| Spec | Description |
|---|---|
| S1 | Source module address |
| S2 | Source block number |
| S3 | Source PCU address |
| S4 | Source loop number |
| S5 | Spare integer |
| S6 | Spare real |
| S7 | Spare boolean |
| Block | Type | Description |
|---|---|---|
| N | Real | Current value and status |
| N+1 | Real | Next highest alarm limit |
| N+2 | Real | Next lowest alarm limit |
| N+3 | Real | Extended status |