Campbell NL200, Instruction Manual

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NL200/201 Network Link Interface
12
x
Connect to the NL200/201 using a terminal emulator.
DevConfig’s
“unknown” device type or HyperTerminal are examples of simple terminal
emulators. The default settings for this interface are 115200 baud, 8 stop
bits, no parity, 1 stop bit, no flow control.
x
Power cycle the NL200/201 and repeatedly press Enter at the terminal.
x
Type help to see a list of the functionality available when connected to the
NL200/201 through Telnet.
x
Type edit and press Enter to edit the settings of the NL200/201.
x
As each NL200/201 setting is shown, press Enter to accept the current
value shown in parenthesis. Type a new value and press Enter to change
the value.
x
After progressing through all of the NL200/201 settings, type save to
accept the changes or cancel to discard the changes.
x
Disconnect your computer and power cycle the NL200/201.
7. Operation
This section describes how to configure your NL200/201 for different
operational modes. See Section
4 ,
Overview
(p. 5)
, for help in determining
which mode to use.
7.1 PakBus® Router
When the RS-232 or CS I/O port is configured as a PakBus® router, the
NL200/201 can route packets to other devices in the network that it has in its
routing table. These are devices that the NL200/201 has learned about through
beaconing or allowed-neighbor lists.
Beacon Interval – Devices in a PakBus® network may broadcast a hello-
message to other devices in order to determine “neighbor” devices. Neighbor
devices are devices that can be communicated with directly by the current
device without being routed through an intermediate device. A beacon in a
PakBus network helps to ensure that all devices in the network are aware of
which other devices are viable in the network. The beacon interval determines
how often a beacon will be sent out. Set the beacon interval to 0 to disable
beacons.
Verify Interval – This interval, in seconds, determines the rate at which the
NL200/201 will attempt to start a hello transaction with a neighbor if no other
communication has taken place within the interval. If Verify Interval is set to
0, the verify interval becomes 2.5 times the Beacon Interval. If both the
Beacon Interval and Verify Interval are set to 0, the verify interval becomes
300 seconds.
PakBus Neighbors Allowed – You can set a list of “acceptable neighbors”
which the NL200/201 expects to hear from within set intervals (the Verify
Interval ). If the NL200/201 does not hear from neighbors in this list within
the Verify Interval, it will attempt to contact them on its own. It will ignore all
devices it hears that are not on the PakBus Neighbors Allowed list except if the