MULTICAL® 302
64
Kamstrup A/S · Technical Description · 5512-1334_F1_GB_12.2016
12
Communication
MULTICAL
302 offers two different forms of communication, namely wired M-Bus or Wireless M-Bus.
12.1
Wired M-Bus
If the meter is supplied with built-in wired M-Bus, M-Bus protocol according to EN 13757-3:2013 is used. Connection
to the M-Bus master is established via the fixed 1.5 m 2-wire cable. Connection is independent of polarity and the M-
Bus interface is galvanically separated from the rest of the meter.
The communication speed with automatic baud rate detection is 300 or 2400 Baud. Both primary and secondary
addressing is supported. Current consumption is 1 unit load (1.5 mA).
Reading intervals down to one hour do not influence the specified battery lifetime, whereas reading intervals down to 5
minutes halves the battery lifetime.
We recommend a communication speed of 2400 Baud as the current consumption is higher at a communication speed
of 300 Baud.
The following data can be read via M-Bus:
M-Bus data header
Current data
Target data*
Meter data
M-Bus ID
Producer ID
Version
Device type
Access counter
Status
Configuration
Heat energy E1
Cooling energy E3
Energy m
3
*T1= E8
Energy m
3
*T2 = E9
Volume V1
Hour counter
Error hour counter
T1
T2
T1-T2
Current power
Max. power current month*
Current flow
Max. flow current month*
Info code
Date/time
Heat energy E1
Cooling energy E3
Energy m
3
*T1 = E8
Energy m
3
*T2 = E9
Volume V1
Max. power
Max. flow
Target date
Serial number
Customer number 1
Customer number 2
Config. number 1
Config. number 2
Meter type
SW-revision
* Monthly data is transmitted by default. Change to yearly data possible by means of an M-Bus command.
For further details we refer to Technical description on M-Bus for MULTICAL
®
302, see documentation 5512-1329.
