Esp8266 Pv19 Modbus Register 25265: Inverter Warning message 1

Technical Definition

The register Inverter Warning message 1 at address 25265 is used to monitor inverter warning message 1 on the Esp8266 Pv19.

• Protocol: Modbus RTU
• Data Type: INT16
• Unit:
• Access: Read Only

How to Read (Python pymodbus)

Use this code snippet to read this specific value via RS485:

from pymodbus.client.sync import ModbusSerialClient

client = ModbusSerialClient(method='rtu', port='/dev/ttyUSB0', baudrate=9600)
client.connect()

# Read Inverter Warning message 1 (Address: 25265)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=25265, count=2, unit=1)

if not result.isError():
    print(f"Raw Value: {result.registers}")
else:
    print("Error reading register")

client.close()

Integration (Home Assistant)

Paste this into your configuration.yaml:

- platform: modbus_controller
  name: "Inverter Warning message 1"
  address: 25265
  value_type: INT16
  unit_of_measurement: ""

Connection Diagram

Here is the standard RS485 wiring for this configuration:

graph TD
    PLC[Host Controller / Home Assistant]
    Device[Esp8266 Pv19]

    PLC -- "A+ (D+)" --> Device
    PLC -- "B- (D-)" --> Device
    PLC -- GND --> Device

💡 Engineer's Insight

Analysis: A warning message from the inverter, indicating a condition that requires attention but not immediate shutdown. Units: ASCII or numerical codes.

Troubleshooting: A non-zero value indicates a potential issue (e.g., high Temperature, grid instability). Investigate based on the specific warning code.