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| Data | Format | Description | Access | I/O tag type |
|---|---|---|---|---|
| Data block/Extended data block elements | D{B|X}m.DB{B|W|D}n[x] | m = "data block" number n = byte offset in the data block x = suffix KF, KG (as necessary - see Note 1) | R/W | Ai, Ao, Ci, Co |
| Data block bits | D{B|X}m.DBXn.k | m = "data block" number n = byte offset in the data block k = bit position [0..7] | R/W | Di, Do |
...