68K System Monitor

GE Energy Services

User's Guide

 

 

ST - Serial Test

Platform

Description

Syntax

þ CPM þ D20

þ D20 ME

þ D20/200

þ D20/200 ME

þ D25

D20 Base

D20 Base

CCU Base

CCU Base

 

Use this command to start one of these two serial port test procedures:

an automatic loop-back test of the defined serial port

transmits and receives a series of characters of different formats.

manually forcing the mark or space line states from the RS-232 drivers

allows you to monitor and adjust modem levels or frequencies.

Below is usage and syntax information for this command

Command Format

CPM / D20:

 

st /(f l) port

 

CCU / CCUME / D25:

st /(f l) port [baud]

 

 

 

 

Variables

/f

=

force mark or space states

 

/l

=

automatic loop-back test

 

 

 

 

Parameters

port

=

serial port to test (COM#)

 

baud

=

data rate in bps (decimal)

 

 

Example

Type st /l com7 9600 and press ENTER.

 

Results: This forces the RS-232 transmitter driver for

 

 

communications port seven (7) to perform the loop-

 

 

back test at 9600 bps.

 

 

The system displays the current state of the test.

 

 

Cancel the force test manually with CTRL-C.

 

 

The loop-back test terminates either on an error or on

 

 

completion of the test. The monitor displays the

 

 

prompt after stopping either test.

 

 

Special

These tests temporarily assume control of the specified

Considerations

communications port, and disrupt any current activity.

 

They may also, depending on the application, affect

 

subsequent operation.

 

 

To ensure that you avoid this, you must reboot the system

 

when you complete all testing.

 

 

 

 

 

Continued on next page

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General

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GE 68K System manual ST Serial Test