ml1100 datalogging

I am trying to log data in the ml 1100 plc based on a change of state in any of the inputs/outputs. In RS logix, I can trigger a data log using a OSR or OSF function, but to repeat it separately for each of the I/O's makes the program long and cumbersome consuming a lot of variables. Is there a more efficient way?

Thanks

You can move a complete word (input or output)to your storage location every time there is a change in input or output word. That is 16 bits at a time.