Rockwell Automation 1734-AENTR EtherNet/IP Network Configuration User Manual - Manual (Page 59)

Rockwell Automation Publication ENET-UM001L-EN-P - March 2014 59
Control I/O Chapter 5
4. From the Requested Packet Interval (RPI) menu, enter the rate at which
you want data to be updated over a connection.
Only set the RPI to the rate the application requires.
5. Click OK.
Unlike EtherNet/IP communication modules, in Logix5000 controllers, I/O
values update at an interval set via the project’s I/O configuration folder. The
values update asynchronously to the execution of logic. At the specified interval,
the controller updates a value independently from the execution of logic.
Access Distributed I/O I/O information is presented as a structure of multiple fields, which depends 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 through the programming software.
Each tag name follows this format:
Location:SlotNumber:Type.MemberName.SubMemberName.Bit
IMPORTANT The RPI determines the number of packets per second that the
module produces on a connection. Each module can produce only
a limited number of packets per second. Exceeding this limit
prevents the module from opening more connections.
This address variable Is
Location Identifies network location
LOCAL = local DIN rail or chassis
ADAPTER_NAME = identifies remote adapter or bridge
SlotNumber Slot number of I/O module in its chassis
Type Type of data
I = input
O = output
C = configuration
S = status
MemberName Specific data from the I/O module, which depends 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 the 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, which depends on the size of the I/O module (0...31 for a 32-point module)