The following are options related specifically to TN3270 emulation:


Attention Key Method
Determines the sequence of characters Flex Terminal Emulator sends to the host when the TN3270 Attention host key is pressed. In most cases, TN3270E is the preferred method and is the default setting. However, select Telnet if a non-IBM TCP/IP host package is in use, or select IBM if an IBM TN3270 Server or IBM mainframe TCP/IP host program is used.

Automatic Reset Keyboard
Enable to send the 3270 Reset host key automatically when the keyboard becomes locked with an input inhibited condition. Select Immediate to instantly send Reset, or Any Key Press to send Reset when the next key is pressed.


Note: when Any Key is selected, pressing a key while the cursor remains in a protected field may result in the keyboard unlocking but then immediately locking again. Therefore, it is recommended to either move the cursor to an unprotected field, or using a key that is associated with cursor movement, such as the arrow keys or Tab.

Automatic Unlock Keyboard
Enable this option for host applications that do not issue the Keyboard Unlock command.


Automatic Repeat AID Key

When enabled, any AID key is repeatedly sent to the host by pressing and holding the key.


Bell Sound

When enabled (default), host bell will be played as defined by the Windows system sound Default Beep.


Insert Mode Toggle Cursor Type

Enable to automatically toggle the cursor type when insert mode is toggled. If disabled, has no impact on the cursor. Disabled by default.


Insert Mode Reset after AID Key

When enabled, insert mode is turned off after an AID key is sent to the host. Disable to allow the user to keep the insert mode on through screen navigation. Enabled by default.


Numeric Field Checking

Enable to allow only the numeric characters "0" through "9", the "+", the "-", the "." and the "," characters to be entered into TN3270 host fields that have the numeric field attribute enabled. When the cursor is positioned in a numeric field, "NUM" will display in the Operator Information Area (OIA) to indicate this.


OIA Line Date and Time Format

Select from one of the following formats to display on the Operator Information Area (OIA):


  • Disabled (default)
  • Julian Date
  • System Date
  • Time
  • Time and Julian Date
  • Time and System Date


Note: System Date and Time are displayed based on how the Windows operating system is configured using the Short date and Short time settings. If these are not displaying as expected, you may need to adjust these in the OS from Settings > Time & language > Language & region > Regional Format > Change formats.


Program Check Error

When enabled, X PROG nnn will be displayed on the OIA line when an invalid 3270 data stream is encountered, where nnn is a number indicating the type of error. Disabled by default.


Show Unprotected Fields As

Select how unprotected fields are displayed on the host screen to indicate where each field begins and ends. The following options are available, where Normal does not display the fields and is the default setting:


  • Normal (default)
  • Dot
  • Underline
  • Reverse