Schweitzer Engineering SEL-351P, Quick Start Manual

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E-6 Compressed ASCII Commands Date Code 990215
SEL-351P Manual Técnico
z is “>“ for the trigger row, “*” for the fault current row and empty for all
others. If the trigger row and fault current row are the same, both characters are
included (e.g., “>*”).
HEX-ASCII Relay Word is the hex ASCII format of the relay word. The first element
in the relay word is the most significant bit in the first character.
If samples per cycle are specified as 16, the analog data are displayed at 1/16-cycle intervals and
digital data at 1/4 cycle intervals. The digital data are displayed as a series of hex ASCII
characters. The relay displays digital data only when they are available. When no data are
available, the relay sends only the comma delimiter in the digital data field.
If the specified event does not exist, the relay responds:
<STX>"No Data Available","0668"<CR><ETX>
The “ Names of elements in the Relay Word separated by spaces ” names are listed in the Relay
Word Bits table in section 9 of this manual.
A typical HEX-ASCII Relay Word is shown below:
"10000004986100000000000000F120280000000001020100000000000000240C0080000000000
00000000000"
Each bit in the HEX-ASCII Relay Word reflects the status of a Relay Word bit. The order of the
labels in the “ Names of elements in the relay word separated by spaces” field matches the order
of the HEX-ASCII Relay Word . In the example above, the first two bytes in the HEX-ASCII
Relay Word are “10”. In binary, this evaluates to 00010000. Mapping the labels to the bits
yields:
Labels
50A1 50B1 50C1 50A2 50B2 50C2 50A3 50B3
Bits 0 0 0 1 0 0 0 0
In this example, the 50A2 element is asserted (logical 1) ; all others are deasserted (logical 0).