Operating instructions

1892 1335 - Orion Radio Modem Operating Instructions - v2.9 / Aug 2009 13
Mode L - Data Logging
Logging mode is used where equipment at many sites produces information, and there is a
need to retrieve it periodically from a central location. At each site, an Orion Outstation stores
serial data presented to Serial Port A, and relays it to the Base when it is polled. The Base
polls addresses between one and the total number of sites, receiving the data and outputting
it on Serial Port A which is connected to external logging equipment. Alternatively, the data
may be output to Serial Port B and recorded to disk by the supplied GUI software.
v Neither a separate User Data channel nor telemetry input/output is available in
this mode.
Figure 6 illustrates the topology.
Figure 6 - One-to-many logging topology with Orion polling
The over-air protocol is fixed and transparent to the user.