Default Enm 223 R1 Plc Lite Modbus Register 100: Enm prefix Urms L1

Technical Definition

The register enm prefix Urms L1 at address 100 is used to monitor enm prefix urms l1 on the Default Enm 223 R1 Plc Lite.

• Protocol: Modbus RTU
• Data Type: U WORD
• Unit: V
• 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 enm_prefix Urms L1 (Address: 100)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=100, 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: "enm_prefix Urms L1"
  address: 100
  value_type: U_WORD
  unit_of_measurement: "V"

Connection Diagram

Here is the standard RS485 wiring for this configuration:

graph TD
    PLC[Host Controller / Home Assistant]
    Device[Default Enm 223 R1 Plc Lite]

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

💡 Engineer's Insight

Analysis: RMS Voltage for Line 1 (L1) in Volts (V). Measures effective voltage value for L1.

Troubleshooting: Zero voltage indicates no power on L1, blown fuse, or wiring fault. Check circuit breaker and connections.