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The benefit of using Pseudobinary D is being able to correctly decode data regardless of when it was sent
or received. This allows stations to re-transmit old data and have it correctly interpreted by the decoder
while keeping the message size at a minimum.
Name
Bytes
Description
Block identifier
1
BLOCK-IDENTIFIER is always sent as D to indicate that this is the
Pseudobinary D format.
Group id
1
GROUP-ID can be 1 to indicate a scheduled transmission, 2
meaning an alarm transmission, 3 indicating a forced
transmission, and 4 indicating a retransmission.
Day
2
This 2 byte encoded 6-bit binary encoded (see below) number
represents the Julian day of the year. The day tells when the
transmission was originally scheduled to take place.
Time
2
This 2 byte encoded 6-bit binary encoded (see below) number is
a number of minutes into the day. It tells when the transmission
was originally scheduled to take place.
Measurement
Data
3 for each sensor
reading
Measurement data collected: This data contains only those
measurements set up to be included in the transmission (see Tx
Data Content). The data values are 3-byte binary encoded signed
numbers allowing a range of -131072 to +131071. The actual 6-
bit binary encoded format is described later. The value
transmitted will be value * 10^RightDigits. The string /// will be
sent if the data was never measured or was erased.
All the required values for one sensor (most recent first) before
proceeding to the next measurement. This format is similar to
that used by the Sutron Satlink but different from the 8210.
There will be 3 bytes of encoded data for every sensor reading.
The number of readings depends on the user setup.
Additional
Measurements
Variable
If more than one measurement was set up for transmission,
more data will follow. Each measurement setup will have data
starting with the Measurement Delimiter and ending with
Measurement Data.
Battery voltage
1
This is the battery voltage measured prior to making the
transmission. The range of the number will be -32 to +31 and can
be converted to volts by multiplying by 0.234 and adding 10.6
allowing a range of 3.1 to 18.1 volts.
Append options
Variable
for details.
16.3.1
Example of Pseudobinary D
To help understand the message below here is a relevant bit of setup:
M1 Right Digits
2
Содержание SUTRON XLINK 100
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