IS200HSLAH2ADE燃機(jī)模塊,GE使用方法教程
正確接地另一個需要考慮的問題是接地引腳的使用。有兩個標(biāo)有GND的引腳。針腳7是信號接地，必須連接到遠(yuǎn)程設(shè)備以完成電路。針腳1是底盤接地，但必須小心使用。機(jī)箱是通過中的綠色導(dǎo)線連接到電源接地電源線和必須連接到機(jī)箱才能進(jìn)入符合電氣規(guī)范。問題是，當(dāng)裝置連接到不同的電氣設(shè)備時插座，接地電位可能有幾伏的差異。
IS200HSLAH2ADE燃機(jī)模塊如果每個設(shè)備的針腳1通過電纜相互連接，可能會產(chǎn)生幾安培的電流。這種情況可能不會僅對典型電纜中的小導(dǎo)線有危險(xiǎn)，但可能還會產(chǎn)生電噪聲，導(dǎo)致數(shù)據(jù)傳輸錯誤。這就是為什么圖A-1顯示引腳1沒有連接。正常地針腳7應(yīng)僅在一個位置連接到機(jī)箱接地指向如果一臺計(jì)算機(jī)使用多個終端，則邏輯這一點(diǎn)的位置是在計(jì)算機(jī)上。端子不應(yīng)在邏輯接地回路和機(jī)箱之間建立連接。基于M68000的（68K）系列主板和系統(tǒng)級產(chǎn)品有一個共同的譜系，源自調(diào)試器固件當(dāng)前用于所有基于摩托羅拉M68000的系統(tǒng)CPU模塊177Bug包是一個強(qiáng)大的評估和調(diào)試工具對于圍繞基于MVME177的CISC構(gòu)建的系統(tǒng)微型計(jì)算機(jī)。設(shè)施可用于裝載和執(zhí)行在系統(tǒng)的完全操作員控制下的用戶程序當(dāng)使用177Bug時，您可以使用調(diào)試器進(jìn)行操作目錄或診斷目錄。如果您在調(diào)試器中目錄中，調(diào)試器提示“177 Bug>”顯示，您已經(jīng)您可以使用的所有調(diào)試器命令。如果你在診斷目錄，顯示診斷提示“177 Diag>”您可以使用所有的診斷命令以及所有調(diào)試器命令。您可以在使用Switch directories（SD）命令創(chuàng)建目錄，或者可以檢查您所在的特定目錄中的命令當(dāng)前通過使用Help（HE）命令進(jìn)入。由于177Bug是命令驅(qū)動的，因此它執(zhí)行各種響應(yīng)用戶在鍵盤上輸入的命令的操作。當(dāng)您輸入命令時，177Bug執(zhí)行該命令并提示再次出現(xiàn)。但是，如果您輸入一個命令導(dǎo)致執(zhí)行用戶目標(biāo)代碼（例如“GO”），然后控制可能或者可能不會返回177Bug，這取決于用戶的結(jié)果程序如果您使用了摩托羅拉的一個或多個其他調(diào)試包，您會發(fā)現(xiàn)CISC 177Bug非常相似。相當(dāng)大的還努力使交互式命令更加一致的例如，命令和之間的分隔符參數(shù)現(xiàn)在可以互換為逗號或空格。
Proper Grounding
Another subject to consider is the use of ground pins. There are two
pins labeled GND. Pin 7 is the SIGNAL GROUND and must be
connected to the distant device to complete the circuit. Pin 1 is the
CHASSIS GROUND, but it must be used with care. The chassis is
connected to the power ground through the green wire in the
power cord and must be connected to the chassis to be in
compliance with the electrical code.
The problem is that when units are connected to different electrical
outlets, there may be several volts of difference in ground potential.
If pin 1 of each device is interconnected with the others via cable,
several amperes of current could result. This condition may not
only be dangerous for the small wires in a typical cable, but may
also produce electrical noise that causes errors in data transmission.
That is why Figure A-1 shows no connection for pin 1. Normally,
pin 7 should only be connected to the CHASSIS GROUND at one
point; if several terminals are used with one computer, the logical
place for that point is at the computer. The terminals should not
have a connection between the logic ground return and the chassis.The firmware for the M68000-based (68K) series of board and
system level products has a common genealogy, deriving from the
debugger firmware currently used on all Motorola M68000-based
CPU modulesThe 177Bug package is a powerful evaluation and debugging tool
for systems built around the MVME177 CISC-based
microcomputers. Facilities are available for loading and executing
user programs under complete operator control for system When using 177Bug, you operate out of either the debugger
directory or the diagnostic directory. If you are in the debugger
directory, the debugger prompt “177-Bug>” displays and you have
all of the debugger commands at your disposal. If you are in the
diagnostic directory, the diagnostic prompt “177-Diag>” displays
and you have all of the diagnostic commands at your disposal as
well as all of the debugger commands. You may switch between
directories by using the Switch Directories (SD) command, or may
examine the commands in the particular directory that you are
currently in by using the Help (HE) command.
Because 177Bug is command-driven, it performs its various
operations in response to user commands entered at the keyboard.
When you enter a command, 177Bug executes the command and
the prompt reappears. However, if you enter a command that
causes execution of user target code (e.g., “GO”), then control may
or may not return to 177Bug, depending on the outcome of the user
program.
If you have used one or more of Motorola's other debugging
packages, you will find the CISC 177Bug very similar. Considerable
effort has also been made to make the interactive commands more
consistent. For example, delimiters between commands and
arguments may now be commas or spaces interchangeably.
