Allen Bradley DF1

The registter's address format: N7:1.2/3

N - Type of data file, such types are available: I, O, S, B, T, C, R, N, F

7 - number of data file (optional for types - I, O, S)

1 - element number

2 - sub-element number (optional)

3 - bit number (optional, does not work with bit - type)