User Guide
9
Valid modes by Operating System:
Modem Enable
SDC 7, SDC 8,
SDC 10, SDC 11
SDC 9
Standard OS (Array)
X
X
Table Data OS
X
PakBus OS
X
X
7.
Freewave Radio Application
Typically, the Freewave radios will be used in a PakBus network, with PakBus OS
dataloggers.
With a PakBus datalogger, the CS I/O port configuration on the SC105 should be
set to SDC 7, SDC 8, SDC 10, or SDC 11. The RS-232 baud rate should be set to
match the baud rate on the Freewave radios (38.4 k or 115 k are good choices).
If the low power modes of the Freewave radios are to be used, the SC105 DTR
and RTS mode setting will need to be configured to compensate for the turn-on
latency of the Freewave radio. The radio uses the RTS signal to go in and out of
its low power mode. The radio requires a delay from the time that it is brought out
of the low power mode and the time it receives data over the RS-232 port.
To do this, the default DTR and RTS mode will have to be changed to Custom
with RTS High = 100, and RTS Low = 20. This gives 100 ms between RTS HI
and data on the RS-232 port, and 2 seconds between data on the RS-232 port and
RTS going LO.
For a detailed application note on using Freewave Radios, see
PakBus Networking
with Freewave Radios
. This application note gives complete details on the set-up
of the datalogger, the SC105, the Freewave radio, and
LoggerNet
PC software for
this application.
