Sutron Corporation X-Link Operations & Maintenance Manual, Rev 1.63 5/24/2016 pg. 157
BLOCK IDENTIFIER
BLOCK-IDENTIFIER is always sent as B to indicate the start of a binary
data group.
GROUP ID
GROUP-ID is sent as B1 to indicate a scheduled transmission. Other
transmissions, including alarms, send 2.
OFFSET
Each record is prefixed with an <OFFSET>, which is a 1 byte binary
encoded number indicating the number of minutes ago the most recent
data was recorded. .
MEASUREMENT
DATA
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.
BATTERY VOLTAGE
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.
16.3.1.
Pseudobinary B Example
Here is a transmission with three active measurements; each one is set to
include two readings.
B1@@Gt@Gs@Sx@Sr@@i@@iI
|||| | | | | | |
|||| | | | | | |
|||| | | | | | |
|||| | | | | | +------------ Battery Voltage
|||| | | | | +--------------- Temp #2
|||| | | | +------------------ Temp #1
|||| | | +--------------------- Precip #2
|||| | +------------------------ Precip #1
|||| +--------------------------- Stage #2
|||+------------------------------ Stage #1
||+------------------------------- Delta Time
|+-------------------------------- Group ID
+--------------------------------- Block ID
16.4.
Pseudobinary C Data Format
This format is based on the pseudobinary B format. It uses slightly more
bandwidth than the B format, but it is self-descriptive. It is used when the user
selects P
seudobinary C
as the choice for
Tx Format.
