Rockwell Automation 57C650 AutoMax Programming Executive Version 3.8 - Manual (Page 117)

7Ć5 Configuring Variables
Figure 7.1 Ć Configuring Drop Areas 1Ć55 in Network Interface Modules
You can assign two names (and two descriptions) to each register/bit
in the Drop Areas 1Ć55 view and the Broadcast Data view: a
networkĆwide" name and a local" name.
The networkĆwide name for a register/bit is effectively a label that
identifies or reserves" the register/bit location across the entire
network and can be assigned for all the registers/bits from any
Network module on the network. Typically, networkĆwide names for
all registers/bits in the network are assigned first to provide a
template for configuring the individual drops.
When a networkĆwide name is assigned to a register/bit, it is placed
in a database ($NET.DBF, one per system). The networkĆwide name
will be displayed in the networkĆwide name" field for that register/bit
location on every Network module on the network. This keeps the
register/bit location from appearing unused in other Network
modules and from being inadvertently assigned another variable
name, e.g., speed_feedback%" is assigned to register seven in drop
area 15 in one rack and (by mistake) to register eight in drop area 15
in another rack.
Although assigning it a networkĆwide name defines the register/bit
across the network, it does not actually add the networkĆwide name
to the configuration database of any rack on the network.
Registers/bits that are not in the configuration database of a specific
rack, i.e., not configured, cannot be accessed by application tasks in
that specific rack.