Assigning Station Addresses - Texas Instruments 990 User Manual

Planning the Network
All addresses should
be
specified and documented before either
system generation or network generation begins. Planning the
network in this way facilitates both system and network
generation and may prevent aborting ei ther process due to
nonavailability of pertinent data.
2.2.2.1 Logi cal Uni t Nurn bers (LUNOs).
The LUNOs requi red are as follows:
*
*
Those associated with each FCCC channel to be used by
the communications package at the OXIO primary station
The LUNO assigned to the local-line module (LLM) at each
TX5 secondary station
All the required OXIO LUNOs are assigned automatically during
OXIO network generation. TX5
LUNO~s
are assigned by the user
during TX5 system generation. For DXIO network generation,
communication device CMOI (channel zero) is assigned LUNO >CO,
device CM02 (channell) is assigned LUNO >Cl, and so on in
sequence. For the TX5 system generation, the LLM is assigned
LL"NO >20. The FCCC channel number must
be
entered during network
generation to properly associ ate FCCC channel s and secondary
stations.
2.2.2.2 Assigning Station Addresses.
Each secondary station in the network must be assigned a station
address, which is determined by the address switch setting on the
LLM. The address is entered as a hexadecimal number and has a
range of >00 through >3F (0 through 63). After each address is
set physically, it should be recorded so that it can be entered
correctly during network generation. A switch address must be
selected for each secondary in the network. It must be unique
within a single multipoint line but not necessarily unique within
the whol e networ k. For exam pI
e,
if all four channel s of an FCCC
board are used, it is permissible for the same station address to
be used for four different secondary stations if they are all on
di ff erent Ii nes •
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