RMG TME400-VMF User Manual

APPENDIX
MANUAL TME400-VCF · EN08 · July, 01
st
2021
106
B3 Calculation of the storage size
The total available storage for archives is 506880 bytes.
Archive type
Bytes /
entry
Amount
entries
Sum in
bytes
Parameter archive (custody transfer)
34
300
10200
Parameter archive (non-custody transfer)
34
300
10200
Event archive
12
200
2400
Periodic archive
40
9000
360000
Daily archive
40
100
4000
Monthly archive
40
25
1000
Sum
387800
B4 Archive header
Each archive type contains an administration header that gives information about
how to access the archive.
The header is arranged as follows:
Content
Data type
Length in Bytes
Position number of the next archive
(largest value = 9999, then again = 0 )
UINT16
2
Index oldest entry
UINT16
2
Index newest entry
UINT16
2
CRC16 (Modbus)
UINT16
2
Total length: 8
There are four headers for each archive type, which are organized in memory as
ring buffers. This is to ensure that the information is stored safely in case of cell
defects in the EEprom. Each time a new archive entry is written, the corresponding
archive header is updated and stored as the next entry in the ring buffer:

RMG TME400-VMF Specifications

General

Brand	RMG
Model	TME400-VMF
Category	Measuring Instruments
Language	English