REFERENCES
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2
2.4.2 Header
Position
This parameter defines the header position within the frame to be transmitted from
STAR Modem™ to the Host. The header can be positioned in either the first field of
the frame or in the field preceding the message:
FRAME
HEADER
Address
Address Delimiter
MESSAGE
HEADER
Time-Stamp
Time-Stamp-Del
Code Id
Code Len
DATA
Terminator
The Address field has different meanings depending on if the FRAME is a 2 way
answer to a previous 2 way transaction initiated by a STAR Modem™ Client, or if it
is a new message that an RF device sends to the STAR Modem™ Server. See par.
2.4.3 for details.
2.4.3 Address
Stamping
If enabled, this command includes the RF device or STAR Modem™ address in the
message/answer transmitted. It is advised to enable this parameter when
STAR Modem™ is a Server for more than one Client in 2 way transmission. In this
way the Host knows to which Client the answer must be sent.
If receiving data from an RF device working in 1 way mode, STAR Modem™ (Server)
automatically includes the RF device address in the message to be sent to the Host.
If receiving data from an RF device working in 2 way mode, STAR Modem™
(Server) automatically includes the RF device address in the message to be sent to
the Host. It is required to set the Host application to include the same address in the
answer to be transmitted back to the RF device.
Figure 5 - Receiving a Message from RF Device in 2 Way Mode
RF Dev. Addr + message
RF Device
in 2 way mode
RF Dev. Addr + answer
message
Server
answer