5/250 Prgramming Question

Hello all,

I am manually converting a 5/250 to Controllogix. Inside the 5/250 the original program writes to one of the status words and appears to be doing some buffering for index purposes. I am still looking at it but I cannot find any information on what the status word is. It's address is 1S:2 and I am getting nowhere searching for it. Does anyone have any information on this? Thanks in advance

Status words are generally read-only; I'm surprised that the program in writing to it.

1S:2 the the Status File for the LP processor in Slot 1, I think.

Do you think maybe it's extracting the Status data into another table for export or logging ?

Followup: Good addressing information in this Addressing Reference for the PLC-5/250:

http://literature.rockwellautomation.com/idc/groups/literature/documents/rm/5000-rm001_-en-p.pdf