Landis+Gyr ZMQ202, User Manual

Page: 25 / 88

H 71 0200 0215 f en - ZMQ202 / ZFQ202 - User Manual Gyr
Description of Unit 25/88
2.7 Registers
The following registers are available for the analysis of the individual
measured values:
• 24 rated energy registers
• 38 total energy registers (no tariffs)
• other registers for values of voltage and current, network frequency,
phase angles etc.
Measured
values
Tariff switching
Se
le
ct
io
n of data for
di
sp
lay
and
com
m
un
ic
ati
on
Communication
Display
24 rated energy registers
38 total energy registers
Local Communication
Test output
2.8 Memory
A non-volatile memory (flash memory) contains the configuration and
parameterisation data of the meter. It also contains the load profile, the
energy profile and the event log data.
All data stored in the flash memory is prevented from loss caused by
voltage failures. No battery is required to do so.
2.8.1 Load Profile
The current statuses of various registers are saved to the load profile at
regular intervals.
Each load profile entry consists of the measured value itself (energy
registers = 8 bytes, diagnostic values = 4 bytes), a time stamp of 8 bytes
and a status code of 4 bytes.
The ZxQ meters feature a load profile memory of 1.8 MB. The memory
depth of the load profile is calculated with the formula below.
[ ]
[ ]
[ ]
min 60 h 24 byte entry per memory used
min period capture byte 1'810'000
days depth memory
× ×
×
=
A minimum of 100 days is guaranteed with 36 captured registers and a
capture period of 15 minutes.
The load profile is organised as a circular buffer, i.e. the oldest entry will be
overwritten by the most recent entry.
Load profile memory
size