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W
hat do the keys do?
The keys on the NT2S B can perform user defined functions. The same keys can be used to
change data or to scroll through a list of screens. The operation of keys depends on the type of
screen being displayed as follows:
Type of screen
Key operations
Normal
All keys perform user defined functions as configured by the software
Special
Arrow keys, CLR and ENT keys are used to change data.
(with data entry)
NEXT and PREV keys act as function keys.
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NEXT and PREV keys are used to scroll through the list of screens.
Other keys act as function keys.
For all both line screens, the keys can be redefined to perform user defined task which can be
different from global key task.
H
ow are LEDs controlled?
The NT2S B scans a user definable register called the LED register. The least significant 2 bits in
this register are mapped to the LEDs. If a bit is ON, the corresponding LED is turned ON.
H
ow can data be entered?
There are two ways to edit data using the NT2S B. One way is to use function keys.The function
keys can download a constant or can increment/decrement assigned register value or can
change a coil status. However, the number of keys is limited.
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