NCT Group NCT 990T - Manual (Page 13)

1 Operator’s Panel
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the operator’s messages of PLC are displayed. The date and time display can also be found in
this line.
In the third line the name of the active general displaying area and behind the number of
programs indicated for running can be read. In case of manual data input mode, the number
of programs belonging to the manual data input can be seen here, otherwise the number of
programs indicated for automatic mode is displayed.
1.1.3 Indication of Ready Status of Control
The light of the LED "NC ready" indicates the power-on and functional ready condition of the
control system.
The LED will turn dark
– upon power-off of the control system,
– if the control breaks down,
– if the monitoring program (watchdog) of the control detects a malfunctioning or a fatal
error.
If the LED is dark, the control is out of service!
1.2 Machine Control Board
The operation mode and functional state of the machine must be capable of being changed and
the machining must be capable of being started and stopped. The buttons and switches
influencing the function of the machine are called machine control items. The machine
control
items can be operated
– partly after selecting the appropriate general displaying area by means of softkeys on NC
keyboard, or
– by means of buttons, switches installed separately.
A summary of the state of control items, the active mode ect. appears if the CONTROL
PANEL screen is selected.
The machine control panel must contain primarily those operating items, that cannot be
accessed from the data input keyboard by means of softkeys (e.g. START, STOP), or their
access is hard. Certain items of the machine keyboard can make the intervention from data
input keyboard through softkeys unnecessary. Of course the developed machine keyboard can
also activate all, from data input keyboard through softkeys attainable machine control items.
The case, whether an operating item is to be accessed from softkeys or only from machine
control panel is determined by the machine tool builder as a function of the developed machine
keyboard, so for details turn to him for an information material.