Sprsun V2 Modbus Register 43: Friendly name Frequency conversion fault 8 bits lower

Technical Definition

The register friendly name Frequency conversion fault 8 bits lower at address 43 is used to monitor friendly name frequency conversion fault 8 bits lower on the Sprsun V2.

• Protocol: Modbus RTU
• Data Type: U WORD
• 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 friendly_name Frequency conversion fault 8 bits lower (Address: 43)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=43, 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: "friendly_name Frequency conversion fault 8 bits lower"
  address: 43
  value_type: U_WORD
  unit_of_measurement: ""

Connection Diagram

Here is the standard RS485 wiring for this configuration:

graph TD
    PLC[Host Controller / Home Assistant]
    Device[Sprsun V2]

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

💡 Engineer's Insight

Analysis: Indicates a frequency conversion fault (lower 8 bits). Represents a specific error code from the drive.

Troubleshooting: Check drive error logs. Fault may indicate motor issues, power supply problems, or internal drive faults.