XLINK 500/100 Operations & Maintenance Manual page # 132
>TX1 TXFORM
Tx data would look like this
:BATT 2 #10 11.347 11.423 11.385 11.377 M M :TEMP 2 #10 26.00 25.25
25.75 26.00 M M :BL -1.00 :PWR -1.0/-1.0
Current message is 108 bytes (00:00:04 seconds) out of 2218 bytes
(00:01:00 seconds)
Available space is 2110 bytes
In that message, sensor data is 83 bytes
Worst case SENSOR data (excluding append) is 138 bytes (00:00:05
seconds)
Worst case available space is 2080 bytes
2 meas are active; 2 are marked for tx
>TX1 TXFORM REPEAT
:BATT 2 #10 11.347 11.423 11.385 11.377 M M :TEMP 2 #10 26.00 25.25
25.75 26.00 M M
12.3.3.
Automatic Missing Data Retrieval
Cell and Iridium transmissions may be automatically retired. Please see the
section.
12.4.
Retransmissions
XLink is able to make retransmissions (ReTx). Retransmissions are retries of failed scheduled
transmissions. The goal of retransmissions is to automatically retransmit data that was in the
failed transmissions.
12.4.1.
How Retransmissions Work
When a scheduled transmission fails, the system notes the time of the failure. Once a future
scheduled transmission succeeds, the system will proceed to re-transmit the data from the
missing transmissions.
Here is an example of retransmissions in action:
o
12:00 Scheduled transmission succeeds. All is well.
o
12:30 Scheduled transmission fails due to lack of network.
o
13:00 Another scheduled transmission fails.
o
13:30 Scheduled transmission succeeds. Network is back up.
o
13:31 Retransmission with data as if it were 12:30 completes.
o
13:32 Retransmission with data as if it were 13:00 completes. All previously missing
data has been transmitted.
o
14: 00 Scheduled transmission completes. Back to business as usual.
12.4.2.
Retransmission Setup
For retransmissions to take place, the setting
Retransmit
must be enabled. It is enabled by
default. A proper
Tx Format
is also needed to ensure that the data in the transmission is
timestamped. Pseudobinary B is the only unacceptable format. Use Pseudobinary D instead of
Pseudobinary B.
Enable
Retransmit
and choose any
Tx Format
but Pseudobinary B to take
advantage of Retransmissions.