Specific implementation of DLMS
Physical layer
DLMS is available on the following communications ports, depending on your meter and options.
| Meter | Optical | RS-232/RS-485 | Modem | Ethernet |
|---|---|---|---|---|
| ION9000 | x | x | ||
| ION8650 | x | x | x | x |
| ION7400 | x | x | x | |
| ION8800 | x | x | x | x |
Data link layer
The following operation selections for HDLC (ISO/IEC 13239) are used in this implementation of DLMS:
-
unbalanced connection-mode data link operation
-
two-way alternate data transfer
-
the selected HDLC class of procedure is UNC, extended with UI frames
-
non-basic frame format transparency (HDLC Frame format type 3)
| DLMS/COSEM specification | Supported implementation |
|---|---|
|
Maximum Info Field Transmit |
128 |
|
Maximum Info Field Receive |
128 |
|
Maximum Window Size Transmit |
1 |
|
Maximum Window Size Receive |
1 |
|
Transparent transfer of long MSDUs |
Not supported |
|
Inactivity timeout |
120 seconds |
|
Inter-frame time out |
Determined by the value of the meter’s RxTimeout setting (configurable) |
|
Device Addressing Length |
4 bytes |
|
Physical Device Address |
The value of the meter’s Unit ID on the serial port being used for DLMS communications (configurable) |
|
Logical Device(s) |
Management Logical Device only at specified address 0x0001 |
Application layer
| DLMS/COSEM specification | Supported implementation |
|---|---|
|
Supported application context |
LN (logical name) referencing |
|
Available services |
attribute0-supported-with-GET |
|
block-transfer-with-get |
|
|
get |
|
|
set (supported for time synchronization only) |
|
|
selective-access |
COSEM layer
Standard COSEM objects
| Supported COSEM Objects |
|---|
|
Association LN - 0-0:40.0.0*255 |
|
SAP Assignment - 0-0:41.0.0*255 |
|
Logical Device Name - 0-0:42.0.0*255 |
|
Clock - 0-0:1.0.0*255 |
Default COSEM objects
ION9000, ION8650, ION7400 and ION8800 meters have default COSEM objects configured to provide load profile and billing information.
You can also configure your meter to provide any data recorded by your meter’s data recorders; see “Changing the data exported to DLMS client software”.
| Supported COSEM Objects | Capture Objects | COSEM/OBIS representation of capture objects |
|---|---|---|
|
Profile Generic 1-0:99.1.0*255 (Load Profile) |
Record Timestamp |
Clock attribute 2 - 0-0:1.0.0*255 |
|
Status (see below) |
Data attribute 2 - 0-0:97.97.0*255 |
|
|
kWh del int |
Register attribute 2 - 1-1:1.29.0*255 |
|
|
kVARh del int |
Register attribute 2 - 1-1:3.29.0*255 |
|
|
kWh rec int |
Register attribute 2 - 1-1:2.29.0*255 |
|
|
kVARh rec int |
Register attribute 2 - 1-1:4.29.0*255 |
|
|
Profile Generic 1-0:98.1.0*255 (Billing Data) |
Record Timestamp |
Clock attribute 2 - 0-0:1.0.0*255 |
|
Status (see below) |
Data attribute 2 - 0-0:97.97.0*255 |
|
|
kWh del |
Register attribute 2 - 1-1:1.8.0*255 |
|
|
kWh rec |
Register attribute 2 - 1-1:2.8.0*255 |
|
|
kWh del-rec |
Register attribute 2 - 1-1:16.8.0*255 |
|
|
kVARh del |
Register attribute 2 - 1-1:3.8.0*255 |
|
|
kVARh rec |
Register attribute 2 - 1-1:4.8.0*255 |
|
|
kVARh del-rec |
Register attribute 2 - 1-1:128.8.0*255 |
|
|
kVAh del+rec |
Register attribute 2 - 1-1:9.8.0*255 |
|
|
kW sd del-rec |
Register attribute 2 - 1-1:16.4.0*255 |
|
|
kVAR sd del-rec |
Register attribute 2 - 1-1:128.4.0*255 |
|
|
kVA sd del+rec |
Register attribute 2 - 1-1:9.4.0*255 |
|
|
PF sign mean |
Register attribute 2 - 1-1:13.0.0*255 |
Status capture object bitmap
When all bits are set, the status is considered invalid.
| Status (unsigned 16 bit) | Value |
|---|---|
|
bit 15 |
Reserved |
|
bit 14 |
Reserved |
|
bit 13 |
Reserved |
|
bit 12 |
Reserved |
|
bit 11 |
Reserved |
|
bit 10 |
Reserved |
|
bit 9 |
DST Ended |
|
bit 8 |
DST Started |
|
bit 7 |
Power Down |
|
bit 6 |
Power Up |
|
bit 5 |
Time Changed |
|
bit 4 |
Reserved |
|
bit 3 |
Master Reset |
|
bit 2 |
Reserved |
|
bit 1 |
Reserved |
|
bit 0 |
Reserved |