User manual OMRON NT2S-SF121B-E QUICK START

[. . . ] It can also print screen text over the serial port. What does the unit have? The NT2S A has the following functional blocks: u 10-30 VDC power supply u 2 lines of 16 character backlit LCD 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 PLC for programming u RS232C Port to connect the PC for programming and also for printing u RTC How does the unit work? The NT2S A must be configured for YOUR application. The unit continuously communicates with the PLC to detect conditions for displaying screens, to control the 2 LEDs on the unit and for it's internal operations. How are screens displayed? Each screen has a unique number. The NT2S A scans a user definable register called as Screen Triggering Register (STR) in the PLC. To display screen number "XXX", simply put the number "XXX" in this STR. [. . . ] 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. Another method is to use a special screen which allows data entry. When this special screen is triggered, the operator can enter the new data using the arrow keys and the CLR and ENT keys. Coils can also be edited this way. How is the unit configured? Each unit MUST be configured using the Windows based setup software provided with the unit. The software is quite easy to use and contains comprehensive online help. The software can be used either from the pull down menus or by using the comprehensive Toolstation that appears on the bottom half of the Window. Each tool has balloon help associated with it to help identify the function. If the Toolstation does not appear on your screen, it can be turned on using the "Options" pull down menu. If any error screen indicating that "PLC driver is not found" appears, contact factory for support. For any project, you must define the Tag database first. Tags can be defined by using either Edit-Tag database menu or Tag tool. A tagname can be assigned to each tag and the tag can be referred to by it's name subsequently, making it very convenient to use. It is advised to define all the registers/coils you will be using in your project ahead of time. Once the Tag database is defined, assign the STR and the LED register. This can be done using Edit-Setup menu or by clicking on the PLC-NT2S A link on the Toolstation. Use a bit addressable register as the LED register so that each LED can be easily controlled. How are function keys configured? To define the global task for the keys : The NT2S A has 6 keys that can be assigned user definable functions by using the pull down menu of Edit-Function keys or by clicking on the NT2S A key tool on the tool station. The dialogue shows the function keys along with the user assignable legends. Click on the key you wish to define, select the tag on which the key operates on and the action. Depending on what type of tag ( bit or register ) is selected, only actions that can be performed on that tag will be enabled. DO NOT USE THE FUNCTION BUTTONS FOR EMERGENCY STOP APPLICATIONS! It is advised that separate switches be used outside the PLC for ANY emergency stops. To define the screen specific keys : You can define the keys task, specific for the screen while editing the screen. [. . . ] 2 MB or more. The following programming sequence is suggested · · · · · · · · Start a new project. Download work to Unit. Note on RTC The RTC values are downloaded in the PLC as follows : Register LED + 1 Register LED + 2 Register LED + 3 Register LED + 4 Register LED + 5 Register LED + 6 Register LED + 7 ---------------------Seconds Minutes Hours Day of week Date Month Year (SS) (MI) (HH) (Sunday = 0) (DD) (MM) (YY) The RTC can be set in the Unit as follows: During the power-on sequence, press the F1 + F3 keys together. NT2S will show you the current value for each field and ask you to enter the new value for the field. This can be done just as any other data entry, using the UP, LEFT, CLR and ENT keys. [. . . ]