Release Notes

v1.2.5 (2017/10/16)

  • Added JK flip-flop
  • Fixed TOF not resetting properly

v1.2.4 (2016/04/07)

  • Documentation now available only online
  • Improved plugins log messages
  • Minor improvements and bug fixes

v1.2.3 (2015/03/18)

  • Automgen node replaced with two new nodes, the Automgen 16D8A node, with 16 digital IO and 8 analog IO, and the Automgen 64D16A, with 64 digital IO and 16 analog IO
  • S7-PLCSIM BIT node from Siemens S7-PLCSIM plugin increased from 8 to 16 IO
  • Fixed CONNECT I/O freezing sporadically when using specific combinations of nodes
  • Other performance improvements

v1.2.2 (2015/02/16)

  • Siemens PLC and MHJ nodes allow negative offsets for analog inputs and outputs
  • Added PICAXE plugin: allows the usage of the PICAXE Editor 6 as a simulator of PICAXE microcontrollers
  • Ability to control the diagram execution state from outside the application, either through the buttons on the taskbar, or as command line arguments (/run, /pause, /reset and /step)
  • Links are now drawn behind nodes
  • Added Online Documentation option to the Help menu
  • Fixed bug: value of input sockets was not being reset when the links were removed by relinking to another socket

v1.2.1 (2014/12/19)

  • Registered file type association for the .CONNECTIO file extension
  • Ability to specify (as a command line argument) which diagram to load on startup
  • Added Slave ID property to the Modbus TCP/IP plugin
  • Destroy method of custom nodes were not being invoked when changing the active diagram
  • Fixed a bug when loading previous version save files containing OPC Client OutputBit nodest

v1.2.0 (2014/11/19)


  • Stylistic changes (fonts, colors)
  • Added visual clues for separators between the main application areas


  • Changed diagram background
  • Node placement is now snapped to a small grid for effortless alignment
  • Changed links appearance
  • Added the ability to change the endpoints of existing links
  • Node palette items expand on single click


  • Application window restores its state and position between sessions
  • Saved diagrams from previous versions containing MHJ and OPC nodes are not compatible with this release
  • Cycle time and diagram viewport are now restored from saved files
  • Memory and Output nodes now work correctly when used in feedback
  • Faster application initialization and plugin loading
  • Improved diagram performance on operations with a large number of nodes


  • Due to stability issues OPC plugin no longer supports UA
  • MHJ plugin supports now “virtually” any number of I/O points
  • New nodes added:
    • Siemens S7-PLCSIM (v5.4/v5.5)
    • Siemens S7-300 TCP/IP
    • Siemens S7-400 TCP/IP
    • Siemens S7-1200 TCP/IP
    • Siemens S7-1500 TCP/IP
    • Siemens Logo! 0BA7 TCP/IP
    • Siemens Logo! 0BA8 TCP/IP
    • Modbus TCP/IP server
    • Modbus TCP/IP client
    • Automgen TCP/IP server
  • Plugins loading state displayed in the logger
  • Fixed Initialize method not being called after an undo command
  • Fixed the behavior of asynchronous nodes - UpdateAsync method being called after the OnDestroy
  • Added new attribute to pluginImproved licensing system
  • Performance improvements
  • Added documentation attribute ([Documentation(”filename”)]) which allows to specify the documentation filename for each node
  • Nodes no longer support documentation in .rtf format, only plain .txt

v1.1.6 (2014/09/25)

  • Fixed being unable to run CONNECT I/O without internet connection
  • Added a Reset Node to the UTILS (resets the diagram)

v1.1.5 (2014/08/14)

  • Added OPC plugins (UA and DA clients)
  • Added MHJ plugin
  • Removed fade-in / fade-out animations from links and nodes’ sockets
  • Added update checker
  • Bit sources status are now saved
  • Added “Hide when minimized” checkbox that hides the application in the systray toolbar when minimized
  • Minor bug fixes

v1.1.4 (2014/06/30)

  • Added description to the plugin nodes
  • Fixed diagram bottom margin
  • Remove upper limit in string sources (NOTE: strings are still trimmed to 64 chars in the memory map)
  • The string sources description is equal to the string value by default
  • The extension of saved files changed to “.CONNECTIO”. The files with extension .xml can still be loaded for compatibility reasons

v1.1.3 (2014/06/02)

  • Minor bug fixes.

v1.1.2 (2014/05/27)

  • Added Clear Logger menu item
  • Fixed diagram print
  • Added plugin “Key Bindings” which allows binding keys events to boolean values
  • Menu “View” has now an option to show/hide the overview window
  • User guide no longer available with CONNECT I/O. Find documentation at
  • Added fade effect to links and sockets (boolean values)
  • Fixed several issues with the background grid
  • Default update rate of Advantech DAQ plugin changed to 16 ms
  • CONNECT I/O minimizes to the systray when closed. Must use menu item “Exit” to terminate the application

v1.1.1 (2014/04/02)

  • Added an overview window
  • NumericalToDateTime and DateTimeToNumerical nodes added
  • Automation.BDaq.dll no longer required
  • Improved the behaviour of the Advantech USB 4750 and Advantech USB 4704 nodes
  • Main panel can be scrolled with the mouse wheel
  • Logger capacity is now limited to prevent data overflow
  • Fixed memory addresses not being cleared when a new diagram is created or the application is closed
  • Improved navigation and zoom
  • Fixed undo/redo on numerical and string input ports
  • Date format is now “yyyy-MM-dd” on all DataTime type nodes
  • Fixed DateTime source returning incorrect output after changing time values
  • Comparison nodes only work if all input ports are connected
  • TOFF node renamed to TOF
  • Fixed TOF node not resetting if a FTRIG or RTRIG node is connected to the IN input port
  • Fixed SHL, SHR, ROL and ROR nodes not being calculated correctly for size 8 bits
  • Improved diagram update algorithm
  • Numerical source up limit set to 10000 by default

v1.1.0 (2014/02/28)

  • Added support for Plugins
  • Redesign of the user interface
  • Fix the undo/redo which broke the diagram logic
  • Diagram links are now correctly copied when performing copy and paste
  • Function Blocks nodes are now a plugin
  • Hardware nodes Advantech USB 4750 and Advantech USB 4704 are now a plugin
  • Logger automatically becomes visible when there is new information
  • Links become thicker on mouse hover
  • CONNECT I/O has now read only permissions over the memory positions used by external applications to ensure data integrity
  • Added grid to the diagram background
  • Node descriptions are now saved
  • LiveGraph plugin added for real-time data visualization, analysis and logging using the third-party application LiveGraph (download at
  • Many bug fixes