GAI-Tronics SSM110 Card Rack Assembly - Manual (Page 16)

Pub. 42004-669L2E
SSM110 Card Rack Assembly Installation, Operation, Maintenance Manual Page: 14 of 26
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When a Group 1 message is acknowledged, it moves to Group 2. Messages are acknowledged by using a
switch on the access panel. Acknowledging a message on one access panel does not affect messages on
other access panels.
Messages leave the history buffer when any of the following occur:
• The condition restores
• An access panel operator presses the trouble remove switch (Group 2 messages only)
• The history buffer reaches its maximum capacity
NOTE
If the history buffer reaches its maximum capacity, the system first discards Group 2 messages starting
with the lowest priority type messages, oldest to newest. The system proceeds to the next higher priority
type, again discarding messages from oldest to newest. When there are no Group 2 messages, the system
discards Group 1 messages starting with the lowest priority type, from oldest to newest.
Access Panel Display
An access panel may have one display, with a maximum of two displays per system. Each display must
be configured with a history buffer. The system will display one text message at a time. The message is
displayed unless a higher priority message preempts it. The operator can scroll through Group 2
messages if there are no Group 1 messages.
There are two switches used for scrolling: PREVIOUS and A CK /N EXT . The A CK /N EXT switch
acknowledges Group 1 messages. If there are no Group 1 messages, the A CK /N EXT switch will scroll
through any Group 2 messages in the history buffer. A CK /N EXT displays the next message downward in
the buffer within the Group 2 priority scheme (the oldest message in the next level down). PREVIOUS
moves to the prior message within Group 2 messages.
System Printer
There is a maximum of one printer per system. The system sends messages to the printer when certain
conditions occur. The types of messages to print are configurable. This allows the operator to have a
chronological record of events that occur in the system. If the operator acknowledges a message, the
acknowledgment message prints.
Contents of a Status Message
The system displays or prints one status message at a time. The types of messages displayed are
dependent upon your configuration; however, the messages could include the following:
• Device fault and restore events
• Operational events (page or party line activity)