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What is the difference between ION and Modbus communication modules that is used in Power logic meters PM8000 .

ION is the native protocol and architecture of your meter.
The basic building blocks of ION architecture are the ION modules, each of which is specialized to perform a specific task and contains data and instructions on how to manage that data.
ION modules are combined (linked) together to create the meter’s functions and features. ION modules that are linked together to perform a specialized task are called a framework, such as the Power Quality framework.
These different functional frameworks are then grouped together to define the entire meter, and are collectively referred to as the device template.
Your meter ships with a default device template which provides extensive capabilities. You can also configure your meter’s template to modify your meter’s existing functions or to create new functions.
See the ION Reference, available from for further information about ION architecture and a detailed description of the different ION modules.
See the ION Device Template Reference, available from, for details on the modules and their configuration in your meter’s default template.

Modbus is a master/slave communications protocol where the master initiates transactions and the slave(s) responds with the requested information or action.
Your device can function as a Modbus slave or Modbus master, depending on how it is configured. Your device comes with Modbus slave functionality configured and ready to use.
You can add custom Modbus information to the default Modbus slave data provided by your device.
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