COMSPHERE 3550 Series Data Service Units
Table
Lead States
Symbol | Meaning |
Off (below text line)
ON (above text line)
Changing
?Indicates an illegal value
NOTES:
Input leads A and B:
Off ( |
|
|
| ) when voltage on lead is less than +.8V. |
ON ( |
|
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| ) when voltage on lead is more than +2.2V. |
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|
|
Output leads are either ON or Off:
When output is set to Off ( |
|
|
| ), ±12V is applied to lead. |
When output is set to ON ( |
|
|
| ), +12V is applied to lead. |
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|
Reporting External Lead Changes to NMS
Changing either the output leads or the input leads changes the DSU's health and status message.
If the DSU is polled by the 6700 Series NMS, the NMS reports a change configuration notification (CCN) event. The NMS operator can then issue a CCN Display command to determine what caused the event.
•If the CCN event was caused by a change in the external leads, select Displ (F1) to see the current states of the leads.
•If a positive (+) voltage is detected in either one of the input leads, an external leads alarm is also reported.
Messages Branch
The Messages (Msgs) branch of the
To receive messages:
.Procedure
1.Press the F3 key (Msgs).
2.Select Read (F1).
3.If the message is less than 16 characters in length, the entire message is displayed.
If the message is greater than 16 characters, press
the 
key to scroll additional lines of the message onto the screen.
To clear (delete) messages:
.Procedure
1.Press the F3 key (Msgs).
2.Select Clear (F2).
The message is deleted, and Msgs no longer appears over the F3 key.
December 1996 |
