30
= Key1
= Key 2
= Key 3
= Max. value or consumption = Min. value or supply
Memory
The memory of the UMG 505 is deviced into three
ranges. The
event memory
, the maximum and
minimum memory and the
ring buffer
. The event
and the ring buffer can be read out with the program
PSW505
and PC only. The data which are read out
by PC are available in ASCII format.
In the minimum and maximum memory, the
minimum and maximum values are deposited with
date and time.
All
monthly EMAX peak values
are saved for all
tariffs each month. The obsolete monthly Emax
peak values are overwritten at the beginning of a
new year.
Event memory
In the event memory, the following events can be
saved with date and time:
- Deletion of event memory,
- Change of the digital inputs,
- Change of the digital Emax outputs,
- Breakdown and return of the supply voltage,
- Breakdown and return of the measurement
voltage,
- Threshold violations.
The event memory can be read out with PC and the
programming and reading out software
PSW505
only.
The breakdown of the measurement voltage will be
recognized, when:
- the measurement voltage is smaller than
50% of the set primary of the voltage
transformer,
- and the breakdown remains longer than
500ms without interruption.
In the device, a part of the memory is available,
which are shared by the
ring buffer
and the
event
memory
. Here, the size of the event buffer can be
set in menu „
Prot
“ by programming the number of
saved events. If the number is set to "0", the whole
memory is available for the ring buffer.
If the number of events, that are saved, are
changed, the event memory and ring buffer are
deleted.