D2 Series
User Guide, Rev. 00 (Feb 2015)
18
ACK [ON/OFF]
: Available
only
if the
Broadcasting
and
Echo
options are
inactive
. If selected, the
sending unit waits an answer message from the target unit. If this answer is received before an
adequate time-out, the sending unit transmit the next message, otherwise repeats the same until a
valid answer from the target unit will be received. The maximum number of repetition of the
message is set in the
Repetion
field.
NAK to DTE [ON/OFF]
: Available
only
if
ACK
is activated. At the end of the repetition cycle if no
answer from target unit is received, the
NAK
character (ASCII
21
) is sent to the DTE.
Addr to DTE [ON/OFF]
: If selected, the data sent to the DTE are preceded by the address of the
sending unit.
Rx Addr for Tx [ON/OFF]
: Available
only
if
Addr from DTE
is
inactive
. If selected,
the unit stores the entire addressing data (source unit plus all digipeaters if used) of the last
incoming message and reutilises them for the answer.
Echo [ON/OFF]
: Available
only
if
ACK
and
Broadcasting
are
inactive
. It's a simply utility to verify
the radio link. If selected, the target unit receiving an "Echo" message don't release it to its serial
port but repeat it to the source unit that releases the message to its DTE.
Addr from DTE[ON/OFF]
: Available
only
if
Rx Addr for Tx
is
inactive
. If selected, the DTE must
manage the addressing of the message. The correct addressing is obtained sending, before of each
message, the appropriate address string. The addressing string contains from
3 to 11 bytes
depending on the route complexity. The necessary bytes are the following:
The
1st
is the
System Code byte
where the two most significant bits are the
Broadcasting
switch
(bit No. 7) and the
Echo
switch (bit No. 6). The admissible values are
1...63
.
The
2nd
byte is the
Number of units
in the route comprehending the
target
and
all the
digipeaters
.
The admissible values are
1...9
equivalent to one target unit and up to 8 digipeaters.
The successive bytes are the
digipeaters addresses
listed in the
exact sequence of use
.
The
last addressing byte
is the
target address
.
Finally the message to be sent with a maximum of
640 bytes
or
256 bytes
for the use in the
RMO400 Compatible
mode.
Repetition [0..255]
: Available
only
if the
ACK
function is activated. It set the maximum number of
the repetition of the message if the answer from the target is not received.
PwSavOFF [0..240]
: The
OFF
time, in
steps of 10 milliseconds
, in the
Power Saving Cycle
. The
related
ON
time is of
70 milliseconds
. This time is used to calculate all the communication timings
therefore
must be
the same for
all the units
in the network. If the Power Saving is not desired, set
the PwSavOFF to
0
. The maximum allowable PwSavOFF time is of
2.40 seconds
.
PwSava [ 0..255]
: The waiting time, is
steps of 100 milliseconds
, to
return
in the
Power Saving
Cycle
after any transmitting or receiving cycle. If the Power Saving is not desired, set the PwSava to
0
. The maximum PwSava time is
254
, equivalent to
25.4 seconds
. The value
255
set the unit as
Master
in a point-multipoint network. This unit is
always active
but it can send messages with a
preamble length
defined by the
PwSavOFF
time.