| Device Type | Modbus TCP (Ethernet) | RS485 | Curtailment | Reactive power control |
|---|---|---|---|---|
| WH-TIA502 | ❌ | ✅ | ⚠️ | — |
| WH-TIA602 | ||||
| WH-TIA802 | ||||
| WH-TIA103 | ||||
| WH-TIA123 | ||||
| WH-TIA133 |
WHES Three Phase Hybrid Inverter Protocol (RTU)The EPSherpa EMS communicates with this device over Modbus RTU on RS485. This device has no Modbus TCP interface, so an Ethernet connection cannot be used.
Run the communication cable directly from the VPP 485 port of the device to an RS485 port on the EPSherpa EMS.
| Device | EPSherpa EMS model OM1 | EPSherpa EMS model IG8 | RS485-USB converter | RS485-Ethernet converter |
|---|---|---|---|---|
| VPP_485A | RS485 A | RS485_POS | RS485 A | TX+ |
| VPP_485B | RS485 B | RS485_NEG | RS485 B | TX- |
| N/A | RS GND | GND | Not available | G |
The EPSherpa EMS supports only these serial settings for this device:
| Setting | Value |
|---|---|
| Protocol | Modbus RTU |
| Baud rate | 115200 |
| Parity | None |
| Data bits | 8 |
| Stop bits | 1 |
| Modbus address | 1 (default), 1 - 247 supported |