User manual OMRON NT2S-SF123B-E QUICK START

[. . . ] Key F1/REG F2/DATA Work Bit I0201. 00 I0201. 01 Register mode function Changes register prefix Enters data entry mode Increments register number or data depending on mode Decrements register number or data depending on mode Clears data field to 0 / Register field to first register value Accepts new data and sends to the PLC F3/DOWN I0201. 02 F4/UP F5/CLR F6/ENT I0201. 03 I0201. 04 I0201. 05 Unit Operations: The work bits I0200. 00 to I0200. 15 control the mode of operation of the unit as follows: Work Bit I0200. 00 I0200. 01 I0200. 02 & I0200. 03 I0200. 04 to I0200. 07 I0200. 08 & I0200. 09 I0200. 10 & I0200. 11 I0200. 12 to I0200. 14 I0200. 15 Function Controls LED0 Controls LED1 Not used Reserved for future use 00 : Screen mode 01 : Register mode 10 : Operator mode 11 : Invalid Timeout to screen mode from Operator mode 00 : 10 seconds 01 : 20 seconds 10 : 30 seconds 11 : 40 seconds Reserved for future use To disable data entry in Screen mode (ON : Disable) From the above table, it is clear that the unit will display ASCII text (see section on Screens for more details on this ) if I0200. 08 and I0200. 09 are OFF. To allow operators to view and edit the registers, I0200. 09 is to be kept ON. If I0200. 09 is OFF, the unit will not display any registers and the function keys will only act as push buttons mapped to the corresponding bits from I0201. 00. [. . . ] One is to keep the value in DM0020 constant and change the data in the screen registers in the ladder logic. Second is to keep the screen text in the data memory (by editing DM registers) and change the value in DM0020 so as to point to the correct memory address to display the desired screen. The unit reads 16 registers from DM0000 to DM0015 (in which DM0012 to DM0015 are used for Bar Graph) in every scan. To do so, use hex bytes 0 to B (C to F used for Bar Graph) corresponding to register DM0000 to DM0011 respectively in the screen. It is similar to embedding register, only instead of 0 to F use 10 to 1F hex bytes to address DM0000 to DM0015. The registers DM0000 to DM0015 can be edited with this feature one at a time in a screen. Example 1: To display a static screen Suppose the following screen needs to be displayed on the NT2S C : Last Rinse Cycle Water pump is on To display this screen, do the following: a. Move number 200 in DM0020 since the screen text will be stored in DM0200 onwards. Move character string "Last Rinse Cycle" into 8 words from DM0200. In a similar manner, the characters "Water pump is on" can be embedded into 8 words from DM0208. from DM0208 to DM0215) This will put the following data in the data words below: Word DM0200 DM0201 DM0202 DM0203 DM0204 DM0205 DM0206 DM0207 ASCII Hex La st R in se C yc le 4C61H 7374H 2052H 696EH 7365H 2043H 7963H 6C65H Word DM0208 DM0209 DM0210 DM0211 DM0212 DM0213 DM0214 DM0215 ASCII Hex Wa te r pu mp i s on 5761H 7465H 7220H 7075H 6D70H 2069H 7320H 6F6EH Example 2: Embedding a variable in the screen Suppose the following screen needs to be displayed : Door: CLOSED BAKETIME: 13. 6s Suppose the bake time is available in data word DM0100 and the oven status is given by bit I001. 00. Move number 200 in DM0020 since the screen will be stored in DM0200 onwards. Move characters "OPEN" if bit I001. 00 is ON or characters "CLOSED" if I001. 00 is OFF. d. e. In a similar manner, embed the characters "BAKETIME: " into 5 words from DM0208. So, move the data of DM0100 into DM0003 so that embedding can be done. This command completes the screen by appending the "s " to the bake time. f. g. This will put the following data in the data words below: Word DM0200 DM0201 DM0202 DM0203 DM0204 DM0205 DM0206 DM0207 ASCII Hex Do or : CL OS ED 446FH 6F72H 3A20H 434CH 4F53H 4544H 2020H 2020H Word DM0208 DM0209 DM0210 DM0211 DM0212 DM0213 DM0214 DM0215 ASCII Hex BA KE TI ME : 4241H 4B45H 5449H 4D45H 3A20H 0303H 2E03H 7320H s Register mode: In the register mode, the operator can access all the registers and bits in the PLC. [. . . ] To display Bar Graph with value in DM0013, put 0D0D in DM0200 onwards. Triggering screens : As it can be seen from the above examples, there are two ways to display screens with NT2S C : 1. Keep all the message characters in the data memory ( the Omron PLCs have lot of data registers which in most applications involving simple digital controls are not used anyway ) and simply change the offset register to display different screens. The user can fill the data memory using the "data display editor" menu of the PLC programming software. [. . . ]