Modbus Client programs using Python-3

• client.py

Installation:

• sudo pip3 install modbus

Usage Examples:

Client:

• from modbus.client import *
• c = Modbus_Client() ...if host = 'localhost'
• c = Modbus_Client(host='HOSTNAME') ...Change HOSTNAME to Server IP address
• c.read() ...To read 10 Input Registers from Address 0
• c.read(FC=3, ADR=10, LEN=8) ...To read 8 Holding Registers from Address 10
• c.write(11,22,333,4444) ...To write Holding Registers from Address 0
• c.write(11,22,333,4444, ADR=10) ...To write Holding Registers from Address 10
• c.write(11,22, FC=15, ADR=10) ...To write Coils from Address 10
• fc() ...To get the supported Function Codes

Supported Function Codes:

• 1 = Read Coils or Digital Outputs\n\
• 2 = Read Digital Inputs\n\
• 3 = Read Holding Registers\n\
• 4 = Read Input Registers\n\
• 5 = Write Single Coil\n\
• 6 = Write Single Register\n\
• 15 = Write Coils or Digital Outputs\n\
• 16 = Write Holding Registers")