| Spec | Description |
|---|---|
| S1 | Input 1 alarm signal |
| S2 | Input 2 alarm signal |
| S3 | Input 3 alarm signal |
| S4 | Input 4 alarm signal |
| S5 | Input 5 alarm signal |
| S6 | Input 6 alarm signal |
| S7 | Input 7 alarm signal |
| S8 | Input 8 alarm signal |
| S9 | Input 9 alarm signal |
| S10 | Input 10 alarm signal |
| S11 | Input 11 alarm signal |
| S12 | Input 12 alarm signal |
| S13 | Input 13 alarm signal |
| S14 | Input 14 alarm signal |
| S15 | Input 15 alarm signal |
| S16 | Input 16 alarm signal |
| S17 | Output 1 device driver block |
| S18 | Output 2 device driver block |
| S19 | Output 3 device driver block |
| S20 | Output 4 device driver block |
| S21 | Output 5 device driver block |
| S22 | Output 6 device driver block |
| S23 | Output 7 device driver block |
| S24 | Output 8 device driver block |
| S25 | Output 9 device driver block |
| S26 | Output 10 device driver block |
| S27 | Output 11 device driver block |
| S28 | Output 12 device driver block |
| S29 | Step number (current) |
| S30 | Station address |
| S31 | Run/hold status (boolean) |
| S32 | I/O utilization |
| S33 | Manual override lockout |
| S34 | Default mode of outputs |
| S35 | Last step number |
| S36 | Spare |
| Block | Type | Description |
|---|---|---|
| N | Bit | Hold/initialize |
| N+1 | Real | Initial step number |
| N+2 | Real | Spare |
| N+3 | Bit | Alarm acknowledge key |