HI220957-31239英文使用说明,ABB控制模块
您可以输入大写或小写的命令名字符。特殊重启模式。请参阅特定正确模式的诊断。标有星号的测试集（*）在PPCBug 3.1版和更早版本中不可用。概述您可以使用工厂安装的调试监视器PPCBug来修改PowerPC板非易失性RAM中包含的某些参数（NVRAM），也称为电池备份RAM（BBRAM）。
HI220957-31239英文使用说明❏ NVRAM中的板信息块包含各种与硬件本身的操作参数有关的元素。使用PPCBug命令CNFG更改这些参数。❏ 使用PPCBug命令ENV更改可配置的PPCBugNVRAM中的参数。
CNFG和ENV命令均在PPCBug中描述附录D中列出的固件包用户手册，相关文档请参阅该手册，了解其使用和功能。以下段落提供了有关CNFG和特定于调试器的ENV，以及PPCBug参数
可以使用ENV命令配置。CNFG–配置电路板信息块使用此命令显示和配置电路板信息块，它位于NVRAM内。电路板信息块包含对应于特定操作的各种元素PowerPC板的参数。MVME2700的板结构如以下示例所示：引用的参数是左对齐字符（ASCII）字符串用空格字符填充，并显示引号（“）以指示字符串的大小。未引用的参数被视为数据字符串和数据字符串右对齐。填充数据字符串如果不满足长度，则使用零。电路板信息块在出厂前已配置。无需修改块参数，除非NVRAM已损坏。参考MVME2600/2700系列单板计算机程序员参考指南（适用于MVME2700）板信息块的实际位置和其他信息。有关说明，请参阅PPCBug固件包用户手册CNFG和示例。ENV–设置环境使用ENV命令以交互方式查看和/或配置所有PPCBug保存在非易失性RAM（NVRAM）中的操作参数。有关说明，请参阅PPCBug固件包用户手册ENV的使用。Universe II中寄存器的其他信息影响这些参数的ASIC可以在程序员的PowerPC板参考指南。
下面列出并描述了您可以配置的参数使用环境。显示的默认值是在以下情况下生效的值：出版物已付印。
Notes
1. You may enter command names in either uppercase or lowercase
characters.
2. Some diagnostics depend on restart defaults that are set up only in a
particular restart mode. Refer to the documentation on a particular
diagnostic for the correct mode. Test Sets marked with an asterisk
(*) are not available on PPCBug Release 3.1 and earlier.Overview
You can use the factory-installed debug monitor, PPCBug, to modify
certain parameters contained in the PowerPC board’s Non-Volatile RAM
(NVRAM), also known as Battery Backed-up RAM (BBRAM).
❏ The Board Information Block in NVRAM contains various
elements relating to the operating parameters of the hardware itself.
Use the PPCBug command CNFG to change those parameters.
❏ Use the PPCBug command ENV to change configurable PPCBug
parameters in NVRAM.
The CNFG and ENV commands are both described in the PPCBug
Firmware Package User’s Manual, listed in Appendix D, Related
Documentation. Refer to that manual for general information about their
use and capabilities.
The following paragraphs present additional information about CNFG and
ENV that is specific to the debugger, along with the PPCBug parameters
that can be configured with the ENV command.CNFG – Configure Board Information Block
Use this command to display and configure the Board Information Block,
which is resident within the NVRAM. The Board Information Block
contains various elements that correspond to specific operational
parameters of the PowerPC board. The board structure for the MVME2700
is as shown in the following example:The parameters that are quoted are left-justified character (ASCII) strings
padded with space characters, and the quotes (“) are displayed to indicate
the size of the string. Parameters that are not quoted are considered data
strings, and data strings are right-justified. The data strings are padded
with zeroes if the length is not met.
The Board Information Block is factory-configured before shipment.
There is no need to modify block parameters unless the NVRAM is
corrupted.
Refer to the MVME2600/2700 Series Single Board Computer
Programmer’s Reference Guide (applicable to the MVME2700) for the
actual location and other information about the Board Information Block.
Refer to the PPCBug Firmware Package User’s Manual for a description
of CNFG and examples.ENV – Set Environment
Use the ENV command to view and/or configure interactively all PPCBug
operational parameters that are kept in Non-Volatile RAM (NVRAM).
Refer to the PPCBug Firmware Package User’s Manual for a description
of the use of ENV. Additional information on registers in the Universe II
ASIC that affect these parameters can be found in the Programmer’s
Reference Guide for your PowerPC board.
Listed and described below are the parameters that you can configure
using ENV. The default values shown are those in effect when this
publication went to print.
