TECHNICAL DESCRIPTION
MULTICAL
®
41
5512-313 GB/01.2010/Rev. C1
33
11
Data Communication
11.1
Optical reading
An optical, infrared transmitter/receiver is placed on the front of MULTICAL
®
41. The data format fulfils IEC 870 in
start mode and can then be converted into a producer specific format. A standardized optical reading head with a
permanent magnet is used for data reading and configuration. To be able to change such data, however, an
internal connection must be made before programming as the data in question is legal measuring data. If
necessary, use data cable 66-99-108 or Verification Equipment 66-99-385, in which the internal connection is
integrated. Kamstrup reading head, type 66-99-102 connects to Kamstrup’s hand-held terminal, MULTITERM, and
a standard IBM compatible PC with Windows 98 or newer versions.
For further information on functions in the hand-held terminal and programming software, please refer to
documentation for:
MULTITERM Pro
Functioning
When the connected reading unit, MULTITERM, or the PC sends a recognizable request string, MULTICAL
®
41
replies with a data string 1-2 sec. after having received the request string. MULTICAL
®
41’s optical data reading
uses the following communication setup:
300/1200 Baud, 1 Startbit, 7 Databits, Even parity, 2 Stopbits
NB: Except for optical reading, section 11.2, the other data strings contain neither measuring units nor decimal
points (raw data). Information on decimal points is available on the CCC tables in this technical description.
11.2
Optical data reading
Below data can be read via the optical eye placed on the front of MULTICAL
®
41 and via the data terminals.
Command (300 BAUD)
Return string (300 BAUD)
/?! [CR] [LF]
[ACK]000 [CR] [LF]
/KAM [0] MCC [CR] [LF]
[STX]0.0(11 digit K/N)
6.8(Blank)
6.26(Volume * m3)
6.31(Operating hours * h) ! [CR] [LF] [ETX]
[BCC]
Tabel 8
In general, the reading is built up according to EN61107/IEC1107, Mode A, but BCC is calculated arithmatically
as on M-Bus and not as module 2-binary sum according to ISO1155.