Alarms; Alarm Response - Siemens LDS 6 Operating Instructions Manual

Alarms

5.1

Alarm Response

LDS 6 is able to recognize and alarm for irregularities in its functions. There are five types of
alarms that can be triggered depending on the nature of the error:
● Maintenance request alarm
● Faults alarm
● Transmission alarm
● Limit alarm
● Function control alarm
Status Row
When the alarms limit (LIM), transmission limit (TR) or function control (CTRL) occur, their
corresponding square symbol in the status row will be lit (if this has been set up in function
53). If a Maintenance request or a Fault is triggered the text "Maintenance request" or "Fault"
will appear on the status line. This message is output alternately with the status messages.
"STO" and "CODE" may also appear in the status line, but these are not signaling for alarms
(see the chapter "Operation").
Table 5- 1
Logbook
3 Logbook Ch1 NH
S1 13-11-03 16:43 +
Optomodule Fault
S1 13-11-03 16:37 +
Optomodule Fault
W3 12-11-03 23:55 -
Signal quality
W3 12-11-03 23:54 +
Signal quality
...Continue
Page 1
Faults are considered to be more severe than other alarms and are therefore treated
somewhat different in the logbook. When a fault message first appears in the logbook it is
marked with a filled circle to the right. To inactivate the fault alarm the fault message must be
acknowledged by pressing the soft key next to it. This also removes the circle. The text in the
status line as well as the response by functions 71 and 77 will not change until the fault
message has been acknowledged. If the cause that triggered the fault alarm has not been
corrected, a new message will appear directly as soon as the first fault message is
acknowledged.
Every time a new message occurs, the report stored in the logbook is shifted by one memory
location. A total of 40 locations are available, and the oldest of the 40 reports is deleted
when a new one occurs. A power failure will delete all reports.
LDS 6
Operating Instructions, 01/2009, A5E00295894-05
At the same time that an alarm is activated (marked with a "+" sign) and inactivated (marked with
a "-" sign) a new message will appears in the logbook (function 3). The message will also show
the time when it was recorded in the logbook together with a short text describing the alarm.
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