Allen-Bradley ControlNet Compact GuardLogix 1769, User Manual, Page: 65 / 100

Control I/O Chapter 4
Distributed I/O Communication Formats
Your selection of communication format when you add distributed I/O modules
is based on whether you want rack-optimized or direct connections to each
distributed I/O module and corresponds directly with the communication
format you chose for your remote adapter.
Remote Adapter Communication Format Distributed I/O Communication Format
Rack Optimization Rack Optimization
None An appropriate direct-connection format
Access Distributed I/O
I/O information is presented as a structure of multiple fields dependent on the
specific features of the I/O module. The name of the structure is based on the
location of the I/O module in the system. Each I/O tag is automatically created
when you configure the I/O module in RSLogix 5000 software. Each tag name
follows this format:
Location:SlotNumber:Type.MemberName.SubMemberName.Bit
Address Variable Definition
Location Identifies the network location by using one of these values:
• LOCAL—Local DIN rail or chassis
• ADAPTER_NAME—Remote adapter or bridge that you specify
SlotNumber Slot number of I/O module location in its chassis.
Type
Identifies one of these types of data:
• I—Input
• O—Output
• C—Configuration
• S—Status
MemberName Specific data from the I/O module depending on the type of data the
module can store. For example, Data and Fault are possible fields of data
for an I/O module. Data is the common name for values that are sent to or
received from I/O points.
SubMemberName Specific data related to a MemberName.
Bit (optional)
Specific point on the I/O module depending on the size of the I/O module
(0...31 for a 32-point module).
Rockwell Automation Publication CNET- UM001E-EN-P - June 2016 65