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Chapter 10
Operate the Module
Managing Nonvolatile
Memory Configuration
252
GET Services
GET service commands, which use a (Common Industrial Protocol transport)
class 3 connection, are allowed from any device.
A maximum of three, class 3 connections, other than one from its host
controller, can be connected at any one time. This limit is the number of
devices that can simultaneously access data from the module, and its host
controller.
The Dynamix 1444 Series main module maintains a copy of its valid, executing
configuration in its nonvolatile memory. At power-up, if a valid configuration
is held in this memory, it is loaded and executed. This setting makes sure that
on power cycle that the module immediately begins functioning as required,
even if communication to its host controller is not available.
The following sections describe the processes to save the configuration to the
nonvolatile memory of the module, and to delete the configuration from the
memory.
Saving a Configuration to Nonvolatile Memory
The communication of a configuration to the module involves several steps.
• Communicate the data
The remote device sends the necessary configuration data by using the
SET Service of the modules configuration manager object.
During the transmission if an error is detected the module aborts the
process.
• Evaluate Attributes
Upon receipt of configuration data, the module evaluates each attribute
concerning its allowed range. If any attribute is not within its allowed
range, the module transmits a failure message.
• Apply the configuration
Once the configuration is communicated successfully, the host device
sends an Apply message to command the module to implement the
changes.
When an apply service is received, the module further evaluates the data
to detect dependency errors – violations of limitations to parameters
due to their dependency on other parameter settings.
Rockwell Automation Publication 1444-UM001D-EN-P - June 2018
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