EM6400_read.py

import time
import pymodbus 
import serial
from pymodbus.pdu import ModbusRequest
from pymodbus.client.sync import ModbusSerialClient as ModbusClient
from pymodbus.transaction import ModbusRtuFramer

#Endian library for decoding HEX to Float
from pymodbus.constants import Endian
from pymodbus.payload import BinaryPayloadDecoder as decode
from pymodbus.payload import BinaryPayloadBuilder as builder
from pymodbus.compat import iteritems

#EM6400 is defined as Client
try:
    client = ModbusClient(method ='rtu',port='COM2',stopbits=2, bytesize=8, parity='N', baudrate=9600)
    client.connect()
except:
    print("Unable to connect to the Com Port, Please try Again \n")

while 1:
    #Average Current Values
    A=client.read_holding_registers(address=3913, count=2, unit =1)
    A_d = decode.fromRegisters(A.registers, byteorder=Endian.Big, wordorder=Endian.Big)
    A_d ={'Current':A_d.decode_32bit_float(),}

    #Line to line average Voltage Values
    VLL=client.read_holding_registers(address=3907, count=2, unit =1)
    VLL_d = decode.fromRegisters(VLL.registers, byteorder=Endian.Big, wordorder=Endian.Big)
    VLL_d ={'Voltage':VLL_d.decode_32bit_float(),}

    #Active power, total
    W=client.read_holding_registers(address=3903, count=2, unit =1)
    W_d = decode.fromRegisters(W.registers, byteorder=Endian.Big, wordorder=Endian.Big)
    W_d ={'Power':W_d.decode_32bit_float(),}

    #Forward active Energy Values
    E=client.read_holding_registers(address=3961, count=2, unit =1)
    E_d = decode.fromRegisters(E.registers, byteorder=Endian.Big, wordorder=Endian.Big)
    E_d ={'Energy':E_d.decode_32bit_float(),}

    print ("-------------")
    timestamp = time.strftime('%H:%M:%S %d-%m-%Y') # Printing Timestamp
    print (timestamp)

    # Printing Current Value
    for name, value in iteritems(A_d):
        print ("%s\t" % name, value)
        A=value

    # Printing Voltage Value
    for name, value in iteritems(VLL_d):
        print ("%s\t" % name, value)
        VLL=value

    # Printing Power Value
    for name, value in iteritems(W_d):
        print ("%s\t" % name, round(value,1))
        W=value
    
    # Printing Energy Value
    for name, value in iteritems(E_d):
        print ("%s\t" % name, round(value,2))
        E=value

    time.sleep(15) #Giving a 15 sec delay between each value

client.close()