Modbus tcp emulator linux

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Modbus Simulator in Linux

soso7885/modbus_simulator

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README.md

0x01 Read Coil Status 0x02 Read Input Status 0x03 Read Holding Registers 0x04 Read Input Registers 0x05 Force Single Coil 0x06 Preset Single Register 0x15 Force multi Coil 0x16 Preset multi Register 

1. Modbus RTU ./mbser_mstr [comport path] ./mbser_slv [comport path] 2. Modbus TCP ./mbtcp_mstr [IP] [port] ./mbtcp_slv [port] 

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Modbus Simulator in Linux

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Diagslave Modbus Slave Simulator

diagslave is a simple command line based Modbus slave simulator and test utility. diagslave is using the FieldTalk ™ Modbus driver.

Installation

Windows

Download into a folder and extract the zip archive. The diagslave.exe command must be run from a Command Prompt:

Linux

The tarball contains multiple binaries for different CPU architectures. Run the version matching your system from the command line. Example for Raspberry Pi:

cd diagslave linux_arm-eabihf/diagslave -h

Usage

Usage: diagslave [OPTIONS] [SERIALPORT] Arguments: SERIALPORT Serial port when using Modbus ASCII or Modbus RTU protocol COM1, COM2 . on Windows /dev/ttyS0, /dev/ttyS1 . on Linux General options: -m ascii Modbus ASCII protocol -m rtu Modbus RTU protocol (default if SERIALPORT set) -m tcp MODBUS/TCP protocol (default otherwise) -m udp MODBUS UDP -m enc Encapsulated Modbus RTU over TCP -o # Master activity time-out in seconds (1.0 - 100, 3 s is default) -a # Slave address (1-255 for RTU/ASCII, 0-255 for TCP) Options for MODBUS/TCP, UDP and RTU over TCP: -p # TCP port number (502 is default) -c # Connection time-out in seconds (1.0 - 3600, 60 s is default) Options for Modbus ASCII and Modbus RTU: -b # Baudrate (e.g. 9600, 19200, . ) (19200 is default) -d # Databits (7 or 8 for ASCII protocol, 8 for RTU) -s # Stopbits (1 or 2, 1 is default) -p none No parity -p even Even parity (default) -p odd Odd parity -4 # RS-485 mode, RTS on while transmitting and another # ms after Options for Modbus RTU: -f # Tolerance for inter-frame gap detection in ms (0-20)

Usage Examples

diagslave -b 9600 -p none -m rtu COM1

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A Simple Modbus TCP Device Simulator

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gavinying/modsim

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README.md

ModSim — A Simple Modbus TCP Device Simulator

modsim is a very simple Modbus TCP device simulator deployed on cloud, which populates a few registers for each type of Coil / Discrete input / Input register / Holding register.

It is recommended to use modpoll to test with it, the example configuration is as following,

device,modsim001,1,, poll,holding_register,40000,20,BE_BE ref,value1,40000,uint16,rw ref,value2,40001,uint16,rw ref,value3,40002,uint16,rw ref,value4,40003,uint16,rw ref,value5,40004,int16,rw ref,value6,40005,int16,rw ref,value7,40006,int16,rw ref,value8,40007,int16,rw ref,value9,40008,uint32,rw ref,value10,40010,uint32,rw ref,value11,40012,int32,rw ref,value12,40014,int32,rw ref,value13,40016,float32,rw ref,value14,40018,float32,rw poll,coil,0,24,BE_BE ref,coil1-8,0,bool,rw ref,coil9-24,8,bool16,rw 

A docker image has been provided for user to directly run the program,

docker run -p 5020:5020 helloysd/modsim

It will create a virtual Modbus TCP device running at localhost:5020 , and then you can poll it using modpoll tool,

modpoll --tcp localhost --tcp-port 5020 --config https://raw.githubusercontent.com/gavinying/modpoll/master/examples/modsim.csv

Use sudo before the docker command if you want to use the standard port 502 .

sudo docker run -p 502:5020 helloysd/modsim modpoll --tcp localhost --config https://raw.githubusercontent.com/gavinying/modpoll/master/examples/modsim.csv

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A Simple Modbus TCP Device Simulator

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