Rockwell-automation 57C620 AutoMax Programming Executive Version 3.8 Bedienungsanleitung PDF herunterladen (Seite 117)

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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

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.

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Rockwell-automation 57C620 AutoMax Programming Executive Version 3.8 Bedienungsanleitung Seite 117