Product manual

NL200 Network Link Interface
7.2.4 Connect
You are now ready to Connect to your datalogger using the LoggerNet Connect
Screen.
7.2.5 Serial Sensors
The NL200 configured as an RS-232 Serial Server as described above can be
used to communicate with a serial sensor. However, LoggerNet is not capable
of communicating with the serial sensor. You must have some other method of
communicating with the sensor.
7.3 PakBus Router
When the RS-232 or CS I/O port is configured as a PakBus router, the NL200
can route packets to other devices in the network that it has in its routing table.
These are devices that the NL200 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 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.
Neighbors Allowed List - You can set a list of “acceptable neighbors” which
the NL200 expects to hear from within set intervals (the Verify Interval). If
the NL200 doesn’t 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 Neighbors Allowed List except if the PakBus address is ≥4000.
Hellos from devices with PakBus address ≥4000 are automatically accepted as
neighbors.
7.3.1 Physical Set-up
Power the NL200 through the barrel connector jack located on the edge of the
device. Connect the NL200 to your local network using an Ethernet cable,
attaching one end to the NL200's Ethernet port and the other end to your
network. Connect the supplied SC12 serial cable from the NL200’s CS I/O
port to the datalogger’s CS I/O port or from the NL200’s RS-232 port to the
datalogger’s RS-232 port
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