MULTICAL® 803
164
Kamstrup A/S · Technical description · 5512-2360_A1_
GB
_02.2019
12
MULTICAL® 803 data protocol
The Internal data communication in MULTICAL® 803 is based on the Kamstrup Meter Protocol (KMP) that provides a
fast and flexible reading structure and also fulfils future requirements for data reliability.
The KMP protocol is used in all Kamstrup consumption meters launched from 2006 onwards. The protocol is used for
the optical read-out head and via plug pins for the module area. Thus, modules with e.g. M-Bus interface use the
KMP protocol internally and the M-Bus protocol externally.
Integrity and authenticity of data
All data parameters include type, measuring unit, scaling factor and CRC16 check sum.
Every produced meter includes a unique identification number (S/N).
12.1
Optical read-out head
The optical read-out head can be used for data communication via the optical interface. The optical read-out head is
placed on the front of the calculator just above the IR-diode as shown in the picture below. Note that the optical
read-out head includes a very strong magnet, which should be protected by means of an iron disc when not in use.
Various variants of the optical read-out head appear from the list of accessories (see paragraph 3.3).
The optical read-out head is manually fixed when there is a need for brief readings. If you want the optical read-out
head to be fixed permanently during the reading, the adhesive metal plate type 6699-042 is used.
Power savings in connection with the optical read-out head
In order to limit the power consumption of the circuit around the IR diode, the calculator includes a magnet sensor
that switches off the circuit when there is no magnet near it.
12.2
Data protocol
Utilities and other relevant companies who want to develop their own communication driver for the KMP protocol
can order a demonstration program in C# (.net based) as well as a detailed protocol description (in English language).