Output Addressing RsLogix500

[JesusRCh 1]

Hi Everyone,

I've been studying some plc programs at work and I have a question. Why an output would be addressed as O:[N48:1].0/[N47:1]?. Also, when I force that output the state of O:0/8 in the data file goes from 0  to 1. How's this linked?. There are other Outputs with the same configuration.

 

[Joe E. 259]

Study up on indirect addressing. Basically, the CPU takes the value stored in N48:1 and N47:1 and substitutes them in the address. In this case, you're highlighting output O:0.0/8, which would mean that N48:1 = 0 and N47:1 = 8.

[JesusRCh 1]

Oh yeah Joe you're right, I also meant to ask what was the name of that subject, thank you so much.