Rockwell Automation 1757-FFLDC4 FOUNDATION Fieldbus System User Manual - Manual (Page 101)

Rockwell Automation Publication 1757-UM012A-EN-P - July 2011 101
Chapter
6
Logix Block Operation in a
ControlLogix System
Introduction RSLogix 5000 programming software sees the linking device as a remote chassis
with a virtual backplane, with up to 16 available slots. When a Logix Block is
added it is seen by RSLogix 5000 programming software as an analog module.
Each configured Logix Block module takes one slot and is assigned a unique slot
number.
This chapter explains how the Logix Block works within the ControlLogix
system. The table shows the main topics discussed.
Ownership and
Connections Every Logix Block module in the ControlLogix system must be owned by a
ControlLogix controller to be useful. The Logix Block module’s position is
located remotely, relative to the owner-controller’s position. The owner-
controller initiates communication with the Logix Block module to begin
operation within the control system. Each Logix Block module must
continuously maintain communication with its owner-controller to operate
normally.
Logix Block modules are limited to a single owner. Additional listen-only
connections can be made to Logix Blocks.
Topic Page
Ownership and Connections 101
Use RSLogix 5000 and RSNetWorx Software 102
Direct Connections 102
Logix Block Module Operation 103
Logix Block Modules Connected through EtherNet/IP Network
(1757-FFLD linking device) 103
Scheduled Logix Block Modules Connected through ControlNet
Network (1757-FFLDC linking device) 104
Listen-only Mode 104