Sur-Gard MLR2000, Руководство по установке

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Section 9 - CPM2000 Wiring Diagram
9.1 Loss of Socket/Automation
It is estimated that sockets may appear and disappear reg-
ularly as processes are terminated and reconstituted. After
5 seconds of loss the CPM2000 shifts to the next connec-
tion level. The connection level cases are.
As an Example of Source Destination
the Fall-down case
Table 1
Each slot may be populated by a selection. After 5 sec-
onds in a slot not running the CPM2000 will go to the
next running resource (i.e. actively polling) until 'END' is
encountered. When End is encountered the unit will con-
tinuously try to connect to the last entry. One of the
switched negative output on the CPM (PGMOUT 1) will
be activated when automation fails.
The Manual Restore rule is a command that may be issued
on the Sur-Gard console to jump back to the first entry.
The CPM and automation must connect to all resources
announced all the time. In the CPM's case this means that
a socket is presented for each automation to connect to.
9.2 CPM Redundancy
CPM's are directly redundant. The secondary CPM con-
stantly monitors the first CPM by observing polling events.
If the primary is considered failed either by loss or by
agreed upon takeover, the unacknowledged signals on
the systems line-cards are flushed out of the failed CPM.
As the secondary CPM resumes polling the previously
unacknowledged signals are re-transmitted from the line
card in chronological order.
9.3 CPM Restoral
All contemplated scenarios for recovery of a CPM except
watchdog restart involve a serviceman. It is expected that
CPM restoral will be manually switched from the console.
Slot 1 CPM A TCPIP Automation TCPIP
Slot 2 CPM A serial 1 Automation serial
Slot 3 END
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