GE MDS TransNET OEM EL806, Руководство по эксплуатации

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42 TransNET OEM Integration Guide 05-3946A01, Rev. C
BAND [A, B, C]
Select Sub-Band (Normally used for 2.4 GHz model)
This command sets or displays the receiving and transmit operating band for
the radio.
A
= 2.4016–2.4270 GHz

B
= 2.4272–2.4526 GHz

C
= 2.4528–2.478.2 GHz
NOTE: The same
BAND
setting must be common across each radio in a given
network and it must be programmed at the time of installation.
BUFF [ON, OFF]
Data Buffer Mode
This command sets or displays the received data handling mode of the radio.
The command parameter is either
ON
or
OFF
. (The default is
OFF
.) The
setting of this parameter affects the timing of received data sent out the
DATA
connector. Data transmitted over the air is unaffected by the
BUFF
setting.
If data buffering is set to
OFF
, the radio will operate with the lowest possible
average latency. Data bytes are sent out the
DATA
port as soon as an incoming
RF data frame is processed. Average and typical latency will both be below
10 ms, but idle character gaps may be introduced into the outgoing data flow.
If data buffering is
ON
, the radio will operate in a seamless mode. That is, data
bytes will be sent over the air as quickly as possible, but the receiver will
buffer the data until the entire packet has been collected. The delay introduced
by data buffering is variable and depends on message size and the number of
retransmissions required, but the radio will not create any gaps in the output
data stream. 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
message size is 256 characters or less. Enforcement of this rule is left up to
the user. If more than 256 characters are transmitted data delivery will not be
seamless and data may be lost.
Changes to the
BUFF
setting may only be made at the Master radio, as the
Master radio broadcasts the buffer setting for the entire network. At Remote
radios, the buffer setting may be read when the radio is in synchronization
with the Master, but it cannot be changed.
CODE [NONE, 1…255]
Security Code
The
CODE
command is used to select or display the security/encryption
setting in the radio.
The default is
CODE NONE
. Setting
CODE
to a value other than
NONE
provides an extra level of security beyond that provided by the Network
Address (
ADDR
). The disadvantage is increased complexity in managing the
network.