RSS-2-300W User Manual
23
RSS-2-300W Non-Contact Surface Velocity Radar
CSUM:
Checksum, calculated by adding in modulo 256 the two byte values of the ID. If the
device ID is 2, then ID was sent as <0x30><0x32>. Checksum is then 0x30+0x32 =
<0x62>.
After receiving the request, if the device ID matches, the surface velocity radar will respond with the
current averaged flow velocity reading:
<0xA5> ID SPEED CSUM
0xA5:
The first byte sent in the response is byte with HEX value of 0xA5.
ID:
Exactly two bytes long. This is the unit ID written as two ASCII characters. For
example, if the unit ID is 2, then ID will be sent as “02”. In HEX representation it is
the following two bytes: <0x30><0x32>.
SPEED:
The speed readout in currently selected units, formatted as real (float) number with
exactly three digits after the decimal dot separator. For example,
if the current averaged speed is 5.7143, it will be reported as 5.714, or in
HEX values: <0x35><0x2E><0x37><0x31><0x34><0x33>.
CSUM:
Checksum, calculated by adding in modulo 256 the two byte values of the ID and
all byte values from the SPEED.
Second possible command is send from the data logger to the surface velocity radar:
<0x2b> ID CSUM
0x2b:
The first byte sent in the request is ‘+‘character. Its ASCII value in HEX is 0x25.
ID:
Exactly two bytes long. This is the unit ID written as two ASCII characters. For
example, if the polled unit ID is 2, then ID will be sent as “02”. In HEX representation
it is the following two bytes: <0x30><0x32>.
CSUM:
Checksum, calculated by adding in modulo 256 the two byte values of the ID. If the
device ID is 2, then ID was sent as <0x30><0x32>. Checksum is then 0x30+0x32 =
<0x62>.
After receiving the request, device goes to power save mode.
Third possible command is send from the data logger to the surface velocity radar:
<0x2d> ID CSUM
0x2d:
The first byte sent in the request is ‘-‘character. Its ASCII value in HEX is
0x25.
ID:
Exactly two bytes long. This is the unit ID written as two ASCII characters. For
example, if the polled unit ID is 2, then ID will be sent as “02”. In HEX representation
it is the following two bytes: <0x30><0x32>.
CSUM:
Checksum, calculated by adding in modulo 256 the two byte values of the ID. If the
device ID is 2, then ID was sent as <0x30><0x32>. Checksum is then 0x30+0x32 =
<0x62>.
After receiving the request, device goes to normal operation mode from power safe mode.
Summary of Contents for RSS-2-300W
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