Download 78M6613 Split-Phase Firmware Description Document

UG_6613_090
78M6613 Split-Phase Firmware Description Document
1 Introduction
This document describes a firmware build specifically designed for the 78M6613 with a split-phase
measurement interface (Split-Phase M-API Library) and UART host interface (Application Layer). This
firmware build is used as the base for all development and testing of the Split-Phase M-API Library.
The firmware provides simple methods for calibration, alarm monitoring, and access to the following
measurement data over a low baud rate serial UART interface.
•
Voltage rms (Line1, Line2)
•
•
•
•
Current (Line1, Line2)
Active Power (Line1, Line2, aggregate)
Apparent Power (Line1, Line2, aggregate)
Reactive Power (Line1, Line2, aggregate)
•
•
•
Power Factor (Line1, Line2)
Energy (Line 1, Line 2)
Line Frequency
1.1 Terminology
The following terminology is used throughout this document:
•
CLI – Command Line Interface (Application with ASCII based UART protocol).
•
•
SLIP – Serial Line Interface Protocol (Application with binary UART protocol).
CREEP – Threshold value where measurement outputs are squelched to zero.
•
IMAX – External RMS current corresponding to 250 mVpk at the current input of the 78M6613. It
should be set IMAX= (Vpk/√2)/RSENSE.
•
•
•
•
VARs – Reactive Power (Q).
VAs – Apparent Power (S).
Watts – Active Power (P).
VMAX – External RMS voltage corresponding to 250 mVpk at the voltage input of the 78M6613. It
must be set high enough to account for overvoltages.
Rev. 2
5