Introduction - KNX
Introduction - KNX
Introduction - KNX
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Contents<br />
00 – closed<br />
01 – opened<br />
02 – released (ready to<br />
open)<br />
00 – closed<br />
01 – opened<br />
02 – released (ready to<br />
open)<br />
03 – moving<br />
04 - ready<br />
The Dutch approach is to refer to the valve as remotely controlled device; the MUC<br />
approach is to refer to the valve as Digital Output.<br />
Note that in the German approach I personally would have selected “Digital Input”<br />
(VIFE=1BH) for valve status (MUC_080128_inkl_Anlagen.pdf SRR section 5.3.4).<br />
Meter fault / alarm handling<br />
(MUC_080128_inkl_Anlagen.pdf section 5.2.4)<br />
The extended error flag (German definition DIF=n4H, VIF=FDH, VIFE=17H) is not<br />
used in the Dutch version. The error flag in the Data Header is used in the Dutch<br />
version. This limits the number of errors in the Dutch definition to eight bits, five of<br />
which are predefined.<br />
Time Synchronisation<br />
The Dutch smart meter specifications include time synchronisation. Whether or not<br />
Daylight Savings Time is used is up to the grid company managing the meter.<br />
The MUC documents include Summer/Wintertime (DST) updates<br />
(MUC_080128_inkl_Anlagen.pdf SRR section 5.2.5).<br />
Indexes Log<br />
(MUC_080128_inkl_Anlagen.pdf SRR section 5.2.8).<br />
In the Dutch smart meter specifications, the M-Bus devices (meters) do not maintain<br />
logging. The MUC maintains all historic logs, meters transfer current measured data.<br />
The indexes log functions are therefore not used in the Dutch version.<br />
Gas Volume, transfer and calculation<br />
OMS chooses to Define a new gas metering device to enable transfer of corrected<br />
volumes (OMS-Spec_Vol2_Primary_v102.pdf section 4.3.1). In our opinion, the<br />
device is still a regular gas meter; however the data item is different. We choose to<br />
define a new DIF/VIF combination to signify corrected gas volumes. This would, in<br />
theory and in future systems, also allow the transfer of both corrected and uncorrected<br />
volumes by one single M-Bus device (MUC_080128_inkl_Anlagen.pdf SRR section<br />
5.3.2).<br />
Other Data Transfers<br />
The Dutch Smart meter specifications do not define large storage indexes for metered<br />
data, however the meter reading of the previous full hour is stored as storage index<br />
#1. The is never more than one measured value stored in the Dutch meters. In the<br />
MUC documents, measurement and reading logs are defined<br />
(MUC_080128_inkl_Anlagen.pdf SRR section 5.4).<br />
Review M-bus.doc 4 04/12/2008
Change language