Maxim Integrated 71M6533-DB - Manual (Page 32)

71M6533- DB Demo Board User’s Manual
Page: 32 of 75 ` REV 3
Status
Word Bit
Name DESCRIPTION
20 POWER_BAD
Set after reset when the read of the power register data has a bad
longitudinal redundancy check or read failure in both copies. Two copies
are used because a power failure can occur while one of the copies is
being updated.
21 GNDNEUTRAL Indicates that a grounded neutral was detected.
22 TAMPER Tamper was detected †**
23 SOFTWARE A software defect was detected.
25 SAGA
Element A has a sag condition. This bit is set in real time by the CE and
detected by the ce_busy interrupt (ce_busy_isr() in ce.c) within 8 sample
intervals, about 2.6ms. A transition from normal operation to SAGA
causes the power registers to be saved, because the demo PCB is
powered from element A.
26 SAGB
Element B has a sag condition. This bit is set in real time by the CE and
detected by the ce_busy interrupt (ce_busy_isr() in ce.c) within 8 sample
intervals, about 2.6ms.
27
SAGC‡
Element C has a sag condition. See the description of the other sag bits.
28 F0_CE
A square wave at the line frequency, with a jitter of up to 8 sample
intervals, about 2.6ms.
31 ONE_SEC Changes each accumulation interval.
Table 1-7: MPU Status Word Bit Assignment
MPU ACCUMULATION OUTPUT VARIABLES
Accumulation values are accumulated from XFER cycle to XFER cycle (see Table 1-8). They are organized as
two 32-bit registers. The first register stores the decimal number displayed on the LCD. For example, if the LCD
shows “001.004”, the value in the first register is 1004. This register wraps around after the value 999999 is
reached. The second register holds fractions of the accumulated energy, with an LSB of
9.4045*10
-13
*VMAX*IMAX*In_8 Wh.
The MPU accumulation registers always hold positive values.
The CLI commands with two question marks, e.g. )39?? should be used to read the variables.
XRAM
Word
Address
Name Description
0x2C Whi Total Watt hours consumed (imported)
0x44 Whe Total Watt hours generated (exported)
0x34 VARhi Total VAR hours consumed
0x4C VARhe Total VAR hours generated (inverse consumed)
0x3C VAh Total VA hours
0x2E Whi_A Total Watt hours consumed through element 0
0x46 Whe_A Total Watt hours generated (inverse consumed) through element 0
0x36 VARhi_A Total VAR hours consumed through element 0
0x4E VARhe_A Total VAR hours generated (inverse consumed) through element 0
0x3E VAh_A Total VA hours in element 0
0x30 Whi_B Total Watt hours consumed through element 1
0x48 Whe_B Total Watt hours generated (inverse consumed) through element 1
0x38 VARhi_B Total VAR hours consumed through element 1
0x50 VARhe_B Total VAR hours generated (inverse consumed) through element 1