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CHAPTER 3 TERMINAL OPERATING

3.I Connecting to the host

3.I.1 Main Menu

The IP address shown in the top of display is the terminal IP address.

Key [FUNC] [1] to go to connection screens.

3.I.2 Connecting

Key [ENTER] to connect, [ESC] to return to main menu, and any oter key to go to the next session.

While connecting to the host. Wait few seconds. If it is not the good IP address or Port, from main menu do [F2] to change configuration. The default address and port comes from configuration file.

3.I.3 Connected

After Telnet connection :

If the terminal is selected by host, the current terminal type (TERMINAL) appears.
Following the application, key the user and password.

3.I.4 Out Of range

If the terminal is out of S24 radio network range, the terminal holds the connection and asks for retry or abort the session. The following screen appears :

If the session is aborted, the Telnet connection may remain opened in the host side and you should manually shutdown the session in the host.

On retry, the terminal try to send the current transaction. Move to a radio covered area to retrieve the host session.

3.II Ending session

While connected in a telnet session, the session will be closed by the host, or by the user. To close the Telnet connection, key the end sequence. (Normally Ctrl-X), ant the terminal returns to the main menu.

3.III Changing Host IP Address

From the Main Menu, key [FUNC] [2] to access to the configuration. This is the active address, until a Bios Boot.

3.IV Printing

A printer may be attached to the serial port of the PDT. Special 5250 display allows to redirect data flow to the printer. Printer driver in WTn52 is designed for "label" printers instead "line" printers, and data is stored in terminal to allow reprint operations.

While storing printer data, the terminal displays :

Before print, the terminal connects to the printer and displays :

If printer is not responding, the terminal displays :

• [ENTER] Retries the whole connecting and printing operation.
• [CLEAR] Aborts operation and suppress printing data.

After a print operation, the following screen appears :

• [ENTER] restores the display and continue with terminal operations.
• [F1] Redo the last print operation.

3.V Scanning

The scanner activation is done by the trigger keys, depending on the terminal model. The scanner is activated and configured by SCANNER section in configuration file. Each barcode symbology has a specific section in the same file.
The behavior of the barcode reads in the emulated terminal is configured by the BARCODES section.
Barcodes will be edited to fit in application fields. see BC_DEDIT section in configuration file.

3.VI Keyboard Operation

PDT Keyboard is "one finger" operating. When a keystroke needs a combination of several keys, those keys should be keyed sequentially (not at same time like PC's Keyboard).

To make a "Function + Control + Up-Arrow" function (e.g. to do a logical scroll up), do the following sequence :

• Hit the [FUNC] key, then
• Hit the [CTRL] key, then
• Hit the Key.

The displayed blinking cursor reflects the keyboard state.

PDT Keyboard changes following the terminal. The same terminal may be shipped with different keyboards. The PDT keyboard has the following states :

Locked, means that the state remains locked, and changes at each time the [ALPHA] key is pressed ("toggle" system).

Single, means that the state applies only for the next keystroke, and then returns to the normal previous state.

WTn52 has terminal functions that are called by keyboard keystrokes. The scan codes assignments are done by the configuration file (CHAPTER 5) and  may be changed. Scan codes generated by PDT terminals may change following the terminal model or the keyboard model.

Some function keys, are trapped by the PDT operating system and perform some specific functions like "Lamp" (Backlight), "Dark" (dark LCD display), "Light" (dim LCD display), and may not be used for other functions.

See also APPENDIX F "Keyboard Reference".
See also APPENDIX A "terminal functions".
You can see the scan code for each key in the terminal by "[F4] See Options / [F1] FN KEYS / [F1] SCAN CODES".

3.VII Screen and display

The displayed cursor reflects the keyboard state (see 3.VI Keyboard Operation).

The emulated terminal normally has a 24 lines and 80 rows screen. WTN52 allows to configure non-standard display sizes emulation, up to 80 rows and 24 lines (See [EMULATION] section).

PDT have a display with 8 or 16 lines and 20 or 21 rows. WTN52 allows to use it  in "double height" (show 8 lines in a 16 lines terminal) to increase text visibility (and / or "double width").

For easy-to-use applications it is recommended to write or adapt them to the physical display size of the hand held terminal.

WTN52 has a "Logical Scroll" mechanism to allow large screen sizes to be mapped into the smaller PDT display (see [SCROLL] section). The map may be fixed or moving controlled by the FixedMode= option.

It is not recommended to use the moving option in an application, because users needs to learn functions keys to scroll, and understand the "Logical Scroll" system.

The "Logical Scroll" system, automatically moves the PDT display into the screen area, following "edges", to show a display area around the cursor position.

User may move too the display area into the screen by using "Logical Scroll Keys".

In the fixed mode, the position of the display in the emulated screen is fixed, even if the cursor goes out of the display area.

3.VIII Troubleshoot

The RF transmission is a complex program with many protocol layers (RF, Ethernet, IP, TCP) in the operating system and an user application (client). This protocol stack in hand held terminals is subject to unexpected power off conditions (batteries removed, shocks, etc) that may prevent the terminal software to manage correctly some protocol sequences and may "hang" the terminal.

To restart the terminal in proper conditions, it will be necessary to reboot it by a "Bios Boot" command. See Appendix F.II Boot sequences.

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