Allen-Bradley 1756-CNB/E, User Manual

Page: 126 / 186

Publication 1756-UM523F-EN-P - December 2006
126 Maintain and Troubleshoot the System
Send a Message to the CNB Module
To use a Message (MSG) instruction to learn the CPU usage of a
CNB module, configure the MSG instruction.
CNB Module Configuration
Store or Load a Project
Using Nonvolatile Memory
Nonvolatile memory lets you keep a copy of your project on the
controller.
Nonvolatile Memory Definitions
On this tab For this Type or select
Configuration Message Type CIP Generic
Service Type Custom
Service Code 4f
Class a1
Instance 8
Attribute 0
Source Element Tag that uses a user-defined data type:
Source Length 6
Destination INT tag in which to store the CPU usage of the CNB module
(0 - 99%.)
Communication Path 1,
slot_number
where:
slot_number
is the slot number of the CNB module.
Members of the Data Type Tag Value
Name Data Type
offset DINT 0
size_returned INT 2
Term Description
Nonvolatile memory Memory of the controller that retains its contents while the
controller is without power or a battery.
Store To copy a project to the nonvolatile memory of the controller.
This overwrites any project that is currently in the nonvolatile
memory.
Load To copy a project from nonvolatile memory to the user memory
(RAM) of the controller. This overwrites any project that is
currently in the controller.