Troubleshooting Terminal, Printer, and Serial Device Connections - Edition 5 (32022-90058)

TermDSM Commands

DI[AG]

Chapter 4

seven write/read operations will not be run. If you answered no, all 10 write/read

operations will be executed regardless of the results of each test. The following is then

printed on the terminal:

Please connect and make ready (power on, remote mode, etc.)

a supported terminal, before answering the “How many times?”

question. (TDSM 114)

How many times do you want to repeat this operation?

You should prepare the terminal and then enter how many times you want to run this

diagnostic function. Enter a number between 1 and 65535. The following is then

displayed:

Type CONTROL_Y to stop the looping.

Any time that you want to stop the diagnostic, press

[CTRL]-Y

. The diagnostics prompt

will be printed and you will be allowed to enter another subcommand.

This diagnostic function tests the connection between the DTC port up to and including

some terminal functions. (It is not a thorough terminal test.) It does this by writing a

string of characters to the terminal and ordering the terminal to send those characters

back for comparison. The string of characters sent by TermDSM is preceded by:

[ESC]-H [ESC]-J

which homes the cursor on the screen and clears the screen. Then the character string:

ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_'abcdefghijklmnopqrstuvwxyz

is written to the terminal, followed by:

[ESC]-H [ESC]-D

which homes the cursor and causes the terminal to return the character string. (Sending

[ESC]-D

to the terminal is the same as pressing

[Return]

If TermDSM knows that this test has failed, an error message will be printed listing the

reason for the failure and how many milliseconds the test ran before failing.

The diagnostics prompt will be printed and you will be allowed to enter another

subcommand.

DI[AG] XI[NTERNAL]

Determines if the SNP hardware is functioning properly. The internal loopback test is

executed only if the SNP is not started. No external connections are required.

Security level: 2.

Syntax

XI[NTERNAL]

dtcnum,cardnum

Parameters

dtcnum

The number TermDSM associates with a particular DTC. The DTC

command lists each DTC with its assigned number. This list is also

printed when you make a mistake while typing in a DTC number.