Akytec MV210-101, User Manual

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Configuration and operation
akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover · Germany · Tel.: +49 (0) 511 16 59 672-0 · www.akytec.de
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4.7 Data logging
An archive is saved as a set of encrypted log files. A log file consists of a set of records separated by line
break characters (0x0A0D). Each record corresponds to one parameter and consists of fields separated by
semicolon. The format of the record is described in Tab. 4.4.
Table 4.4. Record format
Field Type Size Comment
Time binary 4 Byte In seconds, beginning from 01/01/2000, 00:00 (UTC+0)
Separator string 1 Byte Semicolon (;)
UID (parameter ID) string 8 Byte String of HEX characters with leading zeros
Separator string 1 Byte Semicolon (;)
Parameter value string
parameter
depending
String of HEX characters with leading zeros
Separator string 1 Byte Semicolon (;)
Parameter status binary 1 Byte
1 – value correct
0 – value incorrect, further processing not recommended
New line binary 2 Byte 0x0A0D
Log files are stored in a built-in flash memory, formatted as a file system with encryption. For flash memory
specifications see section “Flash memory” in Table 3.1.
If an archive overflows, the new entry will overwrite the oldest one in the archive.
The archiving parameters are described in Tab. 4.5.
To view all logged parameters, use the toolbar item
Device information in akYtecToolPro.
The archive can be read with via Modbus TCP using function 20 (Tab. D.3). This function allows reading one
or several records from one or several files in one request. For details on function usage see
Modbus speci-
fications
.
The file number in the Modbus request should be calculated as file ID + 4096. File indexing starts with zero.
The parameter
Last log file ID
contains the ID of the archive file to which the data was last written.
The time zone is not contained in the file but can be read from the parameter Time zone (Tab. D.1).
Table 4.5. Archiving parameters
Parameter Description Range Default value Access
Logging interval
Time interval with which the values of the
selected parameters will be recorded
10…3600 s 30 RW
Number of files Maximum number of archive files 10…300 100 RW
File size
Log file size in Bytes 200…2048 2048 RW
Last log file ID ID of the last written file 0…65535
−
R
4.8 Analog inputs
To configure the analog inputs, open the Analog inputs group in the parameter tree.
Table 4.6. AI parameters
Parameter Description Range
Default
value Access
Group
CJC
Reference junction compensation option
for thermocouples (Sect. 4.8.7)
On
/
Off On
RW
Maximum sampling rate
On – Sampling time is automatically
adjusted to the minimum possible for the
selected input signal (Sect. 4.8.1)
On
/
Off On
RW