MDS 05-2708A01, Rev. B
MDS TransNET 900 I&O Guide
31
NOTE:
The DLINK rate must match the rate of any connected device to the diagnostic
port. This may be either another MDS radio’s diagnostic port, InSite computer,
or another data link device that eventually connects to the InSite computer.
DKEY
Disables the transmitter when it is keyed. See also
KEY
command.
DTYPE [NODE/ROOT]
The
DTYPE
command specifies the radio’s operational characteristics for
network-wide diagnostics. MDS TransNET 900 uses the following types:
•
NODE
–The most common setting, and the default. This is the basic
system radio device-type. Typically, the radio network is comprised of
nodes and one root. Intrusive diagnostics can originate from any node.
However, non-intrusive diagnostics can only be conducted from the
root node.
•
ROOT
–Always one, and only one, per network (including units
associated through Extension units.) The root is the focal point of
network-wide diagnostics information.
Intrusive diagnostics can
originate from any radio, including the root. However, the root is the
only radio through which non-intrusive diagnostics can be conducted.
FEC [ON, OFF]
This command is used to view the FEC setting, or turn it on or off. The default
setting is
FEC ON
. (It needs to be turned off when throughputs exceed
57,600 bps.) FEC is set at the master and is automatically passed on to all of
the remotes in a network.
Setting FEC to
ON
improves sensitivity at the cost of reduced throughput.
Typical SCADA/telemetry applications use low data rates and, as such, the
FEC setting is normally transparent to them.
HOPTIME [7, 28]
The
HOPTIME
command is used to set or display the hop-time setting. The
command is a digit corresponding to the hop-time setting in milliseconds. The
default
HOPTIME
setting is
7
. A setting of
28
must be used when throughputs
exceed 57,600 bps.
Changes to the
HOPTIME
setting may only be made at the master radio. (This
is because the Master radio establishes the hop-time setting for the entire
network.) At remote radios, the hop-time setting may be read when the radio
is in synchronization with the master, but it may not be changed.
INIT
The
INIT
command is used to reset the radio’s operating parameters to the
. This may be helpful when
trying to resolve configuration problems that resulted from the entry of one
or more improper command settings. If you are unsure of which command
setting caused the problem, this command allows you to get back to a known
working state.
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