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MDS 4710/9710 Technical Manual
MDS 05-3305A01, Rev. E
BAUD [xxxxx abc]
Data Interface Port
Baud Rate
This command sets (or displays) the communication attributes for the
DATA INTERFACE
port. It has no effect on the RJ-11
DIAG
port.
The first parameter (
xxxxx
) is baud rate. Baud rate is specified in
bits-per-second (bps) and must be set to one of the following speeds:
1200, 2400, 4800, 9600, or 19200.
The second parameter of the
BAUD
command (
abc
) is a three-character
block indicating how the data is encoded:
a
= Data bits (7 or 8)
b
= Parity (N for None, O for Odd, E for Even)
c
= Stop bits (1 or 2)
The factory default setting is 9600 baud, 8 data bits, no parity, 1 stop bit
(Example:
9600 8N1
).
NOTE:
7N1, 8O2, and 8E2 are invalid communication settings and are
not supported by the transceiver.
BUFF [ON, OFF] [xxx]
RX Data Buffer
This command sets or displays the received data handling mode of the
radio. The command parameter is either
ON
or
OFF
. The default is
ON
.
This command affects the timing of how
received RF data is sent out
from the
DATA INTERFACE
connector. Outgoing (transmitted) data is not
affected by this command.
If data buffering is
OFF
, the radio operates with the lowest possible
average latency. Data bytes are thus sent out the
DATA INTERFACE
port
as soon as an incoming RF data frame is disassembled. Average and typ-
ical latency will both be below 10 ms, but idle character gaps might be
introduced into the outgoing data flow.
If data buffering is
ON
, the radio operates in Seamless Mode. Data bytes
will be sent over the air as quickly as possible, but the receiver buffers
(stores) the data until enough bytes have arrived to cover worst-case
gaps in transmission. This mode of operation is required for protocols
such as MODBUS™ that do not allow gaps in their data transmission.
Seamless Mode (
BUFF ON
) is intended only for applications where the
transmitter’s baud rate is greater than or equal to the receiver’s baud
rate. Enforcement of this rule is left to the user.
In some rare cases, the default timing parameters for Seamless Mode are
not optimal. In these cases, the user might need to specify an exact delay
time. To set a custom delay time, enter
BUFF xxx
(
xxx
is a value between
1 and 255). Entering
BUFF xxx
resets the default delay time.