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Chapter 2
Configurable Flowmeter Operation in the ControlLogix System
Ownership
16
5. The Logix owner-controller processes the data it received from the
module and returns the appropriate data.
Figure 1 - 1756-CFM Basic Operational Steps
Logix Controller
5
The module communication or multicasting behavior varies depending
IMPORTANT
upon whether it operates in the local chassis or in a remote chassis. The
following sections detail the differences in data transfers between these
setups.
Every 1756-CFM module in the ControlLogix system must be owned by a
®
Logix5550
controller. The owner-controller:
•
stores configuration data for every module that it owns.
•
can be local or remote in regard to the I/O module's position.
•
sends configuration data to the module to define the module's behavior
within the control system.
Each module continuously maintains communication with its owner during
normal operation. When connections are severed or compromised, the module
performs as configured, either setting all outputs to reset (ON or OFF) or
continuous operations.
Other controllers can also listen to the module (while another controller owns
the module) through a listen-only connection. For more information on listen-
only connections, see
Rockwell Automation Publication 1756-UM010C-EN-P - June 2021
1756-CFM
1
2
3
4
page
18.
Input
Device
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