System Data
The System Data region is a pseudoregion maintained within the device communication process that contains information on the device. There is only one record in the SD region; the device information is accessed as attributes of this record.
For the UNT, the SD region provides the following data:
| Description | Address | Point Type |
| Model ID | SD[1].DEVID | ANALOG_U8 |
| Model name | SD[1].MODEL | TEXT[16] |
| Days in service | SD[1].SERVICE | ANALOG_U32 |
| Device status | SD[1].STS | ANALOG_U32 |
For the DX9100, the SD region provides the following data:
| Description | Address | Point Type |
| Model ID | SD[1].DEVID | ANALOG_U8 |
| Firmware Revision | SD[1].FWREV | ANALOG_U8 |
| Supervisory Control Word | SD[1].SUP | ANALOG_U16 |