XLINK 500/100 Operations & Maintenance Manual page # 104
The interval controls how frequently the transmission is made, and the time controls when the
transmission is started.
Example: Time 00:00:00 interval 00:10:00
00:10:00 transmission process starts
00:20:00 transmission process starts
00:30:00 transmission process starts
and every ten minutes afterwards…
Example: Time 00:00:30 interval 00:05:00
00:00:30 transmission process starts
00:05:30 transmission process starts
00:10:30 transmission process starts
and every five minutes
afterwards…
The transmission process is not instantaneous. At the scheduled time, the transmission process
will start. That process includes formatting the data content, powering on the modem, waiting
for the modem to acquire a good signal, etc. It usually takes less than one minute for the
transmission to start. If the modem is on prior to the transmission, it takes only a few seconds to
start. The Listening setting may be used to keep the modem on all the time.
Make sure to have the transmission scheduled a short while after the measurements are
completed. If the measurements happen at the 15 minute mark, set the transmission time to 16
minutes to ensure the measurements are completed before the transmission process starts.
10.1.5.
Alarm Transmissions
When setup for Alarm transmissions, the system will make transmissions as the station goes into
and optionally out of alarms.
The measurement setup for alarms should be configured with the Tx Data Content set to Last to
make sure that the reading that caused the alarms is transmitted.
Alarm Interval
The Alarm Interval setting is relevant to Alarm transmissions only. If not zero, the system will
repeat transmissions at the Alarm Interval for as long as the station is in alarm.
Additionally, if not zero, the Alarm Interval dictates the minimum time between transmissions. If
set to one hour, Alarm transmissions will not happen more than once an hour no matter how
often the station goes into alarms.
If the Alarm Interval is zero, alarm transmissions are made once when the station enters alarms,
and optionally a second time when the station goes out of alarms.
10.1.6.
TX Format
The TX Format field controls how the sensor data is formatted in the message. Each format has
its own distinctive advantages. Choices:
Pseudobinary B, C, and D
SHEF and SHEFFIX
ASCII Column