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Teklogix 9150 Wireless Gateway User Manual Chapter 5 Mini Controller Configurati

Teklogix 9150 Wireless Gateway User Manual 75MINI-CONTROLLER CONFIGURATION 55.1 Overview.............................775.2 Hosts...............................805.3 Main Host Menu.........................825.3.1 General Options...................835.3.2 9010 Emulations . . . . . . . . . . . . . . . . . . . 845.3.3 3274/Telnet. . . . . . . . . . . . . . . . . . . . . . 845.3.3.1 Emulation Options. . . . . . . . . . . . . . . 845.3.3.2 Protocol Options. . . . . . . . . . . . . . . . 955.3.3.3 Function Key Mappings . . . . . . . . . . . . 985.3.4 5250/Telnet. . . . . . . . . . . . . . . . . . . . . . 995.3.4.1 Emulation Options. . . . . . . . . . . . . . . 995.3.4.2 Protocol Options. . . . . . . . . . . . . . . 1105.3.4.3 Function Key Mappings . . . . . . . . . . . 1125.3.5 ANSI/Telnet....................1135.3.5.1 Emulation Options. . . . . . . . . . . . . . 1135.3.5.2 Protocol Options. . . . . . . . . . . . . . . 1165.3.5.3 Function Key Mappings . . . . . . . . . . . 121
Teklogix 9150 Wireless Gateway User Manual 77Chapter 5: Mini-Controller ConfigurationOverview5.1 OverviewThe network controller in a Teklogix system performs a number of important tasks. One of these tasks is emulation: the translation of data between the protocol of the host computer and the protocol used by Teklogix terminals. The data which is sent from a host computer to a terminal to provide its display, and returned to the host as a result of operations at the terminal, is called a data stream. Host computers can provide data streams of various types to their terminals.Teklogix terminals can directly accept only two types of data stream: TESS and ANSI. TESS (Teklogix Screen Subsystem) is the proprietary data stream used by Teklogix terminals. ANSI data streams are a standard type of data stream used by wired ANSI terminals. Other types of data stream provided by the host must be converted into TESS or ANSI before Teklogix terminals can work with them. This translation is done by emulation software in a network controller. The 9150 is equipped with emulation capabilities, allowing it to act as a mini-controller. When a 9150 is configured as a mini-controller, Teklogix terminals can emulate an ANSI, 5250 or 3274 terminal via a 9150 rather than through a 9400/9300 Network Controller.Important: 9150s acting as mini-controllers are designed for small, low-transaction sites. A 9400/9300 Network Controller is required for systems that support more than 50 terminals.Acting as a mini-controller, the 9150 can support up to 32 additional networked base stations and up to 50 terminals. A 9150 mini-controller can also manage wireless LAN configurations.A 9150 configured as a mini-controller can support the following emulations:• 5250 emulation using TCP/IP over an Ethernet or Token Ring LAN.• 3274 emulation using TCP/IP over an Ethernet or Token Ring LAN.• ANSI emulation using TCP/IP over an Ethernet or Token Ring LAN.Note: The 9150 main parameters should first be set up as described in Chapter 3: “9150 Main Configuration”.
Chapter 5: Mini-Controller ConfigurationOverview78 Teklogix 9150 Wireless Gateway User ManualFigure 5.1 9150 Mini-Controller ConfigurationHand-HeldRF Terminal7035Hand-HeldRF TerminalMini-Controller9150 Wireless GatewayBase Station and Access Point9150 Wireless Gateway70307030 Hand-HeldRF Terminal802.11 / 2.4 GHz902 MHzETHERNETTCP/IP91408055 Vehicle-MountRF TerminalWireless GatewayHOST
Teklogix 9150 Wireless Gateway User Manual 79Chapter 5: Mini-Controller ConfigurationOverviewFor operation as a mini-controller, the parameters in the Hosts pages under Base Station Configuration should be set appropriately. The Hosts options are found on the Configuration Main Menu page. For information on configuring radio protocol parameters, please refer to “Radio Link Features” on page 72.
Chapter 5: Mini-Controller ConfigurationHosts80 Teklogix 9150 Wireless Gateway User Manual5.2 HostsThe drop-down menu in this option shows the host names present on the system. Up to six hosts can be supported. A “host” must be configured for each host that com-municates with the 9150 mini-controller. Opening the Configure dialog box for a selected host lists the parameters that can be modified or deleted for that host. New hosts can be added by selecting “[#] Create New” in the drop-down menu before entering the Configure dialog box.NameThis parameter indicates the assigned host name. The host name also appears on the RF terminal when switching between hosts in a multiple-host environment.EnabledThe Enabled option must be turned on ( √ ) for terminals to communicate with this host.Emulation and ProtocolThis drop-down menu provides a list of host emulations and communication proto-cols supported by the 9150. Working with Teklogix terminals and base stations, the 9150 can emulate IBM 3278-2, 5251-11, and 5555-B01 terminals, as well as ANSI terminals.Protocols are the methods by which terminals communicate with host computers over various physical media such as Ethernet, Token Ring, and serial connections, as well as radio-link connections. The 9150 supports the TCP/IP protocol.
Teklogix 9150 Wireless Gateway User Manual 81Chapter 5: Mini-Controller ConfigurationHostsThe supported emulations with their respective protocols are: • 9010/ TCP/IP or Serial (See page 84 for Configuration Parameters).• 3274/Telnet (See pages 84 to 98 for Configuration Parameters).• 5250/Telnet (See pages 99 to 112 for Configuration Parameters).• ANSI/Telnet (See pages 113 to 121 for Configuration Parameters). When the 9150 acts as a base station, it uses the 9010 emulation (a proprietary asyn-chronous protocol developed by Teklogix) to communicate with a 9300 Network Controller or a host using a Teklogix Software Development Kit (TSDK). For detailed information on configuring the 9150 as a base station, please refer to Chapter 4: “Base Station Configuration”.When the 9150 acts as a mini-controller, it uses the 3274 and 5250 emulation protocols to communicate with IBM hosts, or the ANSI emulation protocol to com-municate with ANSI terminals.Terminal RangeThe values entered in this parameter designate the first and last terminals in the range of terminals that will communicate with the host. These terminal numbers are mapped to this particular host. Terminal numbers may range from 1 to 50.
Chapter 5: Mini-Controller ConfigurationMain Host Menu82 Teklogix 9150 Wireless Gateway User Manual5.3 Main Host MenuWhen you choose an existing host name from the Hosts listbox and then select the Configure button, the 9150 displays the Host Menu. The Host Menu presents the options for four sub-menus: General Host Options, Emulation Options, Protocol Options, and Function Key Mappings. There is also a Main Menu button. When you select this button, the 9150 displays the Configuration Main Menu page (see page 79 for an enlarged illustration). Figure 5.2 Overview Of Host Menus
Teklogix 9150 Wireless Gateway User Manual 83Chapter 5: Mini-Controller ConfigurationGeneral OptionsAs illustrated in Figure 5.2 on page 82, the four configuration sub-menus display the following options: “General Options”When you select this sub-menu, the 9150 displays the General Options page for the host.“Emulation Options”When you select this sub-menu, the 9150 displays the Emulation Options page for the host. This page may vary depending on the type of emulation and proto-col selected for the host.“Protocol Options”When you select this sub-menu, the 9150 displays the Protocol Options page for the host. This page may vary depending on the type of emulation and proto-col selected for the host.“Function Key Mappings”When you select this sub-menu, the 9150 displays the Function Key Mappings page for the host. This page may vary depending on the type of emulation and protocol selected for the host.Note: The Function Key Mappings parameters are not applicable to either of the 9010 emulations; the Protocol Options parameters do not apply to the 9010/TCP/IP emulation.5.3.1 General OptionsIn this page, you can select general options for this host connection. The host con-nection may also be deleted.
Chapter 5: Mini-Controller Configuration9010 EmulationsEmulation Options84 Teklogix 9150 Wireless Gateway User ManualName This parameter allows you to enter a name for the new host.Emulation and Protocol This parameter allows you to select the emulation and protocol to be used for the connection to this host. Available combinations of emulation and protocol are: 3274/Telnet, 5250/Telnet, ANSI/Telnet. Terminal Range This parameter allows you to specify the range of terminals which will communi-cate with this host. The left-hand textbox contains the lowest terminal number which is allowed to communicate with the host; the right-hand textbox contains the highest terminal number. Terminal numbers may range from 1 to 50.5.3.2 9010 EmulationsWhen the 9150 acts as a base station, it uses the 9010 protocol (a proprietary asyn-chronous protocol developed by Teklogix) to communicate with a 9400 or 9300 Network Controller, or a host using a Teklogix Software Development Kit (TSDK). For detailed information on configuring the 9150 as a base station, please refer to Chapter 4: “Base Station Configuration”.5.3.3 3274/Telnet 5.3.3.1 Emulation OptionsThe 9150 mini-controller displays this version of the Emulation Options page after you have selected the 3274/Telnet emulation/protocol combination for this host connection.With IBM 3274, or IBM 5250 emulation, the 9150 mini-controller converts the application data stream from the host to TESS (Teklogix Screen Subsystem) commands. Some of the parameters in this page govern the conversion of the host screens to TESS.
Teklogix 9150 Wireless Gateway User Manual 85Chapter 5: Mini-Controller Configuration3274/TelnetEmulation Options
Chapter 5: Mini-Controller Configuration3274/TelnetEmulation Options86 Teklogix 9150 Wireless Gateway User ManualIs Host Fujitsu If this parameter is enabled, the 9150 mini-controller sends its data in Fujitsu format. Enabling this parameter causes the standard IBM formatting codes (for start of field, setting buffers, etc.) to be replaced by the codes used by Fujitsu host computers.Use International EBCDIC If this parameter is enabled, the 9150 mini-controller uses the International EBCDIC character set, swapping the positions of the ! and ] characters. Alarm When this parameter is enabled, terminals beep when the word “ALARM” appears on the application screen in the location specified by the Command Region parame-ter (see page 95). The word “ALARM” should be a display-only field.Note: The Command Region parameter must be enabled for this parameter to work.Clear If this parameter is enabled, the 9150 mini-controller creates an empty entry field for an entry field that is filled with spaces.Some host applications rely on the video attributes of displayed characters to high-light fields, particularly entry fields. For example, the application screen may define all entry fields with reverse video and fill the field with spaces. This is effective on terminals that support reverse video, but on terminals that do not, it can make the field invisible since it is made up entirely of spaces.By default, all empty entry fields displayed at the Teklogix terminal are highlighted by the “entry character” chosen in the terminal’s configuration (not all Teklogix ter-minals support video attributes). Note: This operation is only performed on screens received from the host. Data sent to the host remains unaffected.Passthru If this parameter is enabled, the 9150 allows the host to send data directly to the RF terminal’s serial port. This is most commonly used for printing.
Teklogix 9150 Wireless Gateway User Manual 87Chapter 5: Mini-Controller Configuration3274/TelnetEmulation OptionsPreparing Host Screens for Pass-ThroughOn the screen to be sent through the terminal serial port, the word PASSTHRU (in capital letters) must appear on the first line, starting on the second column. The actual data to be sent to the terminal may start anywhere below the first line.With 5250 or 3274 emulations, attributes occupy a position in the screen buffer. An attribute placed between column 2 and the end of the word “PASSTHRU” will ‘push’ all following characters one position to the right. Therefore, any required attributes should occupy column 1 of the first line (just preceding the word “PASSTHRU”). Example:where @ is an attribute.When the 9150 is finished sending the data to the terminal’s printer, it will send an ENTER key to the host. The host must wait for the ENTER key before sending any more screens (including other PASSTHRU screens) to this terminal.Note: Refer to the Terminals User Manual for information about setting parameters on the terminal for pass-through.Procedures If this parameter is enabled, the host may send TESS procedures through the 9150 to the terminals. A TESS procedure is a group of TESS commands that can be exe-cuted by the TESS execute procedure command.Local If this parameter is enabled, the 9150 allows the host to provide pages to be loaded as local TESS procedures in the terminals.The local procedures are selected from a menu at the terminal. The terminals can perform these procedures when they are offline. Later when the terminals are online, they send the results of these functions to the host. column: 1 2 3 4 5 6 7 8 9 line 1: @ P A S S T H R U @ line 2: @ P A R T : 1 2 3 4 5
Chapter 5: Mini-Controller Configuration3274/TelnetEmulation Options88 Teklogix 9150 Wireless Gateway User ManualNote: The Procedures parameter must also be enabled for Local to work.Host Print When this parameter is enabled, the host can send extra data to the terminal’s screens, and instruct the terminal to print it. This is in contrast to the Local Print fea-ture, where the terminal makes the initial print request. The text that is passed to the printer is formatted into the 24 x 80 application screen. If the host can initiate the print operation, the text is printed. The 9150 identifies the additional text as a print page by the presence of the word “PRINT” (in capital let-ters) beginning in the 2nd column of line 13 on the 24 x 80 screen. The word “PRINT” should be defined as display-only text.The print page is positioned below the terminal’s display page (see the following figure). The size of the print page is always the same as the terminal’s display page (assuming that in the terminal’s configuration, the page length is less than 12 lines).When Host Print is enabled, the 9150 passes the print page to the terminal after receiving the application screen from the host.Figure 5.3 Application Screen With Print Page 1 2 3 4 5 6 7 8 9101112131415161718192021222324Display Page (8 x 40) Print Page (8 x 40) PRINT
Teklogix 9150 Wireless Gateway User Manual 89Chapter 5: Mini-Controller Configuration3274/TelnetEmulation OptionsNotes:1. Unlike the Passthru option, when using Host Print no escape commands can be sent to the printer.2. Support for printing must be enabled at the terminal in its Printer command under the TESS Features menu; refer to the 7030/8055/8060 Terminals User Manual for more information.Remote PrintWhen this parameter is enabled, the 9150 sends the print page to a terminal when-ever the terminal requests it (by sending the “F17” function key from the terminal, or the “PRINT” key on older terminals). The 9150 sends the function response back to the host. This is in contrast to Host Print, where the host makes the initial print request.Note: Support for printing must be enabled at the terminal. Refer to the Terminals User Manual or the Parameter Guide for more information.Pages This parameter determines the number of host screens (or pages) stored at the terminal, to a maximum of 16. The 9150 reduces data transmitted to the terminals by using the terminal’s capability to store a page of data for each screen it displays. The 9150 maintains an image of each page stored at the terminal. After receiving an application screen, the 9150 tries to match the screen with a stored page. If a similar page is already in the terminal’s memory, the 9150 instructs the terminal to redisplay its copy of the page; only the necessary changes are sent from the controller. If no match is found, the complete page is sent to the terminal over the radio link.Note: There is a corresponding parameter on the terminal itself, and the actual number of saved pages will be the smaller of the two values.
Chapter 5: Mini-Controller Configuration3274/TelnetEmulation Options90 Teklogix 9150 Wireless Gateway User ManualTransmit Line When this feature is enabled, all modified data at the terminal is automatically transmitted when the operator enters data into a transmit-upon-entry field.The value in this textbox specifies the line on the screen which is designated the transmit line. The last entry field above or on the transmit line on the screen will be identified as the transmit-upon-entry field. If any entry fields exist on lines below the transmit line, no entry field will be designated as the transmit-upon-entry field.A value of 0 (zero) disables this feature. A value of 24 designates the last entry field on each application screen as transmit-upon-entry.AIAGThis parameter provides auto-locate and fill for input coming from bar code readers. When bar code data is entered at a terminal, the terminal searches for “AIAG” fields on the current page that can accept the bar code data. The data preloaded into the “AIAG” field by the application program determines whether or not the bar code data is accepted.At the 9150 mini-controller, a decimal value of an ASCII character from 0 to 127 is set to match the “AIAG Field Identifier” set at the host. A value of 0 disables this feature.The format of the preloaded data is as follows:<mode> <AIAG prefix(data)>The mode character used with the command allows for different operating modes to suit various application operations. The automatic locate and fill operation applies only to data received from a bar code reader. Descriptions of the modes and AIAG prefix are listed in Table 5.1 on page 91. These modes are set at the host.
Teklogix 9150 Wireless Gateway User Manual 91Chapter 5: Mini-Controller Configuration3274/TelnetEmulation OptionsTable 5.1 Mode Functions And AIAG Prefix DescriptionExample: The information in the sample screen below is defined at and sent from the host. It includes the “AIAG Identifier” – the tag identifying this as an AIAG field – followed by the mode, in this case Mode 0, and finally, the “AIAG Prefix” – I.Figure 5.4 AIAG Field Sent From The HostMode Function0Display prefix, send prefix to host.1Do not display prefix, send prefix to host.2Display prefix, do not send prefix to host.3Do not display prefix, do not send prefix to host.+4Add 4 to above values to cause transmit to host when all AIAG fields with 4 set are filled. Function 0 is “pressed” if there are any fields with this bit set, and all fields with this bit set have been filled by operator input.+8 Add 8 to above values to allow overwrite of previously entered data.+16 Add 16 to above values to indicate cursor position priority for search and fill.AIAG Prefix (data) The text to be matched in the AIAG field.Item No. @0AIAG Information From HostAIAG Prefix (data)ModeAIAG Field IdentifierI
Chapter 5: Mini-Controller Configuration3274/TelnetEmulation Options92 Teklogix 9150 Wireless Gateway User ManualWhen the information arrives at the terminal screen, the appropriate AIAG field for the scanned information is located using the “AIAG Identifier”. Because Mode 0 was set at the host, the “AIAG Prefix” – I – is displayed on the terminal screen, and when this screen is completed, the prefix will be sent back to the host.Figure 5.5 AIAG Field Sent To The TerminalVisible Match CharacterBy inserting a special ASCII character directly before an entry field, the application program distinguishes a “match field” from an entry field. For example, suppose an angle bracket “>” is defined for visible match fields. Inserting “>” immediately preceding the entry field identifies it as a match field, as illustrated below.Part #> ___________The range for this parameter – 0 to 127 – represents the decimal values of ASCII characters. A value of 0 disables this feature. The ASCII decimal value entered at the 9150 must coincide with the value set by the application program.To use the Visible Match feature, the host computer preloads data into a match entry field; the data is visible on the terminal screen. The preloaded data sent to a terminal can consist of exact characters, special match characters or a combination of the two. Refer to Table 5.2 on page 93 for match characters recognized by Teklogix terminals.If an entry does not match the preloaded data, the entry is displayed, the terminal beeps, and the cursor moves to the first position in the match field. The operator can either make another entry in the match field, or move the cursor to a new field. Item No. IAIAG Information From Host To Terminal Screen@AIAG Prefix (data)AIAG Field Identifier
Teklogix 9150 Wireless Gateway User Manual 93Chapter 5: Mini-Controller Configuration3274/TelnetEmulation OptionsWhen an entry (even one that doesn’t match the preloaded data) is made in a match field, the entry is sent to the host as part of the terminal’s modified data during the next transmission.Table 5.2 Match CharactersExample: Suppose you want to preload an entry field with a part number. If the part number is known, you can preload the field with that part number. If more flexibility is needed, and the part number always begins with two alphabetic characters followed by a hyphen and four digits, the match string for the field would be: &&–#### .Hidden Match CharacterUnlike data in a “visible match” field, the preloaded data in a “hidden match” field is not displayed at the terminal.Note: Refer to “Visible Match Character” on page 92 for detailed information about field matching.The range for this parameter – 0 to 127 – represents the decimal values of ASCII characters. A value of 0 disables this feature. The ASCII decimal value entered at the 9150 must coincide with the value set by the application program.Character Description#Match a number.&Match a letter (either case).^Match an uppercase letter._Match a lowercase letter.|Match an alphanumeric character."Match a letter, number or space.?Match a punctuation character.'Match any character.:Match all character positions in the field with the preceding character.;Match any remaining characters, but not necessarily the remainder of the field, with the preceding character.
Chapter 5: Mini-Controller Configuration3274/TelnetEmulation Options94 Teklogix 9150 Wireless Gateway User ManualSerial I/O Serial I/O fields are special entry and fixed fields that accept input from and output to a serial port. The application program distinguishes this field as Serial I/O by pre-ceding the field with a special character. If this character precedes a fixed field, the data will be sent to the terminal’s serial port. If it precedes an entry field, the field accepts data from the terminal’s serial port.The range for this parameter – 0 to 127 – represents the decimal values of ASCII characters. A value of 0 (zero) disables this feature.Print Line This parameter allows you to enter the starting line number of the print page in the application screen. A value of 1 causes the display page to be printed; a value of 0 (zero) disables this feature.Print Form LengthThis parameter sets the printer’s form length in lines. The range is 0 to 24.Barcode Barcode-input-only fields are special entry fields that only accept input from a bar code reader. The application program distinguishes an entry field as barcode-input-only by preceding the field with a special character. The range for this parameter – 0 to 127 – represents the decimal values of ASCII characters. A value of 0 (zero) disables this feature.Entry Line This parameter contains the number of the first line displayed if there is no entry field in the upper-left portion of the screen, and if an entry field is at or below this line.The Entry Line parameter allows an automatic offset within the host screen, so that the area displayed by the terminal includes an entry field that would normally be out of bounds. Normally, Teklogix terminals only display the upper-left corner of the application screen because of their smaller display size.
Teklogix 9150 Wireless Gateway User Manual 95Chapter 5: Mini-Controller Configuration3274/TelnetProtocol OptionsField Overhead This parameter contains the maximum number of characters allowed between two fixed fields which still allows the 9150 to join them into one field.Sometimes the 9150 will join two adjacent fixed fields and then send them as one field. This reduces the overhead on the radio link. For example, if two fields were 4 characters apart and this parameter was ‘5’, then these fields would be joined into one.Command Region This parameter defines a region of the host screen which the 9150 will examine for the presence of reserved commands. The four numbers in the Command Region textboxes represent the row and column addresses of the upper left corner and the lower right corner of the command region. The first textbox of each pair contains the row number; the second contains the column number. The range of row values is 0 to 24; column values are 0 to 80. To define the last two lines of the host screen as the command region, for example, enter the values 23, 1 and 24, 80.Currently, the only command supported is ALARM (refer to page 86 for details on this command). When the word “ALARM” is placed anywhere within the command region, the 9150 will send a TESS beep command to the terminal.5.3.3.2 Protocol OptionsThis page differs depending on the type of emulation and protocol selected in the General Host Options page. The 9150 displays this version of the Protocol Options page when you select the emulation/protocol combination of 3274/Telnet for this host.
Chapter 5: Mini-Controller Configuration3274/TelnetProtocol Options96 Teklogix 9150 Wireless Gateway User ManualTerminal Type This parameter allows you to choose the type of terminal to be emulated by the 9150 for this host. At present there is only one choice of terminal for 3274/Telnet: the IBM 3278-2.Host Port This parameter allows you to enter a host port value for the selected 3274/Telnet host connection. The default value is 23.Maximum Sessions per Terminal This parameter contains the maximum number of telnet sessions which are allowed to originate from each terminal. The range is 0 to 127, with a default value of 4.
Teklogix 9150 Wireless Gateway User Manual 97Chapter 5: Mini-Controller Configuration3274/TelnetProtocol OptionsFirst Local Terminal Port This parameter contains the port number from which the first terminal will connect on outbound telnet sessions. The default value is 0.Local IP Address to Bind This parameter contains the IP address of the network adaptor in the 9150 from which the first terminal will connect on outbound telnet sessions.First Terminal Listen Port This parameter specifies the first port number at which the 9150 will listen for telnet connection requests to the terminals. The default value is 10000.Actively Negotiate with Host If this parameter is enabled, the 9150 negotiates with the host during setup of the telnet connection.Send IAC Interrupt Process as a System Request If this parameter is enabled, the 9150 sends the IAC Interrupt Process request to the host as a 3274 System Request.Send IAC Break as an Attention Key If this parameter is enabled, the 9150 sends the IAC Break request to the host as a 3274 Attention key.
Chapter 5: Mini-Controller Configuration3274/TelnetFunction Key Mappings98 Teklogix 9150 Wireless Gateway User Manual5.3.3.3 Function Key MappingsThis page differs depending on the type of emulation selected in the General Host Options page. The 9150 displays this version of the Function Key Mapping page when you select 3274 emulation for this host.Function key n The Function Key parameter allows you to select a code that will be sent to the host when you press a function key on the terminal. Each function key may be chosen from the same range of possible codes; however, each function key has a different default code. The default values are shown on this page.
Teklogix 9150 Wireless Gateway User Manual 99Chapter 5: Mini-Controller Configuration5250/TelnetEmulation Options5.3.4 5250/Telnet5.3.4.1 Emulation Options
Chapter 5: Mini-Controller Configuration5250/TelnetEmulation Options100 Teklogix 9150 Wireless Gateway User ManualThe 9150 displays this version of the Emulation Options page after you have selected the 5250/Telnet emulation/protocol combination for this host connection.With IBM 5250, or IBM 3274 emulation, the 9150 mini-controller converts the application data stream from the host to TESS (Teklogix Screen Subsystem) commands. Some of the parameters in this page govern the conversion of the host screens to TESS.Write Error Code If advisory text is selected here, the 9150 sends error codes to the terminal screen as advisory text, which is written at the bottom of the screen. If screen text is chosen, the 9150 sends the error codes as regular screen text.Use International EBCDIC If this parameter is enabled, the 9150 will swap the positions of the ! and ] charac-ters in the EBCDIC character table.Alarm If this parameter is enabled, terminals will beep when the word “ALARM” (in capital letters) appears on the application screen, in the location specified by the Command Region parameter (see page 109). The word “ALARM” should be a display-only field.Note: The Command Region parameter must be enabled for this parameter to work.Clear If this parameter is enabled, the 9150 mini-controller creates an empty entry field for an entry field that is filled with spaces.Some host applications rely on the video attributes of displayed characters to high-light fields, particularly entry fields. For example, the application screen may define all entry fields with reverse video and fill the field with spaces. This is effective on terminals that support reverse video, but on terminals that do not, it can make the field invisible since it is made up entirely of spaces.
Teklogix 9150 Wireless Gateway User Manual 101Chapter 5: Mini-Controller Configuration5250/TelnetEmulation OptionsBy default, all empty entry fields displayed at the Teklogix terminal are highlighted by the “entry character” chosen in the terminal’s configuration (not all Teklogix ter-minals support video attributes). The Clear feature creates an empty entry field in place of an entry field filled with spaces.Note: This operation is only performed on screens received from the host. Data sent to the host remains unaffected.Passthru If this parameter is enabled, the 9150 allows the host to send data directly to the RF terminal’s serial port. This is most commonly used for printing. Preparing Host Screens for Pass-ThroughOn the screen to be sent through the terminal serial port, the word “PASSTHRU” (in capital letters) must appear on the first line, starting on the second column. The actual data to be sent to the terminal may start anywhere below the first line.With 5250 or 3274 emulations, attributes occupy a position in the screen buffer. An attribute placed between column 2 and the end of the word “PASSTHRU” will push all following characters one position to the right. Therefore, any required attributes should occupy column 1 of the first line (just preceding the word “PASSTHRU”). Example:where @ is an attribute.When the 9150 is finished sending the data to the terminal’s printer, it will send an “ENTER” key to the host. The host must wait for the “ENTER” key before sending any more screens (including other “PASSTHRU” screens) to this terminal.Note: Refer to the 7030/8055/8060 Terminals User Manual for information about setting parameters on the terminal for pass-through. column: 1 2 3 4 5 6 7 8 9 line 1: @ P A S S T H R U @ line 2: @ P A R T : 1 2 3 4 5
Chapter 5: Mini-Controller Configuration5250/TelnetEmulation Options102 Teklogix 9150 Wireless Gateway User ManualProcedures If this parameter is enabled, the host may send TESS procedures through the 9150 to the terminals. A TESS procedure is a group of TESS commands that can be exe-cuted by the TESS execute procedure command.Local If this parameter is enabled, the 9150 allows the host to provide pages to be loaded as local TESS procedures in the terminals.The local procedures are selected from a menu at the terminal. The terminals can perform these procedures when they are offline. Later when the terminals are online, they send the results of these functions to the host.Note: The Procedures parameter must also be enabled for Local to work.Host Print When this parameter is enabled, the host can send extra data to the terminal’s screens, and instruct the terminal to print it. This is in contrast to the Local Print fea-ture, where the terminal makes the initial print request. The text that is passed to the printer is formatted into the 24 x 80 application screen. If the host can initiate the print operation, the text is printed. The 9150 identifies the additional text as a print page by the presence of the word “PRINT” (in capital let-ters) beginning in the 2nd column of line 13 on the 24 x 80 screen. The word “PRINT” should be defined as display-only text.The print page is positioned below the terminal’s display page (see Figure 5.6 on page 103). The size of the print page is always the same as the terminal’s display page (assuming that in the terminal’s configuration, the page length is less than 12 lines). When Host Print is enabled, the 9150 passes the print page to the terminal after receiving the application screen from the host.
Teklogix 9150 Wireless Gateway User Manual 103Chapter 5: Mini-Controller Configuration5250/TelnetEmulation OptionsFigure 5.6 Application Screen With Print PageNotes:1. Unlike the Passthru option, when using Host Print no escape com-mands can be sent to the printer.2. Support for printing must be enabled at the terminal in its Printer command under the TESS Features menu; refer to the 7030/8055/8060 Terminals User Manual for more information.Remote Print When this parameter is enabled, the 9150 sends the print page to a terminal when-ever the terminal requests it (by sending the “F17” function key from the terminal, or the “PRINT” key on older terminals). The 9150 sends the function response back to the host. This is in contrast to Host Print, where the host makes the initial print request.Note: Support for printing must be enabled at the terminal level. Refer to the 7030/8055/8060 Terminals User Manual for more information. 1 2 3 4 5 6 7 8 9101112131415161718192021222324Display Page (8 x 40) Print Page (8 x 40) PRINT
Chapter 5: Mini-Controller Configuration5250/TelnetEmulation Options104 Teklogix 9150 Wireless Gateway User ManualPages This parameter determines the number of host screens (or pages) stored at the terminal, to a maximum of 16. The 9150 reduces data transmitted to the terminals by using the terminal’s capability to store a page of data for each screen it displays. The 9150 maintains an image of each page stored at the terminal. After receiving an application screen, the 9150 tries to match the screen with a stored page. If a similar page is already in the terminal’s memory, the 9150 instructs the terminal to re-display its copy of the page; only the necessary changes are sent from the con-troller. If no match is found, the complete page is sent to the terminal over theradio link.Note: There is a corresponding parameter on the terminal itself, and the actual number of saved pages will be the smaller of the two values.Transmit Line When this feature is enabled, all modified data at the terminal will be automatically transmitted when the operator enters data into a transmit-upon-entry field.The value in this textbox specifies the line on the screen which is designated the transmit line. The last entry field above or on the transmit line on the screen will be identified as the transmit-upon-entry field. If any entry fields exist on lines below the transmit line, no entry field will be designated as the transmit-upon-entry field.A value of 0 (zero) disables this feature. A value of 24 will cause the last entry field on each application screen to be defined as transmit-upon-entry.AIAG This parameter provides auto-locate and fill for input coming from bar code readers. When bar code data is entered at a terminal, the terminal searches for “AIAG” fields on the current page that can accept the bar code data. The data preloaded into the “AIAG” field by the application program determines whether or not the bar code data is accepted.At the 9150 mini-controller, a decimal value of an ASCII character from 0 to 127 is set to match the “AIAG Field Identifier” set at the host. A value of 0 disables this feature.
Teklogix 9150 Wireless Gateway User Manual 105Chapter 5: Mini-Controller Configuration5250/TelnetEmulation OptionsThe format of the preloaded data is as follows:<mode> <AIAG prefix(data)>The mode character used with the command allows for different operating modes to suit various application operations. The automatic locate and fill operation applies only to data received from a bar code reader. Descriptions of the modes and AIAG prefix are listed in the table below. These modes are set at the host.Table 5.3 Mode Functions And AIAG Prefix DescriptionMode Function0Display prefix, send prefix to host.1Do not display prefix, send prefix to host.2Display prefix, do not send prefix to host.3Do not display prefix, do not send prefix to host.+4Add 4 to above values to cause transmit to host when all AIAG fields with 4 set are filled. Function 0 is “pressed” if there are any fields with this bit set, and all fields with this bit set have been filled by operator input.+8 Add 8 to above values to allow overwrite of previously entered data.+16 Add 16 to above values to indicate cursor position priority for search and fill.AIAG Prefix (data) The text to be matched in the AIAG field.
Chapter 5: Mini-Controller Configuration5250/TelnetEmulation Options106 Teklogix 9150 Wireless Gateway User ManualExample: The information in the sample screen below is defined at and sent from the host. It includes the “AIAG Identifier” – the tag identifying this as an AIAG field – followed by the mode, in this case Mode 0, and finally, the “AIAG Prefix” – I.Figure 5.7 AIAG Field Sent From The HostWhen the information arrives at the terminal screen, the appropriate AIAG field for the scanned information is located using the “AIAG Identifier”. Because Mode 0 was set at the host, the “AIAG Prefix” – I – is displayed on the terminal screen, and when this screen is completed, the prefix will be sent back to the host.Figure 5.8 AIAG Field Sent To The TerminalVisible Match Character By inserting a special ASCII character directly before an entry field, the application program distinguishes a “match field” from an entry field. For example, suppose an angle bracket “>” is defined for visible match fields. Inserting “>” immediately preceding the entry field identifies it as a match field, as illustrated below.Part #> ___________Item No. @0AIAG Information From HostAIAG Prefix (data)ModeAIAG Field IdentifierIItem No. IAIAG Information From Host To Terminal Screen@AIAG Prefix (data)AIAG Field Identifier
Teklogix 9150 Wireless Gateway User Manual 107Chapter 5: Mini-Controller Configuration5250/TelnetEmulation OptionsThe range for this parameter – 0 to 127 – represents the decimal values of ASCII characters. A value of 0 disables this feature. The ASCII decimal value entered at the 9150 must coincide with the value set by the application program.To use the Visible Match feature, the host computer preloads data into a match entry field; the data is visible on the terminal screen. The preloaded data sent to a terminal can consist of exact characters, special match characters or a combination of the two. Refer to the table below for match characters recognized by Teklogix terminals.If an entry does not match the preloaded data, the entry is displayed, the terminal beeps, and the cursor moves to the first position in the match field. The operator can either make another entry in the match field, or move the cursor to a new field. When an entry (even one that doesn’t match the preloaded data) is made in a match field, the entry is sent to the host as part of the terminal’s modified data during the next transmission.Table 5.4 Match CharactersCharacter Description#Match a number.&Match a letter (either case).^Match an uppercase letter._Match a lowercase letter.|Match an alphanumeric character."Match a letter, number or space.?Match a punctuation character.'Match any character.:Match all character positions in the field with the preceding character.;Match any remaining characters, but not necessarily the remainder of the field, with the preceding character.
Chapter 5: Mini-Controller Configuration5250/TelnetEmulation Options108 Teklogix 9150 Wireless Gateway User ManualExample: Suppose you want to preload an entry field with a part number. If the part number is known, you can preload the field with that part number. If more flexibility is needed, and the part number always begins with two alphabetic characters followed by a hyphen and four digits, the match string for the field would be: &&–#### .Hidden Match Character Unlike data in a “visible match” field, the preloaded data in a “hidden match” field is not displayed at the terminal.Note: Refer to “Visible Match Character” on page 106 for detailed information about field matching.The range for this parameter – 0 to 127 – represents the decimal values of ASCII characters. A value of 0 disables this feature. The ASCII decimal value entered at the 9150 must coincide with the value set by the application program.Serial I/O Serial I/O fields are special entry and fixed fields that accept input from and output to a serial port. The application program distinguishes this field as Serial I/O by pre-ceding the field with a special character. If this character precedes a fixed field, the data will be sent to the terminal’s serial port. If it precedes an entry field, the field accepts data from the terminal’s serial port.The range for this parameter – 0 to 127 – represents the decimal values of ASCII characters. A value of 0 (zero) disables this feature.Print Line This parameter allows you to enter the starting line number of the print page in the application screen. A value of 1 causes the display page to be printed; a value of 0 (zero) disables this feature.Print Form LengthThis parameter sets the printer’s form length in lines. The range is 0 to 24.
Teklogix 9150 Wireless Gateway User Manual 109Chapter 5: Mini-Controller Configuration5250/TelnetEmulation OptionsBarcode Barcode-input-only fields are special entry fields that only accept input from a bar code reader. The application program distinguishes an entry field as barcode-input-only by preceding the field with a special character. The range for this parameter – 0 to 127 – represents the decimal values of ASCII characters. A value of 0 (zero) disables this feature.Entry Line This parameter contains the number of the first line displayed if there is no entry field in the upper-left portion of the screen, and if an entry field is at or below this line.The Entry Line parameter allows an automatic offset within the host screen, so that the area displayed by the terminal includes an entry field that would normally be out of bounds. Normally, Teklogix terminals only display the upper-left corner of the application screen because of their smaller display size.Field Overhead This parameter contains the maximum number of characters allowed between two fixed fields which still allows the 9150 to join them into one field.Sometimes the 9150 will join two adjacent fixed fields and then send them as one field. This reduces the overhead on the radio link. For example, if two fields were 4 characters apart and this parameter was ‘5’, then these fields would be joined into one.Command Region This parameter defines a region of the host screen which the 9150 will examine for the presence of reserved commands. The four numbers in the Command Region textboxes represent the row and column addresses of the upper left corner and the lower right corner of the command region. The first textbox of each pair contains the row number; the second contains the column number. The range of row values is 0 to 24; column values are 0 to 80. To define the last two lines of the host screen as the command region, for example, enter the values 23, 1 and 24, 80.
Chapter 5: Mini-Controller Configuration5250/TelnetProtocol Options110 Teklogix 9150 Wireless Gateway User ManualCurrently, the only command supported is ALARM (refer to page 100 for details on this command). When the word “ALARM” is placed anywhere within the command region, the 9150 will send a TESS beep command to the terminal.5.3.4.2 Protocol OptionsThis page differs depending on the type of emulation and protocol selected in the General Host Options page. The 9150 displays this version of the Protocol Options page when you select the emulation/protocol combination of 5250/Telnet for this host.Terminal Type This parameter allows you to choose the type of terminal to be emulated by the 9150 for this host. At present there are two choices of terminal for 5250/Telnet: the IBM 5251-11 and IBM 5555-B01.Host Port This parameter allows you to enter a host port value for the selected 5250/Telnet host connection. The default value is 23.
Teklogix 9150 Wireless Gateway User Manual 111Chapter 5: Mini-Controller Configuration5250/TelnetProtocol OptionsMaximum Sessions per Terminal This parameter contains the maximum number of telnet sessions which are allowed to originate from each terminal. The range is 0 to 127, with a default value of 4.First Local Terminal Port This parameter contains the port number from which the first terminal will connect on outbound telnet sessions. The default value is 0.Local IP Address to Bind This parameter contains the IP address of the network adaptor from which the first terminal will connect on outbound telnet sessions.First Terminal Listen Port This parameter specifies the first port number at which the 9150 will listen for telnet connection requests to the terminals. The default value is 0.Actively Negotiate with Host If this parameter is enabled, the 9150 negotiates with the host during setup of the telnet connection.
Chapter 5: Mini-Controller Configuration5250/TelnetFunction Key Mappings112 Teklogix 9150 Wireless Gateway User Manual5.3.4.3 Function Key MappingsThis page differs depending on the type of emulation selected in the General Host Options page. The 9150 displays this version of the Function Key Mapping page when you select 5250 emulation for this host.Function key n The Function Key parameter allows you to select a code that will be sent to the host when you press a function key on the terminal. Each function key may be chosen from the same range of possible codes; however, each function key has a different default code. The default values are shown on this page.
Teklogix 9150 Wireless Gateway User Manual 113Chapter 5: Mini-Controller ConfigurationANSI/TelnetEmulation Options5.3.5 ANSI/Telnet 5.3.5.1 Emulation OptionsThe 9150 displays this version of the Emulation Options page after you have selected the ANSI/Telnet emulation/protocol combination for this host connection.Host Timeout The Host Timeout is the interval (in ticks, or 60ths of a second) between bursts of data received from the host. The range is 0 to 255, with a default value of 15.If the 9150 does not receive any characters from the host after this timeout has elapsed, it assumes that the host has finished sending data and is waiting for user input (in other words, it assumes that a screen of data has been completed).Important: The Page parameter (page 115) must be enabled in order to change the value in the Host Timeout parameter.
Chapter 5: Mini-Controller ConfigurationANSI/TelnetEmulation Options114 Teklogix 9150 Wireless Gateway User ManualEscape Timeout The Escape Timeout is the length of time (in ticks, or 60ths of a second) that the 9150 will hold an “ESC” received from the host, and consider the next received byte to be part of an escape sequence. The range is 0 to 255, with a default value of 12.When this timeout has elapsed, the host will have to send another “ESC” character to start an escape sequence.Note: This is especially important when an ESC is at the end of a data packet.Threshold The Threshold is the minimum number of bytes of update data for the terminal screen which must be received from the host before the 9150 will store the screen as a new “saved page”. The range is 0 to 999, with a default value of 200.Important: The Page parameter (page 115) must be enabled in order to change the value in the Threshold parameter. Echo If this parameter is enabled, the 9150 uses “Smart” Echo. This mode reduces the amount of data sent to the terminal by decreasing the number of radio transmissions.Ordinarily, when a character mode application is being used, each keystroke is sent to the host in one transmission, and the character is echoed by the host in another transmission. When “Smart” Echo is enabled, the 9150 will not send the host echo to the terminals if it matches the data sent from the terminal. Thus, the number of radio transmissions is reduced.This mode also reduces or eliminates the delay between typing a character on the keyboard and displaying the character echoed by the host. The maximum number of characters waiting for echo is 25. Any additional characters will be sent to the host but not displayed.Notes:1. This parameter also determines whether an ANSI parameter query is sent to the terminal.2. “Smart” Echo also needs to be enabled at the terminal (refer to the7030/8055/8060 Terminals User Manual).
Teklogix 9150 Wireless Gateway User Manual 115Chapter 5: Mini-Controller ConfigurationANSI/TelnetEmulation OptionsANSI If this parameter is enabled, the 9150 uses ANSI escape code filtering. When escape-code filtering is enabled, ANSI escape codes not supported by the terminals will be filtered out of the data stream to reduce radio traffic. The terminals currently support most, if not all, standard ANSI escape sequences, so this parame-ter should be disabled in most cases.Function Key Remapping If this parameter is enabled, the 9150 remaps the function keys for this host connection as defined in the Function Key Remapping page (page 121).Page If this parameter is enabled, the 9150 uses page saving, reducing data transmitted to the terminals. The 9150 maintains an image of each page stored at the terminal. After receiving an application screen, the 9150 tries to match the screen with a stored page. If the page is already in the terminal, the 9150 instructs the terminal to redisplay its stored copy of the page; no data need be sent across the radio link for that page. If the 9150 finds no match for the page, the complete page is sent to the terminal.Note: When page saving is enabled, the number of saved pages is that which is set on the terminal. Refer to the 7030/8055/8060 Terminals User Manual for details.RLE If this parameter is enabled, the 9150 uses run-length encoding (RLE) on the data it sends across the radio link. RLE compresses repeated characters going from the host to the terminal. If repeated characters are found in the data stream, the first one is sent, followed by a short escape sequence (3 or 4 characters) which tells the terminal how many times to repeat this character. In this way RLE compresses the data and decreases the total amount of radio-link traffic.Convert 7 to 8 Bits If this parameter is enabled, the 9150 converts 7-bit control sequences to their 8-bit equivalents in ANSI data streams going to the terminals. This replaces two-charac-ter escape sequences with a single equivalent character, compressing the data.
Chapter 5: Mini-Controller ConfigurationANSI/TelnetProtocol Options116 Teklogix 9150 Wireless Gateway User Manual5.3.5.2 Protocol OptionsThis page differs depending on the type of emulation and protocol selected in the General Host Options page. The 9150 displays this version of the Protocol Options page when you select the emulation/protocol combination of ANSI/Telnet for this host.
Teklogix 9150 Wireless Gateway User Manual 117Chapter 5: Mini-Controller ConfigurationANSI/TelnetProtocol OptionsTerminal Type This parameter specifies the type of terminal to be emulated by the 9150, either a VT100 or VT200.Host Port This parameter specifies the value for the host port for the selected ANSI host con-nection. The default value is 23.Maximum Sessions per Terminal This parameter contains the maximum number of telnet sessions which are allowed to originate from each terminal. The range is 0 to 127, with a default value of 4.First Local Terminal Port This parameter specifies the port number from which the 9150 attempts a telnet con-nection for the first terminal. The default value is 0.Additional telnet sessions are assigned higher port numbers.Local IP Address to Bind This parameter specifies the IP address of the 9150 interface that connects to this host. It is used along with the local port numbers to create a unique socket for each terminal session. First Terminal Listen Port This parameter specifies the lowest port number at which the 9150 listens for telnet connections initiated by the host. The default value is 10000.TCP Session Request Key This parameter contains the decimal ASCII character code of the character which will prompt the terminal to request a new ANSI terminal session. The range is 0 to 255, with a default value of 1.
Chapter 5: Mini-Controller ConfigurationANSI/TelnetProtocol Options118 Teklogix 9150 Wireless Gateway User ManualSession Cycle Key This parameter contains the decimal ASCII character code of the character which will prompt the terminal to display the next ANSI terminal session. The range is 0 to 255, with a default value of 2.Last Active Session Key This parameter contains the decimal ASCII character code of the character which will prompt the terminal to display the last ANSI terminal session. The range is 0 to 255, with a default value of 5.Auto-telnet/login Enable This parameter enables you to disable or enable automatic connection of telnet ses-sions from terminals to this host. The choices provided are: Disable; Enable Auto-telnet; Enable Auto-telnet/login. The default value is Disable. When Auto-telnet is disabled, telnet sessions from the terminals to the host must be initiated manually from the terminals.When Auto-telnet is enabled, the 9150 initiates one telnet session from each termi-nal whose terminal number is mapped to this host. Additional telnet sessions may be initiated from each terminal to the host, but they must be initiated manually.Note: Auto-telnet sessions are only initiated for terminals which are “online” (turned on and operating properly on the Teklogix RF network).When Auto-telnet and Auto-login are enabled, the 9150 initiates one telnet session from each terminal whose terminal number is mapped to this host. It then logs each session in to the host using the User ID and Password provided in this page. Note: The User ID and Password is identical for all Auto-telnet sessions automatically logged in to this host.
Teklogix 9150 Wireless Gateway User Manual 119Chapter 5: Mini-Controller ConfigurationANSI/TelnetProtocol OptionsAuto-telnet Host This parameter contains the host name or IP address for the host to which the 9150 connects Auto-telnet sessions. Note: A host name placed in this textbox must be “resolvable” by the 9150: the 9150 must be able to obtain an IP address for it. For example, the host name may correspond to an entry in the 9150’s host table, or the 9150 may be able to query a domain-name server. Any host name which can be used at the terminal’s TCP> prompt may be used here.Auto-telnet Terminal Prompt This parameter contains the text presented to the user to request a login. The charac-ters can be any ASCII string, with a maximum of 32 characters. The default is no text, just press <ENTER> to login.Auto-login User ID This parameter contains the user ID presented by the 9150 to the host for the Auto-login sessions. The characters can be any ASCII string acceptable to the host, with a maximum of 15 characters. Auto-login Password This parameter contains the password presented by the 9150 to the host for the Auto-login sessions. The characters can be any ASCII string acceptable to the host, with a maximum of 15 characters. Auto-login User ID prompt The 9150 compares the text in this textbox to the text presented to it by the host. When they match, the 9150 assumes that the host has just sent its request for a user name, and it sends the user ID specified in the Auto-Login User ID parameter to the host. The characters can be any ASCII string, with a maximum of 15 characters. The default text is gin: . Note: The match string should be as short as possible, yet long enough to uniquely identify the user-ID prompt. Do not include multi-part words separated by space characters, since some hosts send out characters other than space characters to present a space on the screen.
Chapter 5: Mini-Controller ConfigurationANSI/TelnetProtocol Options120 Teklogix 9150 Wireless Gateway User ManualAuto-login Password prompt The 9150 compares the text in this textbox to the text presented to it by the host. When they match, the 9150 assumes that the host has just sent its request for a pass-word, and it sends the password specified in the Auto-Login Password parameter to the host. The characters can be any ASCII string, with a maximum of 15 characters. The default text is word: . Note: The match string should be as short as possible, yet long enough to uniquely identify the password prompt. Do not include multi-part words separated by space characters, since some hosts send out characters other than space characters to present a space on the screen.Auto-login failed login The 9150 compares the text in this textbox to the text presented to it by the host. When they match, the 9150 assumes that the host has just sent a string informing the terminal of a failed login attempt. The 9150 then presents the Auto-telnet Terminal Prompt on the terminal’s screen to request the user to login manually. The characters can be any ASCII string, with a maximum of 15 characters. The default text is incorrect . Note: The match string should be as short as possible, yet long enough to uniquely identify the failed-login prompt. Do not include multi-part words separated by space characters, since some hosts send out characters other than space characters to present a space on the screen.
Teklogix 9150 Wireless Gateway User Manual 121Chapter 5: Mini-Controller ConfigurationANSI/TelnetFunction Key Mappings5.3.5.3 Function Key MappingsThis page differs depending on the type of emulation selected in the General Host Options page. The 9150 displays this version of the Function Key Mapping page after you have selected the ANSI/Telnet emulation/protocol combination for this host connection.
Chapter 5: Mini-Controller ConfigurationANSI/TelnetFunction Key Mappings122 Teklogix 9150 Wireless Gateway User ManualFunction key n The Function Key parameter allows you to select a code that will be sent to the host when you press a function key on the terminal. Each function key may be chosen from the same range of possible codes; however, each function key has a different default code. The default values are shown on the screen on page 121.

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