2 - OPERATION
Loops Management
On remote sites, two local outgoing loops (Local user outputs A and B) are activated on the appearance of a local : equipment alarm or remote indication loops 3 and 4 (Local user input #3 or #4).
The remote loopback function allows an equipment named " central site", to register faults present on remote sites.
This function requires each site to transmit to the central site an alarm presence message. This messages which corresponds to remote monitoring loopback 1 or 2 (Local user input #1 or #2) is transmitted in the S1 byte. To link this message to equipment's alarms, the outputs of the A and B loops (Local user outputs A and B) should be connected to remote monitoring loops 1 and 2 (Local user input #1 or #2) respectively.
Data chaining in a bus or ring type network architecture is provided by "OR" function validation between the data received (Far user inputs #1 et #2) via S1 STM1 West and S1 STM1 East, and local data, for each site in the network.
At the "central site" equipment, "OR" function validation between the data received (Far user inputs #1 and #2) via S1 STM1 West and S1 STM1 East, and local data (Local user input #1 or #2 and local alarm), enables local alarm loopbacks to be activated (Local user outputs A and B).
To configure the remote loopback function, the following parameters should be programmed : "Line remote loopback" and " central site".
The Figure
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ADR 155C 3
Local user inputs
Figure 2-3 – Remote loopback function (registering alarms on central site)
NOTE : Status of :
-incoming loops (Local user inputs #1 to #4),
-far incoming loops (Far user inputs #1 to #2),
-and outgoing loops (Local user outputs A and B), may be displayed on HTTP navigator.
Installation and User Guide - N56717020101
No reproduction or communication without the written consent of SAGEM SA | Page |
