Omron NT2S-SF122B-E QUICK START

While writing this document, it is assumed that the user is well acquainted with
the PLC being used and with Windows based software usage, in general.

Hereafter, in the manual, NT2S-SF122B-E will be referred to as NT2S B.]

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What does the unit do?

The NT2S B connects to YOUR PLC over its progr amming or standard com munications port. It is
capable of displaying screens based on conditions in the PLC and is capable of changing data in
the PLC registers/coils. It can also print screen text over the serial port.

What does the unit have?

The NT2S B has the following functional blocks:

2 lines of 16 character backlit LCD

u
u 6 keys keypad
u 2 LEDs for annunciation
u 8K / 32K EEPROM memory for PLC driver and screens
u RS232C Port to connect the PC for programming
u RS232C Port to connect the PLC

How does the unit work?

The NT2S B must be configured for YOUR application. It stores the configuration details and
screens in it's memory. Based on conditions in the PLC the configured screens are displayed.
When a key is pressed, configured action is taken. The unit continuously communicates with the
PLC to detect conditions for displaying screens, to control the 2 LEDs on the unit and for its
internal operations.

How are screens displayed?

Each screen has a unique number. The NT2S B scans a us er definable register called as Scr een
Triggering Register (STR) in the PLC. To display screen number "XXX", simply put the number
"XXX" in this STR. Valid screen numbers are 1 to 65528.

Normal screens ar e used to monitor status or alarm s. A screen can have register values or bit
controlled text embedded in it which is dynamically updated. Special screens are used to change
data in the PLC or to turn a coil ON or OFF.

Link screen defines a lis t of screens that can be viewed consecutively by pressing the NEXT or
PREV keys.

What are screen attributes?

A normal screen can f lash or scroll on the display. Any screen can be assigned to be sent to a
serial printer. A screen can be assigned only to the top line, bottom line or both lines. A
minimum time can be assigned to ensure that the operator has enough time to view the screen.

If the PLC calls other screens in this time, they will be stored on a queue inside the unit.
The maximum queue size is 3 screens.

Note: The queue c an be cleared by putting the number 65535 in STR. You can likewise c all a
screen on priority by putting the number 65535 in STR f irst and then calling the desired screen
number.