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HONEYWELL 51109684-100電源卡件
在所有此類情況下軟件命令覆蓋QDATA配置文件設置，但不將新設置存儲到EEPROM中。因此，當電源關閉時，覆蓋值丟失，當終端打開時，QDATA參數將再次使用。如果希望軟件命令永久覆蓋QDATA配置文件設置，可以使用將參數存儲到EEPROM命令。這會將所有當前設置的參數保存到EEPROM，使其成為當前開機默認值。2.1.3字符、鍵和LED編號許多命令涉及某些光標位置、鍵或LED。圖2-1顯示了這些編號的方式。軟件命令使用開機設置（參見第1章）和配置文件下載（參見第3章）配置QTERM-II后，可以對主機進行編程，以使用軟件命令控制QTERM-II。表1-3列出了可用的命令。下面詳細討論了每個命令，附錄C中給出了命令摘要，包括執(zhí)行時間。本章中的符號“ESC”總是指單字節(jié)轉義字符（1Bh=27十進制），而不是三個字母的ASCII字符串。2.2.1鈴聲（^G）-07h這會導致蜂鳴器發(fā)出嘟嘟聲。默認蜂鳴聲持續(xù)時間（1/2秒）在QDATA文件中設置；它可以用設置蜂鳴器持續(xù)時間命令（ESC e）覆蓋。請注意，發(fā)送此命令與發(fā)送蜂鳴器開/關/蜂鳴聲命令（ESC O B）相同。2.2.2退格（^H）-08h導致非破壞性退格，即當光標在字符上退格時，字符不會被擦除。關閉自動換行模式后，退格將停止在當前顯示行的左邊緣。啟用自動換行模式時，光標將換行到上一行的最后一個位置。如果光標位于起始位置，則忽略該命令。另請參見刪除命令（7Fh）。
水平制表符（^I）-09h
將光標向右移動到下一個選項卡列。默認制表符間距在QDATA文件中設置；可以使用“設置制表符間距”命令（ESC G）覆蓋它。（QDATA默認的制表符間距為每4個空格。）啟用自動換行功能后，當光標在當前行的最后一列之外換行時，光標將向下換行到下一行的第一列。如果禁用自動換行，光標將停在當前行的末尾。如果自動滾動和自動換行都處于啟用狀態(tài)，則當光標在最后一行的最后一列之外切換時，顯示屏將向上滾動。2.2.4換行（^J）-0Ah將光標下移一行，而不更改其水平位置。當自動滾動模式打開且最后一行執(zhí)行換行時，顯示器將向上滾動，水平光標位置不變。將光標移動到當前行顯示的左邊緣。如果啟用自動換行模式，則光標將移動到下一行的左邊緣。如果自動滾動和自動換行都打開，最后一行上的回車將導致顯示器向上滾動，光標位于最后一行的左邊緣。2.2.8 XON（^Q）-11h使QTERM-II能夠傳輸接收到XOFF后按下的密鑰。XON用于在XOFF禁用QTERM-II傳輸后重新啟用它，從而允許與主機系統(tǒng)握手。2.2.9 XOFF（^S）-13h禁用所有QTERM-II傳輸，通過查詢狀態(tài)命令（ESC W）請求的信息除外。接收到XOFF命令后，QTERM-II將鍵盤上輸入的字符存儲在傳輸緩沖區(qū)中。當接收到XON時，將傳輸這些字符。如果在收到XON之前緩沖區(qū)已滿，則會忽略鍵入的其他字符。
In all such cases
the software command overrides the QDATA configuration file setting but does not store the new setting into EEPROM. Therefore, when power is turned off, the overriding value is lost, and when the terminal is turned on, the QDATA parameter will be used again. If you wish to have the software command permanently override the QDATA configuration file setting, you can use the Store Parameters to EEPROM command. This saves all currently-set parameters to the EEPROM which makes them the current power-on defaults. 2.1.3 Character, Key and LED Numbering Many of the commands refer to certain cursor locations, keys or LEDs. Figure 2-1 shows how these are numbered.Software Commands Once you have configured the QTERM-II using the poweron setup (see Chapter 1) and configuration-file download (see Chapter 3), you can program your host to control the QTERM-II using software commands. Table 1-3 lists the commands available. Each command is discussed in detail below, and a command summary, including execution times, is given in Appendix C. The notation "ESC" in this chapter always means the onebyte escape character (1Bh = 27 decimal) rather than the ASCII string of three letters. 2.2.1 Bell (^G) - 07h This causes the buzzer to beep. The default beep duration (1/2 second) is set in the QDATA file; it can be overridden with the Set Buzzer Duration command (ESC e). Note that sending this command is identical to sending the Buzzer On/Off/Beep command for a beep (ESC O B). 2.2.2 Backspace (^H) - 08h Causes a non-destructive backspace, i.e. characters are not erased as the cursor is backspaced over them. With auto wrap mode off, the backspace stops at the left edge of the current display line. With auto wrap mode on, the cursor will wrap to the last position on the previous line. The command is ignored if the cursor is at the home position. See also the Delete command (7Fh).
Horizontal Tab (^I) - 09h
Moves the cursor right to the next tab column. The default tab spacing is set in the QDATA file; it can be overridden with the Set Tab Spacing command (ESC G). (The QDATA default tab spacing is every 4 spaces.) With auto wrap on, the cursor will wrap down to the first column in the line below when it is tabbed beyond the last column in the current line. If auto wrap is off, the cursor will stop at the end of the current line. If auto scroll and auto wrap are both on, then the display will scroll up as the cursor is tabbed beyond the last column in the last line. 2.2.4 Line Feed (^J) - 0Ah Moves the cursor down one line without changing its horizontal position. When auto scroll mode is on and a line feed is performed on the last line, the display will scroll up with the horizontal cursor position unaltered.Moves the cursor to left edge of the display on the current line. If auto line feed mode is on, then the cursor moves to the left edge of the next line. If auto scroll and auto line feed are both on, a carriage return on the last line will cause the display to scroll up and the cursor to be positioned at the left edge of the last line. 2.2.8 XON (^Q) - 11h Enables the QTERM-II to transmit keys pushed after receiving an XOFF. XON is used to re-enable QTERM-II transmission after an XOFF has disabled it, allowing handshaking with the host system. 2.2.9 XOFF (^S) - 13h Disables all QTERM-II transmission except for information requested via the Query Status command (ESC W). After receiving an XOFF command, the QTERM-II stores characterstyped on the keypad in a transmit buffer. These characters will be transmitted when an XON is received. If the buffer becomes full before an XON is received, additional characters which are typed will be ignored.
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