diagnostic function displays a message of
failure, behaving as if the board was present and faulty.
Appendix A lists the parameters available for the network.