The device mode SSR2 register is located by default at address 40129. The bit values in SSR2 are common for all Modbus clients. The bits give an overview of the protection relay's mode. For example, bit 6 is activated if the protection relay's configured time synchronization source is lost.
| Bit | Description |
|---|---|
| 0 | Test mode (1= Device is set into test mode) |
| 1...2 |
Local/Remote states (bit 1= LSB) 00 = Remote – Modbus controls allowed 01 = Station – Modbus controls allowed 10 = Local – Modbus controls not allowed 11 = Off – Modbus controls not allowed |
| 3...5 |
Active setting parameter setting group (bit 3 = LSB) 001 = Setting group 1 010 = Setting group 2 011 = Setting group 3 100 = Setting group 4 101 = Setting group 5 110 = Setting group 6 |
| 6 | Protection relay time synchronization failure (1 = Failure) |
| 7 | 0 = not used |
| 8 | Last reset cause (1= Power reset) |
| 9 | Last reset cause (1= Watchdog reset) |
| 10 | Last reset cause (1= Warm reset) |
| 11...15 | 0 = not used |