Simply Modbus - Data Communication Test Software - Simply the easiest way to test and debug Modbus systems

Modbus tester for serial communication diagnostics

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Data Communication Test Software

Simply the easiest way to test and debug Modbus systems

TCP Client (Master) Emulator

TCP Master screenshot

No install program. Just download, unzip and run.

Free demonstration version with full functionality.

Features

· Functions as a Modbus TCP Client (Master) or Modbus RTU-over-TCP Master

· Connects to RTU/ASCII Slave devices using Modicon 984 (5 digit addressing) protocol

· All information is entered and displayed in one window.

· Displays the data traffic

· Supported Function codes:

Function Code	Action	Table Name
01 (01 hex)	Read	Discrete Output Coils
05 (05 hex)	Write single	Discrete Output Coil
15 (0F hex)	Write multiple	Discrete Output Coils
02 (02 hex)	Read	Discrete Input Contacts
04 (04 hex)	Read	Analog Input Registers
03 (03 hex)	Read	Analog Output Holding Registers
06 (06 hex)	Write single	Analog Output Holding Register
16 (10 hex)	Write multiple	Analog Output Holding Registers

· Change data types and byte and word ordering with a click
to determine the format of the reply string without repolling.

· Supports multiple data types in the same message.

· Supports Standard Modbus and Enron Modbus

· A notes column allows labelling the results

· Allows saving and restoring configuration settings

· Write window allows writing single and multiple values

· Save the communication log to a text file

and more...

See the online manual

Try the demo before you buy.

See the tutorial on How Modbus TCP Works