Schweitzer Engineering Laboratories SEL-3031, Instruction Manual

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Date Code 20181001 SEL-3031 Instruction Manual
Settings and Commands
Settings
4.15
correctly set. The green
SEC
LED indicates data being set through the radio link is
secured. Once the KEY setting is configured the setting can never be read back,
viewed, or saved with QuickSet.
To encrypt a radio link, both radios must contain an SEL-3044 and the KEY settings
must be set to the same value. See
Appendix B: Firmware Upgrade Instructions for
more information on the SEL-3044 Encryption Card. The DEVADDR and RADIOLST
settings are only available if the product contains an SEL-3044 Encryption Card and
the network architecture is point-to-multipoint (NETARCH = P2MP). The DEVADDR
Radio Address must be a unique address from 0 to 65534. Every radio on the same
network must be set to a different address. The RADIOLST is the address list of
allowed connected radios. Each radio will only accept communications from radios
that have the device address in the radio list. All remote radios shall have the address of
the Master radio address DEVADDR. The master radio needs a list of all the remote
addresses it is allowed to communicate with. You can only have one master in a P2MP
network and as many as 20 remotes with the Encryption Card. Adding a second master
will stop all communications.
The SUTIMEO (session use time-out) setting is only available when the SEL-3044
Encryption Card is present, NETARCH = P2MP, and MODE = MASTER. The
SUTIMEO setting is used to set the maximum time the master must wait before talking
with each remote in the RADIOLST setting. This setting must be set to the maximum
time it will take for a SCADA master to poll all of the remote devices. Once this time is
exceeded the master radio will attempt to reconnect to the remote while discarding all
incoming SCADA data. This out-of-band messaging will take around 100 ms per lost
device but will repeat every time the SUTIMEO expires. This timer resets each time a
master receives a successful packet from the remote. If you no longer plan to
communicate with a remote you should remove the device from the DEVADDR. The
SUTIMEO will also set the maximum time before the master radio will recognize a
new remote device added to the network. If you add a radio to an existing network, it
will take as long as the SUTIMEO time before the master recognizes and authenticates
the new remote.
NOTE:
Do not include any addresses of radios that are not
actively being used in the network. This will slow down
the network with out-of-band messaging.
Port Settings
The SEL-3031 settings allow you to configure the parameters for each of the three
communications ports. The SEL-3031 comes standard with three EIA-232 ports. In
P2P mode all three serial ports are active. In P2MP mode only Port 1 is active, Port 2
and 3 are disabled. Port 1 can be ordered as an EIA-232, EIA-485, or serial fiber-optic
port.
Table 4.7 shows the port settings ranges and default settings for Port 1, Port 2, and
Port 3.
Preliminary Copy—Subject to Change