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NC20 - Manual - 01 - 2015
SETTING AND COMMISSIONING
7.2
MMI (Man Machine Interface)
On the front panel there are eight buttons which allow the user to perform all the settings, reading
and modifi cation operations.
[1]
The adjustment of the settings and the operation mode of the output relays must be performed while
the unit is electrically powered; the alphanumeric display shows the necessary information with
reference to the operations performed through the keyboard. One minute after the keyboard is not
more in use, the display backlight switches automatically to OFF.
All preset values are permanently stored in the nonvolatile memory.
The buttons take the following operations:
-
(Up) move the cursor upwards to the preceding menu options
-
(Down) move the cursor downwards to the subsequent menu options
-
(Left) move the cursor upwards to the preceding menu options
-
(Right) move the cursor downwards to the subsequent menu options
-
(Enter) access to the selected menu with the option of modifying any given parameter
-
(Reset) abort the current changes and/or accessing the previous menu
-
Circuit breaker Open command
-
Circuit breaker Close command
At power-up, the display shows the text:
“THYTRONIC
PRO-NC20-xxx-x serial number
date and time: (01/01/2000 00:00”
The ON green Led points out the auxiliary power supply voltage (permanent lighted) and possible
faults (blink lighted).
The display backlight is automatically activated when any key switch is set.
By means of the
(Up) or
(Down) buttons, it is possible to cyclically browse through the menu op-
tions:
READ, SET, COMMUNICATION, TEST
Having identifi ed the sub-menu of interest, it is possible to gain access by using the
(Right) button
and then analogously, run through the relevant options by using the
(Up) or
(Down) buttons.
The full menu tree and some examples are showed in the following pages (numerical values and
settings are pointed out as examples and does not agree with real situations).
Reading variables (READ)
All data (measure, settings, parameters, etc...) can be displayed; they are arranged in functional
group submenus:
“READ
>>”
“SERIAL NUMBER
>>”
“
INFO
>>
”
“
MEASURES
>>
”
“
ACTIVE PROFILE
>>
”
“
PROTECTIONS
>>
”
“
PLC
>>
”
“
CIRCUIT BREAKER SUPERVISION
>>
”
“
DELAYED INPUTS
>>
”
“
INTERNAL STATES
>>
”
“
RELAYS
>>
”
“
PARTIAL COUNTERS
>>
”
“
TOTAL COUNTERS
>>
”
“
SELF-TEST
>>
”
“
PILOT WIRE DIAGNOSTIC
>>
”
“
SELECTIVE BLOCK BLOCK2
>>
”
“
INTERNAL SELECTIVE BLOCK BLOCK4>>
”
Note 1 Setting changes are enabled when the
Enabling setting by MMI
parameter is set
OPEN CB
LEDs
CLOSE CB
OPEN CB
LEDs
CLOSE CB
