Esp32 Jk Pb Modbus Example Modbus Register 4796: Name total runtime in seconds

Technical Definition

The register name total runtime in seconds at address 4796 is used to monitor name total runtime in seconds on the Esp32 Jk Pb Modbus Example.

• Protocol: Modbus RTU
• Data Type: U DWORD
• Unit: S
• 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 name total runtime in seconds (Address: 4796)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=4796, 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: "name total runtime in seconds"
  address: 4796
  value_type: U_DWORD
  unit_of_measurement: "S"

Connection Diagram

Here is the standard RS485 wiring for this configuration:

graph TD
    PLC[Host Controller / Home Assistant]
    Device[Esp32 Jk Pb Modbus Example]

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

💡 Engineer's Insight

Analysis: Total accumulated runtime of the device or battery usage in seconds.

Troubleshooting: Zero indicates no recorded runtime, suggesting a new device, a reset, or a data logging malfunction.