Operation
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ASD 531, Technical description, T 140 416 en
8.5.2
Indicators on the AMB 31 main board
Various LEDs with the following meaning are on the AMB 31 main board (see also
•
LED “
Class
” and “
Holes
” flash = invalid constellation of rotary switches “
Class
” and “
Holes
”;
•
LED “
Mode
” = various functions (see Sec. 7.3);
•
LED “
WDog
” = watchdog display (processor not running
ASD has triggered a fault);
•
LED “
CardOk
” = SD memory card present;
•
LED “
Com
” = communication with the SD memory card.
8.5.3
SD memory card operation
The SD memory card is automatically detected when the device is switched on and when the card is inserted. From then on it
is monitored. Data logging begins automatically after approx. 10 s.
Warning
•
Only industrial SD memory cards tested and approved by the manufacturer may be used (see Sec. 12.1). The
use of a consumer SD memory card is to be avoided – this can lead to data loss or destruction of the
SD memory card and faults on the ASD.
•
Inserting the SD memory card: Before using the SD memory card, make sure it is blank (file interpretation).
•
Removing the SD memory card: To avoid data loss, log off the SD memory card on the AMB 31 (
Mode
rotary
switch, position
3
) before removing (see Sec. 7.3.8).
The SD memory card is inserted with the contact side facing toward the LMB circuit board and pushed into the holder until it
snaps into place. Pressing the SD memory card again releases the locking mechanism and the SD memory card can then be
removed from the holder.
The meaning of the “
CardOk
” and “
Com
” associated LEDs is described Sec. 8.5.2.
8.5.3.1
Data logging on the SD memory card
Smoke level and airflow values
: The smoke level and airflow values as well as the current status of the sampling tube net-
work for each sensing tube are written to the SD memory card every second and saved in
Log-files
(*.xls file). After 28,800
entries (corresponds to 8 hours) a new
Log-File
is generated automatically. A total of 251
Log-Files
(L000.xls to L250.xls) can
be generated for long-term logging. After the last
Log-File
the oldest one (L000.xls) is overwritten. The 251
Log-Files
cover
data logging for 83 days. The
log files
can be opened in Excel and the data processed with the diagram assistant to create
charts.
Events
: All events occurring in the ASD 531 are written to the
Event-Files
(*.aev file). After 64,000 events a new
Event-File
is
created automatically. A total of 10
Event-Files
(E000.aev to E009.aev) can be generated for long-term logging. After the last
Event-File
the oldest one (E000.aev) is overwritten. The 10
Event-Files
are sufficient to log over 640,000 events. The
Event-
Files
can be opened with a text editor. Please refer to Sec. 8.5.4 for the interpretation of the events.
8.5.4
Reading out the event memory
As soon as an SD memory card is used in the device (even when the SD memory card is present during device startup), the
content of the event memory is copied to the SD memory card.
8.5.4.1
Interpretation of the event memory
One event per line is listed in the
Event-File
. Besides the date and time of the event, a 2 x 3 digit code is listed. The first
3 digits (
group
) specify the event group as described in Sec. 8.5.4.2 (
000
=
G00
). The remaining 3 digits (
Event
) specify the
event code as described in Sec. 8.5.4.3.