GE 68K System manual ST Serial Test

	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.

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