FANUC Robotics America GFK-1535A - Manual (Page 59)

GFK-1535A Chapter 4 Configuring a Genius NIU and I/O Station 4-11
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Autoconfiguration Assigns Reference Addresses
The NIU stores data internally as discrete input bits, discrete output bits, analog
input words, and analog output words.
The NIU Data Memories
I discrete input bits
Q discrete output bits
AI analog input words
AQ analog output words
During autoconfiguration, the NIU automatically looks at the modules installed in
the I/O Station and assigns them to addresses in this internal I/O map. Reference
addresses are assigned in ascending order. For modules that have multiple data
types (for example, mixed I/O modules), each data type is assigned reference
addresses individually.
Modules that have software-configurable features use their default settings when
autoconfigured. These features are described in the VersaMax Modules, Power
Supplies, and Carriers Manual (GFK-1504).
Adding I/O modules to an Autoconfigured I/O Station
If additional I/O modules are added to an existing I/O Station, they do not become
part of the autoconfiguration until the NIU is power-cycled.
Clearing an Autoconfiguration
To clear an existing autoconfiguration, power down the NIU, disconnect the NIU
from the first I/O module, disconnect the expansion rack cable if present, and power
up the NIU. The configuration in the NIU is then cleared. (An existing software
configuration is cleared from the programmer, as described previously in this
chapter.)
Hot Inserting I/O Modules
It is possible to hot insert I/O modules in an I/O Station. If the module being
replaced already exists in the configuration, no other action is necessary to make the
module operable.