| Spec | Description |
|---|---|
| S1 | Input data |
| S2 | Input control |
| S3 | Input status |
| S4 | Maximum user data length |
| S5 | Engineering units |
| S6 | Start-up control and force quality control |
| S7 | Return alarm time-out length (second) |
| S8 | Spare |
| S9 | Spare |
| S10 | Spare |
| S11 | Spare |
| Block | Type | Description |
|---|---|---|
| N | User | User defined data and status |
| N+1 | Real | Block status |