M-bus value information block (VIB)

The M-bus manager implementation of the BA-Device will support up to 10 VIFE extension fields, for example, the combination of VIF.VIFE.VIFE.VIFE.VIFE.VIFE.VIFE.VIFE.VIFE.VIFE.VIFE to allow the mapping of all theoretical manufacturer specific data points as long as the used data types and encoding formats are in line with standard M-Bus definitions. Following is the structure of the VIF and VIFE.

Bit 7	6	5	4	3	2	1	0
Extension bit	Unit and multiplier (value)

Codes for value information field

The first block of the table contains integral values, the second typically averaged values, the third typically instantaneous values and the fourth block contains parameters (E: extension bit).

Coding	Description	Range coding	Range
`E000 0nnn`	`Energy`	`10` ^(nnn-3) `Wh`	`0.001 Wh to 10 000 Wh`
`E000 1nnn`	`Energy`	`10` ⁽ⁿⁿⁿ⁾ `J`	`0.001 kJ to 10000 kJ`
`E001 0nnn`	`Volume`^a	`10` ^(nnn-6) `m`³	`0.001 l to 10000 l`
`E001 1nnn`	`Mass`	`10` ^(nnn-3) `kg`	`0.001 kg to 10000 kg`
`E010 00nn`	`On time`	`nn = 00 seconds` `nn = 01 minutes` `nn = 10 hours` `nn = 11 days`	`Duration of meter power up`
`E010 01nn`	`Operating time`	`nn = 00 seconds` `nn = 01 minutes` `nn = 10 hours` `nn = 11 days`	`Duration of meter accumulation`
`E010 1nnn`	`Power`	`10` ^(nnn-3) `W`	`0.001 W to 10 000 W`
`E011 0nnn`	`Power`	`10` ⁽ⁿⁿⁿ⁾ `J/h`	`0.001 kJ/h to 10 000 kJ/h`
`E011 1nnn`	`Volume flow`	`10` ^(nnn-6) `m`³`/h`	`0.001 l/h to 10 000 l/h`
`E100 0nnn`	`Volume flow ext.`	`10` ^(nnn-7) `m`³`/min`	`0.0001 l/min to 1 000 l/min`
`E100 1nnn`	`Volume flow ext.`	`10` ^(nnn-9) `m`³`/s`	`0.001 ml/s to 10 000 ml/s`
`E101 0nnn`	`Mass flow`	`10` ^(nnn-3) `kg/h`	`0.001 kg/h to 10 000 kg/h`
`E101 10nn`	`Flow temperature`	`10` ^(nn-3) `°C`	`0.001 °C to 1 °C`
`E101 11nn`	`Return temperature`	`10` ^(nn-3) `°C`	`0.001 °C to 1 °C`
`E110 00nn`	`Temperature difference`	`10` ^(nn-3) `K`	`1 mK to 1 000 mK`
`E110 01nn`	`External temperature`	`10` ^(nn-3) `°C`	`0.001 °C to 1 °C`
`E110 10nn`	`Pressure`	`10` ^(nn-3) `bar`	`1 mbar to 1 000 mbar`
`E110 1100`	`Date`	`YYYY-MM-DD`^c	`Data field = 0010`^b`, type G`
`E110 1101`^b	`Date and time`	`YYYY-MM-DD hh-mm`^c	`Data field = 0100`^b`, type F`
`E110 1101`^b	`Time`	`Hh:mm:ss`^c	`Data field = 0011`^b`, type J`
`E110 1101`^b	`Date and time`	`YYYY-MM-DD hh:mm:ss`^c	`Data field = 0110`^b`, type I`
`E110 1101`^b	`Date and time or duration`	`YYYY-MM-DD hh:mm:ss,ppppp`^c`or ssssssssss,ppppp`^c	`Data field = 1101`^b`, type M`
`E110 1110`	`Units for H.C.A.`		`dimensonless`
`E110 1111`	`Reserved`	`nn coded like on time`
`E111 00nn`	`Averaging duration`	`nn coded like on time`
`E111 01nn`	`Actuality duration`
`E111 1000`	`Fabrication number`		`See CEN/TR 17167:2018, Annex A.8.2`
`E111 1001`	`(Enhanced)`
`E111 1010`	`Bus address`

^a For gas it is the temperature converted volume, unless a VIFE signals volume at metering-conditions or volume at base conditions.

^b Meaning depends on data field. Other data fields shall be handled as invalid.

^c YYYY = year, MM = month, DD = day, hh = hour, mm = minute, ss = second, pp = part of a second