Svantek SVAN 979 - Description of Logger S Data Blocks

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SVAN 979 User Manual - Appendixes
Table B.1.25. Logger parameters
Word
number
Name
Comment
0
0nn0Fh
0Fh = block identifier
0nnh = block length in words
1
Ts
logger step in seconds
2
Tms
logger step in milliseconds; actual logger step in seconds is
expressed as:
T = Ts + Tms / 1000
3..4
LoggLength
total block size of recorded results in bytes
5..6
NofLoggRec
number of saved records
7..8
NofAllRec
number of all records measured during the entire measurement
9..10
reserved
11
MStUnitNumber
serial number of the monitoring station (if the parameter value is
equal to 0FFFFh this parameter is irrelevant)
12
MStUnitType
type of monitoring station (if parameter value is 0FFFFh this
parameter is irrelevant):
210 – SV 210 monitoring station
211 – SV 211 monitoring station
13
MStFirmwareVersion
firmware version number of the monitoring stations; for example, 123
means version 1.23 (if the parameter value is 0FFFFh this parameter
is not relevant)
14..15
MStIntTimeSec
meteorological results averaging time used in the monitoring station
in seconds (if the parameter value is 0FFFF'FFFFh this parameter is
negligible)
16..17
NofSummaryRes
number of records saved as the summary results
…
reserved
B.2. DESCRIPTION OF LOGGER'S DATA BLOCKS
The logger consists of data records of basic results that are recorded with a fixed logger step (see Table
B.1.23, Ts and Tms parameters) and various additional information blocks (markers). Markers contain
information about events that occurred during the registration process, as well as additional measurement
results independent of the basic results records. Markers can only appear between full base result records and
occur entirely asynchronously.
The identification of the logger block is based on the four highest bits of the first and last block words:
08xxxh – block of user markers,
09xxxh – reserved block,
0Axxxh – pause marker block,
0Bxxxh – marker block of discontinuity of basic results records,
0Cxxxh – other marker blocks.
In general, the rule is that in the first word of the block the bit b11 is deleted and in the last word the bit b11 is
set, except for the user marker block (08xxxh), because the block consists of only one word. If the highest four
bits of the start or end of a block word are not any of the numbers from 08h to 0Ch, then we are dealing with
a block of the basic result record. The table below shows the structure of the record of the basic results record
and the structure of the markers.