
Wired M-Bus • Water Meters flowIQ® 2101/3100 TECHNICAL DESCRIPTION
Kamstrup A/S · Technical Description · 55121944_A1_GB_08.2016
9
5.3.3
Enhanced secondary addressing
A valid secondary M-Bus address has a value between (M-Bus ID No. 00000000-99999999) / (M-Bus fabrication No.
00000000-99999999) and is, in the flowIQ® 2101/3100, identical to the unique serial number.
The M-Bus water meter secondary address can therefore be extended in order to comprise the 8 digit BCD
‘fabrication number’ (4 bytes) – identical with the serial number of the meter. This number is unique for each
flowIQ® 2101/3100 and cannot be changed after the meter has been produced.
In connection with enhanced secondary addressing, the M-Bus water meter is selected by adding ‘fabrication
number’ as an ordinary data record with DIF = 0Ch (for 4 bytes, 8 digit BCD) and VIF = 78h (for fabrication number)
in the selection telegram after the secondary address.
When a M-Bus water meter is selected via enhanced secondary address, it will reply to primary address 253, as it is
with the ordinary secondary addressing. The M-Bus water meter is deselected either by
•
sending a new selection via primary address 253 with an enhanced or ordinary secondary address – different
from the one from the M-Bus water meter (by means of which another M-Bus meter may be selected, if
necessary)
or
•
sending a normalization (SND_NKE) to primary address 253.
Selection of M-Bus water meter via enhanced secondary address (and deselecting other M-Bus water meter):
Start character 68h
L-field
11h
L-field
11h
Start character 68h
C-field
53h or 73h
A-field
FDh
CI-field
52h
ID No. LSB
37 or FF BCD
E.g. M-Bus ID number = 4118737
ID No.
87 or FF BCD
ID No.
11 or FF BCD
ID No. MSB
04 or FF BCD
Man. ID LSB
2Dh or FFh
KAM encoded to 2D2Ch
Man. ID MSB
2Ch or FFh
Version ID
flowIQ2101
1Fh
Version ID
flowIQ 3100
1Dh
Device ID
16 (cold water), 06 (warm water)
Record
0Ch DIF:
4 bytes, 8 digit BCD
Fabrication. no. 78h VIF:
Fabrication no. (serial no.),
e.g.: 2500176
Fabr. no. LSB
76 or FF BCD
Fabr. no.
01 or FF BCD
Fabr. no.
50 or FF BCD
Fabr. no. MSB 02 or FF BCD
Checksum
Xxh
Stop character 16h