| Spec | Description |
|---|---|
| S1 | Primary module address |
| S2 | Secondary module address |
| S3 | Analog input subscriber block |
| S4 | Digital input subscriber block |
| S5 | Analog output subscriber block |
| S6 | Digital output subscriber block |
| S7 | FIP transmitter definition |
| S8 | Bus arbitrator |
| S9 |
|
| S10 | Synchronization ID |
| S11 | Promptitude period |
| S12 | Window |
| S13 | Number of synchronization subsystem |
| S14 | Timer control |
| S15 | Field bus segment number |
| S16 | Spare |
| Block | Type | Description |
|---|---|---|
| N | Bit | Primary module status |
| N+1 | Bit | Secondary module status |