3.8.1.3 Unit Cold Start; 3.8.1.4 Erase Memory; Security Mechanisms For Data Storage; Block Diagram Of Internal Memory - Baer DLX User Manual

3.8.1.3 Unit cold start

The DLX unit performs a cold start (message in the display: "System cold
start" under the same conditions as above, if the internal RAM memory
could not be buffered by the GoldCap (minimum of 7 days without power
supply voltage). In this case all device parameters and the device internal
system time need to be reconfigured. All data in the registration period
buffer is retained, and the system time is set to 59 minutes and 10 seconds
after the timestamp of the last stored entry in the main registration period
buffer. An event will be stored in the spontaneous event buffer.

3.8.1.4 Erase memory

All internal memory (spontaneous events, resets and registration period
data) can be erased using the menu item „SET PARAMETERS – Erase
memory". The device parameters are retained. An event is stored in the
spontaneous event buffer.
3.8.2

Security mechanisms for data storage

All data is secured in a number of ways: when data is stored, each byte
written is checked by an additional read cycle; for each block of data a
checksum is stored which is checked for correctness when the block is
read. Data is only used and forwarded when the checksums match.
3.8.3

Block diagram of internal memory

Figure 9, Block diagram of internal memory

The internal registration period memory can be divided into two areas for
registration periods Tm1 and Tm2 (if active), using DLXPARA. Each area
can contain counter readings, energy increments or demand values with 4,
6 or 8 digits.
Data stored in internal memory can additionally be stored on a PC-Card
(backup memory, see page 90).
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