Rockwell-automation 1747-ACNR15 ControlNet Adapter Module User Manual Manual do Utilizador descarregar pdf (Página 48)

Publication 1747-UM003A-EN-P

4-20 Application Examples

Create a Ladder Program

The final step is to write a ladder program for the SLC processor, including

configuring the 1747-SCNR for slot 3 of the processor’s chassis. After

downloading the program to your processor, place it into the RUN mode. Your

program should now be able to read data from the 1746-IA16 in word I:3.3

and write to the 1746-OB16 in word O:3.3. The analog input data resides in

words I:3.7 and I:3.8, while the analog output data must be copied to words

O:3.5 and O:3.6.

Note that your ladder program should also contain an unconditional rung with

an OTE instruction addressed to the SCNR scanner’s RUN/IDLE bit, O:3.0/

10 for this example. When the SLC processor is placed into the RUN mode,

this rung sets the SCNR scanner’s RUN/IDLE bit and places the scanner into

the RUN mode as well. The scanner begins executing the configured

connections when the RUN/IDLE bit is set.

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Rockwell-automation 1747-ACNR15 ControlNet Adapter Module User Manual Manual do Utilizador Página 48