Schweitzer Engineering Laboratories SEL-734, Инструкция по эксплуатации

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4.31
Date Code 20090730 Instruction Manual SEL-734 Meter
Metering
Load Profile Report
The SEL-734 reports binary LDP data in the format show in Table 4.17 .
The following definitions describe the LDP data format of the YMODEM
response.
Record Type
The Record Type identifies the type of data present in the data field of the
record with a range of 0x0000
–
0xFFFF. The SEL-734 reports this data in the
Big-Endian format with the most significant byte first.
Record Size
The Record Size is the length, in bytes, of the data field plus 2 bytes for the
check sum. The SEL-734 reports this data in the Big-Endian format with the
most significant byte first. The smallest record size possible is 0x0002 which
specifies a data field of 0 bytes in length and a check sum of 2 bytes. The
largest record size possible is 0xFFFF, which specifies a data field of 65,533
bytes in length and a check sum of 2 bytes.
Data Block
The Data Block defines the data payload of the record. The structure of the
data is dependent on the record type as defined by the
Record Types .
Table 4.16 LDP File Transfer Commands
Command Definition
FILE READ ldp_data.bin Retrieves the LDP settings and
configuration data. This does not include
the LDP data.
FILE READ ldp2_data.bin
FILE READ ldp3_data.bin
•
•
•
FILE READ ldp12_data.bin
Retrieves the LDP2–LDP12 settings and
configuration data. This does not include
the LDP2–LDP12 data. If the SEL-734
does not support LDP2–LDP12 data, it will
respond with:
File specified does
not exist .
FILE READ ldp_data.bin 1/1/00
00:00:00 Retrieves all LDP data, settings, and
configuration data.
FILE READ ldp_data.bin
MM/DD/YYYY HH:MM:SS
MM/DD/YYY HH:MM:SS Retrieves a specific date range of LDP data
which includes settings and configuration
data. To read a specific time and date range
of LDP data, simply add the start date and
end date to the
FILE READ command.
For example, to retrieve the LDP data for
January of 2009, issue the following
command:
FILE READ ldp_data.bin
01/01/2009 00:00:00 02/01/2008 00:00:00
Table 4.17 LDP Field Format
Offset Name Length (bytes) Binary Equivalent
0 to 1 Record Type 2 16 bit unsigned
2 to 3 Record Size 2 16 bit unsigned
4 to (4 + N – 1) Data Block N (0–65533) 8 bit unsigned
4 + N Record checksum 2 16 bit unsigned
Courtesy of NationalSwitchgear.com