IEC 60870-5-101/104 Test Tool

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IEC 60870-5-101/104 Client/Master

Versatile Client/Master Test Tool


  • Simple and easy-to-use IEC 60870-5-101/104 GUI client tool
  • Based on our lib60870.NET library. Runs on .NET Framework for Microsoft Windows
  • Supports all monitoring, control and parameter messages
  • Compatible with latest versions of the IEC 60870-5-101/104 standard
  • Supports file upload and download
  • Support TLS encryption and authentication according to IEC 60870-5-7

Freeware Edition

The Freeware Edition provides a lot of useful information to get an overview of the protocol and the communication between the client and an IED.


  • IEC 60870-5-104 client
  • Supports sending all system commands (C_CI_NA_1, C_RD_NA_1, C_CS_NA_1 …)
  • Clearly arranged telegram view to see order of events and get advanced insights into data flow and potential communication problems.
  • Information object view that shows the current values of all information objects received in monitoring direction
  • Displays APCI and control flow information
  • Automatic reconnect


  • Windows 7, Windows 8, Windows 10, .NET Framework 4

Professional Edition

The Professional Edition comes with all features of the Freeware Edition. In addition the following features are supported.


  • Support for IEC 60870-5-101 (CS 101) serial communication with balanced and unbalanced mode
  • Telegram detail view (see the bits and bytes)
  • Sending all process command message types in control direction (C_SC_NA_1, C_DC_NA_1, C_RC_NA_1, C_SE_NA_1, C_SE_NB_1, C_SE_NC_1, C_BO_NA_1┬á with or without CP56Time2A time stamp)
  • Sending parameter and parameter activation commands.
  • Sending monitoring (M_XX) messages in reverse direction
  • Freely sending all kinds of APCI commands
  • Shows CS 101 link layer information
  • Modifying flow control behavior for testing
  • Disable/Enable transmission of test messages
  • Save information object list as CSV or Excel sheet
  • Save received telegrams to log file or Excel sheet
  • Define message filters
  • Save settings in configuration files
  • Copy messages to clipboard
  • upload/download files
  • Support TLS encryption


  • Windows 7, Windows 8, Windows 10, .NET Framework 4.0