Campbell RF401A Series, Инструкция по эксплуатации

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RF401A-Series Spread Spectrum Radio
21
Power
Mode
Typical
Avg.
Current
Draw Description
0.5
Second
< 2 mA
The radio receiver is turned on every 0.5 seconds for
100 milliseconds to look for RF activity. The radio
transmits a 700 millisecond wakeup header with the first
transmission occurring after a period of RF inactivity.
This is the most common setting in networks that do not
contain CR200(X)-series dataloggers. The red LED
flashes every 0.5 seconds.
1 Second < 1 mA
The radio receiver is turned on every 1 second for 100
milliseconds to look for RF activity. The radio transmits
a 1.2 second wakeup header with the first transmission
occurring after a period of RF inactivity. This is the
most common setting in networks that contain
CR200(X)-series dataloggers. The red LED flashes
every 1 second.
8 Second < 0.3 mA
The radio receiver is turned on every 8 seconds for 100
milliseconds to look for RF activity. The radio transmits
an 8.2 second wakeup header with the first transmission
occurring after a period of RF inactivity. Only use this
setting in networks where time between communications
is long (hours) and saving an average an additional 1 to
1.5 mA is essential. The red LED flashes every 8
seconds.
11.1.9 Retry Level
An advantage of using one of the PakBus® protocol modes is that the radios
will retry packet delivery at the RF level. This setting specifies the level to
which the radio should retry to deliver an unacknowledged RF packet
transmission. When an RF packet fails to be acknowledged by the destination,
the radio will delay a random amount of time before resending the packet
again. A receiving radio responds to the sending radio with an ACK packet for
every radio packet it receives addressed to it with a valid CRC.
Retry Level Retry Count Random Delay Slots Transmit Timer
None 0 0 65535
Low 3 1 400
Medium 5 2 400
High 7 3 400
Set Retry Level to None when Protocol is set to Transparent for
the purpose of communicating with RF400/RF410 radios,
CR205/CR210 dataloggers, or RF401/RF411 radios and
CR206/CR211 dataloggers with Protocol also set to Transparent.
NOTE