| Spec | Description |
|---|---|
| S1 | Segment attributes (see below) |
| S2 | Target period |
| S3 |
|
| S4 | Checkpoint period |
| S5 | PID normal/external reset |
| S6 | PID derivative gain (maximum) |
| S7 | Minimum exception report time |
| S8 | Maximum exception report time |
| S9 | Significant change (percent of span) |
| S10 | High/low alarm deadband reports (percent of span) |
| S11 | Deviation alarm deadband reports (percent of span) |
| S12 | Reserved |
| S13 | Slave sampling period (seconds) |
| S14 | Cycle time alarm limit |
| S15 | Auto sequencing off/on |
| 0X | Tune and modify allowed |
| 1X | No tuning allowed |
| 2X | Lock modify |
| 3X | Lock tune and modify |
| X1 | Seconds |
| X2 | Minutes |
| Block | Type | Description |
|---|---|---|
| N | Real | Previous cycle elapsed time |
| N+1 | Real | Current cycle elapsed time |
| N+2 | Real | Processor utilization (percent) |
| N+3 | Real | Checkpoint overrun count |
| N+4 | Real | Cycle time overrun |