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Modbus Test Tools

Simply Modbus tools are high-level software simulators used for testing, diagnosing, and debugging Modbus communication. Each tool is designed for a different purpose. Choose the tool that fits your application.


TCP Client tool reduced snapshot

TCP Client

Connect to Modbus TCP devices over Ethernet TCP/IP networks.
 

Key Features

  • Your PC becomes a
    Modbus TCP Client or
    Modbus RTU-over-TCP Master
  • Connect to slave devices
    through your PC's Ethernet port
  • Sent requests and
    view received data
  • Sent write commands to
    change slave data
  • Supports multiple function codes
    FC 01,02,03,04,05,06,15,16
  • Save and load configurations
  • Log data for later analysis

Use Cases

  • Training and education
  • Troubleshoot TCP/IP Modbus communication
  • Send requests to
    Modbus TCP Servers
    (slave devices) to verify:
    • slave devices are
      alive and responding
    • IP Addresses
    • data addresses and formats
    • register contents

More Info Download


RTU Master tool reduced snapshot

RTU/ASCII Master

Communicate with Modbus slave devices on a serial network
(RS232C or RS485)

Key Features

  • Your PC becomes a
    Modbus RTU Master or
    Modbus ASCII Master
  • Connect to slave devices
    though your PC's serial port
  • Sent requests and
    view received data
  • Sent write commands to change slave data
  • Supports multiple function codes
    FC 01,02,03,04,05,06,15,16
  • Save and load configurations
  • Log data for later analysis

Use Cases

  • Training and education
  • Troubleshoot serial communication
  • Send requests to
    Modbus RTU or ASCII
    slave devices to verify:
    • slave devices are
      alive and responding
    • slave IDs are correct
    • wiring and signal converters
    • serial settings,baud rate etc.
    • data addresses and formats
    • register contents

More Info Download

RTU Slave tool reduced snapshot

RTU/ASCII Slave

Simulate a Modbus slave device on a serial network
(RS232C or RS485)

Key Features

  • Your PC becomes a
    Modbus RTU Slave or
    Modbus ASCII Slave
  • acts as a "soft PLC," allowing you to test SCADA or HMI systems without the actual physical hardware.
  • Monitors for requests from
    an RTU/ASCII Master device
  • When it sees a request it verifies the slaveID and ensures the requested data exists it its tables, then replies to the master with the data
  • Supports multiple function codes
    FC 01,02,03,04,05,06,15,16
  • Save and load configurations

Use Cases

  • Training and education
  • Troubleshoot serial communication
  • Test Modbus master software
  • View Master request messages
  • Simulate a field device for Modbus master development

More Info Download