Denne side beskriver kommunikationen med en Autarco LH-serie hybridinverter over Modbus-RTU (rs485). Som standard er inverteren sat til adresse 1. RS485-interfacet er en 4-polet connector kaldet "COM", som er placeret på bunden af inverteren bag en beskyttelsesplade. Den præcise position er markeret i den orange boks på billedet nedenfor:
Set tættere på ser porten således ud:
En passende connector skal anvendes til denne 4-polet connector på Autarco-inverteren for at forbinde til Sofar EMS. På Sofar EMS kan inverteren forbindes til RS485-porten. Ledningsforbindelsen er som følger:
Info
RS485 Wiring
- For correct RS485 wiring: Follow the guidelines for RS485 wiring.
- If the wiring shown in the table below is incorrect, please let us know.
- There is no general consensus in the industry about the usage of A and B for the RS485 polarity, so it may be counterintuitive and opposite of what you might expect for some devices.
| Device | Sofar EMS model OM1 | Sofar EMS model IG8 | RS485-USB converter | RS485-Ethernet converter |
|---|---|---|---|---|
| Pin 3 | RS485 A | RS485_POS | RS485 A | TX+ |
| Pin 4 | RS485 B | RS485_NEG | RS485 B | TX- |
| N/A | RS GND | GND | Not available | G |
Advarsel
NOTE: RS485 Device Addresses
- You MUST give each device on the RS485 bus a unique address. Check the manual of the device on how to do this.
- Use lower addresses first (1, 2, ...) because the Sofar EMS will find them faster!
- For each device, it is generally recommended to stick with the factory default baud rate, parity, and stop bits. The Sofar EMS will scan on those first.