User's Manual

Title:
AJ102 Data Concentrator Unit User Manual
Ver.
1.4
Page:
10 of 23
Daily profile data
Last two days
Energy load profile
Last two days
Power quality load profile
Last two days
4.4.2 Storage Capacity
Below table defines the storage capacity for meter monthly billing data, daily profile data, load profile data
and meter event logs:
Data Type
Capacity
Monthly billing data
13 months
Daily profile data
32 days
Energy load profile
4 days
Power quality load profile
4 days
Event logs
200 events for each meter
The data will be first in first out (FIFO).
4.4.3 Data Upload to Central System
Central system can read the meters’ data stored in DCU through DLMS protocol via the DCU’s WAN
communication port.
The new read data will be compressed in files and sent to the central system by FTP. It is configurable for
the FTP data uploading schedule.
4.5 On Demand Request and Response Transferring
DCU works transparently to get the on request from the central system, and transfer the request to specified
meter, and transfer the response from the meter to the central system. DCU does not interpret the request
and response.
The request to meter includes but not limit to:
1) Read meter energy registers, instant parameters, other registers
2) Read tariff schedule
3) Read clock
4) Set meter parameters, tariff schedule
5) Set tariff schedule
6) Set clock
7) Connect or disconnect the meter
8) Read monthly billing data, daily profile data, load profile data.
4.6 DCU Firmware Upgrade
DCU’s firmware is upgradable from the central system through FTP protocol.
DCU’s firmware is also upgradable from the central system or optical port through DLMS protocol.
4.7 Meter Firmware Upgrade
Central system can request DCU to upgrade the meter’s firmware. DCU will firstly download the meter
firmware from central system via FTP protocol, then start to download the firmware to the meters. The
meter firmware upgrade procedure compliant to the DLMS firmware upgrade procedure.