Modbus RTU over TCP Master Example

[Ken Boyd]

Good Day All,

Does anyone have an example how to setup .py for RTUoverTCPMaster Server?

import sys
import modbus_tk
import modbus_tk.defines as cst
from modbus_tk import modbus_tcp

from modus_tk import modbus_rtu_over_tcp

def main():
"""main"""
logger = modbus_tk.utils.create_logger(name="console", record_format="%(message)s")
try:

#Create the server
server = ????????

logger.info("running...")
logger.info("enter 'quit' for closing the server")

[Júnior Ferraz]

Here is an example:

from modbus_tk import modbus_rtu_over_tcp

import modbus_tk.defines as cst # cst = constants

unit = 1

host='www.myserver.com.'

port = 1234

#it read data of registrator 64000 until 64008

client = modbus_rtu_over_tcp.RtuOverTcpMaster(host=host,port=port,timeout_in_sec=10)

read_input_data = client.execute(slave=unit, function_code=cst.READ_INPUT_REGISTERS, starting_address=64000, quantity_of_x=9) 

#it write the values 77,88,99 (its in a list because you can write multiple values) on register 64001,64002 and read the informarion at 64100 until 64108.

read_write_data = client.execute(slave=unit, function_code=cst.READ_WRITE_MULTIPLE_REGISTERS, starting_address=64100, quantity_of_x=9, output_value=[77,88,99], write_starting_address_FC23=64000) 

[Ken Boyd]

Thank You!

Ken B

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