Intelligent electronic device and method thereof

An intelligent electronic device (IED) comprising:

• at least one sensor configured for sensing at least one electrical parameter of electrical power distributed from an electrical distribution system to a load;
• at least one analog-to-digital converter coupled to the at least one sensor and configured for converting an analog signal output from the at least one sensor to digital data;
• a DSP (Digital Signal Processor) coupled to the at least one analog-to-digital converter, and configured to perform digital signal processing on the signal from the at least one analog-to-digital converter;
• a CPU coupled to the DSP via a hardware path;
• wherein the DSP and the CPU are configured to communicate using a transmission protocol including a data header and a data payload based on the hardware path;
• wherein the data header includes a field of parameter group, the data payload includes fields of a parameter type, an update rate and a channel type;
• the parameter group represents a group of electrical parameters with the similar functions;
• the parameter type represents specific type of the parameter group;
• the update rate represents a period between times of current electrical parameters measured by IED and the next electrical parameters measured by IED;
• the channel type represents the specific channel where the electrical parameter is measured.