User's Guide

DRAFT
Page 4-3
17 Mar 2016
23-15-87
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
ARINC 781-500 SDU and SCM
© Honeywell International Inc. Do not copy without express permission of Honeywell.
(a) Interface Requirements
A standard VT-100 compatible terminal running an emulator program (such as
HyperTerminal, ProComm Plus, or similar) provides the user interface to the SDU MPU.
The RS-232 terminal connection settings for SDU maintenance ports are listed in
Table 4 - 2 .
(2) Using the SDU MPU
This section describes the basic procedures for using and navigating the SDU MPU.
NOTE: There are various levels of access to the MPU. Each level is protected by a different
password. This section describes the MPU functions available using the Level 1
password.
(a) Entering Passwords
You can enter the password any time after the SDU boots.
• To access Level 1 functions, type menu.
NOTE: The password does not appear on the screen when you type it.
(b) Navigating the SDU MPU
• To scroll through the available menus, press CTRL+N.
• To go to the previous menu, press CTRL+O.
• To refresh the menu screen or exit from a Reports Menu, press ESC.
(c) Selecting Menu Items
• To enable test or data entry functions, press the letter associated with the menu items.
(d) Selecting Reports
The reports available through the MPU enable users to view information about the
configuration and status of the SDU. This information is used to troubleshoot the
communication system on the aircraft.
To access reports:
Table 4-2 Maintenance Port Connection Settings
Parameter Setting
Character Format ASCII
Baud Rate 19200 bps
No. of bits 8
Parity None
Stop bits 1
Flow Control None
DRAFT as of
4 Mar 2016