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12
ALARM SCAN
Reports the most recent alarm messages associated with the VLBRV Channel Module. After dis-
playing the messages, you have the option of deleting them.
CONTROL STATES SCAN
Displays the names and states of each channel control signal. Four possible signal states are report-
ed as follows.
ON - The control signal is logically ON, under control of channel-connected equipment.
OFF - The control signal is logically OFF under control of channel-connected equipment.
F-ON - The signal is forced to an ON state by the MEGAMUX PLUS system, either through the
configuration or diagnostics.
F-OFF - The signal is forced to an OFF state by the MEGAMUX PLUS system, either through the
configuration or diagnostics.
VLBRV ALARM SCAN
The Alarm Scan Routine allows you to display or print stored MEGAMUX PLUS alarm messages.
Up to 149 alarm messages can be saved by the system. Once 149 alarms are accumulated, each new
alarm replaces the oldest alarm stored in the alarm buffer. The alarm message reports the MEGA-
MUX PLUS node, component, and the time and date of alarm occurrence.
The alarm message format is illustrated by the following example:
NODE S :
NODE S indicates that the alarm message originated at Node S. CHANNEL indicates that the VL-
BRV Channel Card number at Node S is the location of the alarm condition. CFG ERROR is the
actual alarm, in this case, a configuration error. The date and time of alarm occurrence is displayed
to the right of the alarm message. Each channel alarm message is defined in Table 1. When Alarm
Scan is selected from the MEGAMUX PLUS Main Menu, an Alarm Scan Menu appears:
*--ALARM SCAN MENU--*
SCREEN DISPLAY
HARD COPY
DELETE DISPLAYED ALARMS
DELETE INACTIVE ALARMS
Each routine is described in the following paragraphs.
Screen Display
The screen display routine displays all stored alarms in a format suitable for the CRT screen. When
you select the routine from the Alarm Scan Menu, alarm messages are displayed until the screen is
filled; the next page of alarms (if any) is then displayed after a one-second pause. Press the Control
and S key simultaneously to freeze the display. Press the Control and Q key to continue after a Con-
trol S. Control X or the Return key returns you to the Alarm Scan Menu. You are not allowed to
clear the alarm buffer (Reset Displayed Alarms) until you have used this routine to display all
alarms.
036R660-E1
CHANNEL#3
CFG ERROR
10/21
04:47
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