Live list and uncommissioned devices – Rockwell Automation PLC-5 Fieldbus Solutions for Integrated Architecture User Manual User Manual
Page 73

Publication 1757-UM006A-EN-P - May 2002
Integrating Fieldbus into Rockwell Automation Logix System 2-29
Live List and Uncommissioned Devices
F
OUNDATION
Fieldbus defines a live list as a 32-byte bitstring (256 bits)
where each bit represents an address of the fieldbus network. A set bit
at a particular bit number means that a device is present at that
address. The LAS of the network owns the live list and maintains it as
part of its operation.
The FIM constantly monitors the live list for each fieldbus link or
device connected to it. When the LAS for the link recognizes a new
device at a default address, it adds it to its live list according to the
data link layer procedures. The FIM detects the change in the live list
and makes a connection to the new uncommissioned device. It
gathers the following information from the device to be passed to
Control Builder.
Control Builder uses the device information to create an item in its
Monitoring tree to represent the new uncommissioned device on the
given link. Users can now view and configure pertinent information
for the uncommissioned device through appropriate Link block and
device block configuration forms in Control Builder.
Table 2.I Gathered information from device passed to Control Builder
Name
Description
Data Type
Access
PdTag
Physical Device Tag
32-byte string
Read/Write
Address
Device Address
Unsigned8
Read/Write
DevID
Globally unique Device
Identifier
32-byte string
Read Only
Vendor
Vendor name string
32-byte string
Read Only
ModelName
Model Name string
32-byte string
Read Only
Rev
Application Revision
32-byte string
Read Only
ManufID
Manufacturer Identifier
Unsigned32
Read Only
DevType
Device Type code
Unsigned16
Read Only
DevRev
Device Revision
Unsigned8
Read Only
DdRev
DD Revision
Unsigned8
Read Only
TIP
The FIM must be configured and loaded through
Control Builder before you can view the module.
You can view the module’s links and devices
through the Monitoring tab of Control Builder.