Modbus - KWh meter - DDS238-1 ZN

Info (ENG)

This is a DIN-rail mounted product. Our DDS238-1 ZN single phase multifunction energy meter is designed to measure the active energy used as well as calculate the real current, real voltage, real power, and power factor. Equipped with a RS485 port, it is just 1 module width similar to a circuit breaker.

Technical Specification
1. Voltage: 230V ±10%
2. Basic Current: 5A
3. Max. Current: 32A
4. Starting Current: 20mA
5. Impulse Output: 3200imp/kWh
6. LCD display is 6+1 (one decimal), kWh, A, V, KW, COS display step by step
7. Wire Connection: LLN
8. Meter Accuracy: ±1%
9. Baud/ Transmission Rate: 4800bps
10. RS485 Port: Support
11. Communication Protocol: DL/T645-2007 or MODBUS

Schema’s

Foto’s

Mobus registers

Voorbeeld uitlezen

Fabriek gegevens
Standaard adres: 1
Baud rate: 9600

#!/usr/bin/env python
 
# Modbus uitlezen
# Apparaat: DDS238-1 ZN (KWh meter)
#
# Script gemaakt door S. Ebeltjes (domoticx.nl)
 
from __future__ import division
import pymodbus
import serial
from pymodbus.pdu import ModbusRequest
from pymodbus.client.sync import ModbusSerialClient as ModbusClient #initialize a serial RTU client instance
from pymodbus.transaction import ModbusRtuFramer
 
from pymodbus.constants import Endian              # Nodig voor 32-bit float getallen (2 registers / 4 bytes)
from pymodbus.payload import BinaryPayloadDecoder  # Nodig voor 32-bit float getallen (2 registers / 4 bytes)
from pymodbus.payload import BinaryPayloadBuilder  # Nodig om 32-bit floats te schrijven naar register
 
method = "rtu"
port = "/dev/ttyUSB0"
baudrate = 9600
stopbits = 1
bytesize = 8
parity = "N"
timeout = 1
retries = 2
 
try:
  client = ModbusClient(method = method, port = port, stopbits = stopbits, bytesize = bytesize, parity = parity, baudrate = baudrate, timeout = timeout, retries = retries)
  connection = client.connect()
except:
  print "Modbus connectie error / DDS238-1 ZN"

def kwh(appid):
  try:
    data = client.read_holding_registers(0, 2, unit=appid)
    dds2381zn_kwh_L = data.registers[0]
    dds2381zn_kwh_H = data.registers[1] / 100
    client.close()
    return dds2381zn_kwh_L + dds2381zn_kwh_H
  except:
    print "Modbus register error (kwh)"
    return 0

print kwh(1)

#!/usr/bin/env python

# Modbus uitlezen

# Apparaat: DDS238-1 ZN (KWh meter)

# Script gemaakt door S. Ebeltjes (domoticx.nl)

from __future__ import division

import pymodbus

import serial

from pymodbus.pdu import ModbusRequest

from pymodbus.client.sync import ModbusSerialClient as ModbusClient #initialize a serial RTU client instance

from pymodbus.transaction import ModbusRtuFramer

from pymodbus.constants import Endian # Nodig voor 32-bit float getallen (2 registers / 4 bytes)

from pymodbus.payload import BinaryPayloadDecoder # Nodig voor 32-bit float getallen (2 registers / 4 bytes)

from pymodbus.payload import BinaryPayloadBuilder # Nodig om 32-bit floats te schrijven naar register

method = "rtu"

port = "/dev/ttyUSB0"

baudrate = 9600

stopbits = 1

bytesize = 8

parity = "N"

timeout = 1

retries = 2

try:

client = ModbusClient(method = method, port = port, stopbits = stopbits, bytesize = bytesize, parity = parity, baudrate = baudrate, timeout = timeout, retries = retries)

connection = client.connect()

except:

print "Modbus connectie error / DDS238-1 ZN"

def kwh(appid):

try:

data = client.read_holding_registers(0, 2, unit=appid)

dds2381zn_kwh_L = data.registers[0]

dds2381zn_kwh_H = data.registers[1] / 100

client.close()

return dds2381zn_kwh_L + dds2381zn_kwh_H

except:

print "Modbus register error (kwh)"

return 0

print kwh(1)

[#/handleidingen/modbus_DDS238-1_ZN” ]

Zoeken

Modbus – KWh meter – DDS238-1 ZN

Info (ENG)

Schema’s

Foto’s

Mobus registers

Voorbeeld uitlezen