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.
Function 60 can be used to switch off the logbook and also to delete the messages stored in it.
LDS 6
Operating Instructions, 01/2022, A5E00295894-10
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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