Mapping of Engineering Units – OPC UA for BACnet – BACnet: OPC UA Information Model

11 Mapping of Engineering Units

Mapping the engineering units used OPC UA is not quite easy. Table 252 shows those units which are identical in both standards and thus can be easily mapped.

Rows marked in yellow, not having an OPC UA UnitId, are handled differently. For those, an EngineeringUnits shall be used having “http://opcfoundation.org/UA/BACnet_V2/” as NamespaceUri, the “BACnetEngineeringUnits enumeration value” as UnitId, the OPC UA DisplayName of the table as DisplayName and the OPC UA Description of the table as Description.

Table 252 – Mapping of BACnet EngineeringUnits to OPC UA UnitIds

BACnetEngineeringUnits enumeration value	OPC UA UnitId	OPC UA DisplayName	OPC UA Description
0	5067851	m²	square metre
1	4609099	ft²	square foot
2	13387	mA	milliampere
3	4279632	A	ampere
4	5195853	Ω	ohm
5	5655636	V	volt
6	4937300	kV	kilovolt
7	4339512	MV	megavolt
8	4469814	V·A	volt - ampere
9	4937281	kV·A	kilovolt - ampere
10	5068353	MV·A	megavolt - ampere
11			volt-amperes-reactive
12	19253	kvar	kilovolt ampere (reactive)
13			megavolt-amperes-reactive
14			degrees-phase
15			power-factor
16	4869973	J	joule
17	4934223	kJ	kilojoule
18	5720146	W·h	watt hour
19	4937544	kW·h	kilowatt hour
20	4862777	Btu	British thermal unit (mean)
21	5125938	thm (US)	therm (U.S.)
22	13399	ton (US) /h	ton (US) per hour
23			joules-per-kilogram-dry-air
24			btus-per-pound-dry-air
25			cycles-per-hour
26			cycles-per-minute
27	4740186	Hz	hertz
28			grams-of-water-per-kilogram-dry-air
29			percent-relative-humidity
30	5066068	mm	millimetre
31	5067858	m	metre
32	4804168	in	inch
33	4607828	ft	foot
34			watts-per-square-foot
35			watts-per-square-meter
36	5002573	lm	lumen
37	5002584	lx	lux
38	5255735	ftc	footcandle
39	4933453	kg	kilogram
40			pounds-mass
41			tons
42	4933459	kg/s	kilogram per second
43	4600625	kg/min	kilogram per minute
44	4536627	kg/h	kilogram per hour
45			pounds-mass-per-minute
46			pounds-mass-per-hour
47	5723220	W	watt
48	4937556	kW	kilowatt
49	5062999	MW	megawatt
50	4863031	Btuth/h	British thermal unit (thermochemical) per hour
51			horsepower
52			tons-refrigeration
53	5259596	Pa	pascal
54	4935745	kPa	kilopascal
55	4342098	bar	bar [unit of pressure]
56	20563	lbf/in²	pound-force per square inch
57			centimeters-of-water
58	4601656	inH2O	inch of water
59			millimeters-of-mercury
60	4864057	cm Hg	centimetre of mercury
61	4601657	inHg	inch of mercury
62	4408652	°C	degree Celsius
63	4932940	K	kelvin
64	4604232	°F	degree Fahrenheit
65			degree-days-Celsius
66			degree-days-Fahrenheit
67			years
68	5066574	mo	month
69	5719365	wk	week
70	4473177	d	day
71	4740434	h	hour
72	5065038	min	minute [unit of time]
73	5457219	s	second [unit of time]
74	5067859	m/s	metre per second
75	4934984	km/h	kilometre per hour
76	18003	ft/s	foot per second
77	18002	ft/min	foot per minute
78	18509	mile/h	mile per hour (statute mile)
79	4609105	ft³	cubic foot
80	5067857	m³	cubic metre
81			imperial-gallons
82	5002322	l	litre
83	4672588	gal (US)	gallon (US)
84	12876	ft³/min	cubic foot per minute
85	5067091	m³/s	cubic metre per second
86	18227	gal (UK) /min	Imperial gallon per minute
87	4666673	l/s	litre per second
88	19506	l/min	litre per minute
89	18226	gal (US) /min	US gallon per minute
90	17476	°	degree [unit of angle]
91	4731186	°C/h	degree Celsius per hour
92	4731187	°C/min	degree Celsius per minute
93	4862515	°F/h	degree Fahrenheit per hour
94	4862516	°F/min	degree Fahrenheit per minute
95			no-units
96			parts-per-million
97			parts-per-billion
98	20529	%	percent
99			percent-per-second
100			per-minute
101			per-second
102			psi-per-degree-Fahrenheit
103			radians
104	5394509	r/min	revolutions per minute
105			currency1
106			currency2
107			currency3
108			currency4
109			currency5
110			currency6
111			currency7
112			currency8
113			currency9
114			currency10
115	4804171	in²	square inch
116	4410699	cm²	square centimetre
117	16730	BtuIT/lb	British thermal unit (international table) per pound
118	4410708	cm	centimetre
119			pounds-mass-per-second
120			delta-degrees-Fahrenheit
121			delta-degrees-Kelvin
122	4338745	kΩ	kiloohm
123	4339509	MΩ	megaohm
124	12890	mV	millivolt
125	4338738	kJ/kg	kilojoule per kilogram
126	13122	MJ	megajoule
127			joules-per-degree-Kelvin
128			joules-per-kilogram-degree-Kelvin
129	5064794	kHz	kilohertz
130	4933722	MHz	megahertz
131			per-hour
132	4404017	mW	milliwatt
133	4274487	hPa	hectopascal
134	5063250	mbar	millibar
135	5067080	m³/h	cubic metre per hour
136			liters-per-hour
137			kilowatt-hours-per-square-meter
138			kilowatt-hours-per-square-foot
139			megajoules-per-square-meter
140			megajoules-per-square-foot
141			watts-per-square-meter-degree-kelvin
142			cubic-feet-per-second
143			percent-obscuration-per-foot
144			percent-obscuration-per-meter
145	4535349	mΩ	milliohm
146	5068616	MW·h	megawatt hour (1000 kW.h)
147			kilo-btus
148			mega-btus
149			kilojoules-per-kilogram-dry-air
150			megajoules-per-kilogram-dry-air
151			kilojoules-per-degree-Kelvin
152			megajoules-per-degree-Kelvin
153	5129559	N	newton
154	4600377	g/s	gram per second
155	4600376	g/min	gram per minute
156	4534584	t/h	tonne per hour
157			kilo-btus-per-hour
158			hundredths-seconds
159	4403766	ms	millisecond
160	20053	N·m	newton metre
161	4403510	mm/s	millimetre per second
162	4732977	mm/min	millimetre per minute
163	12888	m/min	metre per minute
164	5060144	m/h	metre per hour
165	4666675	m³/min	cubic metre per minute
166	5067595	m/s²	metre per second squared
167	16709	A/m	ampere per metre
168	4273201	A/m²	ampere per square metre
169	16693	A·m²	ampere square metre
170	4604242	F	farad
171	14385	H	henry
172	4404785	Ω·m	ohm metre
173	5458245	S	siemens
174	4469040	S/m	siemens per metre
175	4469555	T	tesla
176	4469816	V/K	volt per kelvin
177	4470064	V/m	volt per metre
178	5719362	Wb	weber
179	4408396	cd	candela
180	4272692	cd/m²	candela per square metre
181	4600112	K/h	kelvin per hour
182	4600113	K/min	kelvin per minute
183	4337976	J·s	joule second
184	12865	rad/s	radian per second
185	4732217	m²/N	square metre per newton
186	4934993	kg/m³	kilogram per cubic metre
187	4404535	N·s	newton second
188	13392	N/m	newton per metre
189	4470067	W/(m·K)	watt per metre kelvin
190	4340025	µS	microsiemens
191	12875	ft³/h	cubic foot per hour
192			us-gallons-per-hour
193	4934996	km	kilometre
194	13384	µm	micrometre (micron)
195	4674125	g	gram
196	5064525	mg	milligram
197	5065812	ml	millilitre
198	13360	ml/s	millilitre per second
199	12878	dB	decibel
200			decibels-millivolt
201			decibels-volt
202	4403767	mS	millisiemens
203			watt-hours-reactive
204			kilowatt-hours-reactive
205			megawatt-hours-reactive
206			millimeters-of-water
207			per-mille
208			grams-per-gram
209	5059129	kg/kg	kilogram per kilogram
210			grams-per-kilogram
211	4732468	mg/g	milligram per gram
212	20033	mg/kg	milligram per kilogram
213	18250	g/ml	gram per millilitre
214	18252	g/l	gram per litre
215	19761	mg/l	milligram per litre
216	4731449	µg/l	microgram per litre
217	4274483	g/m³	gram per cubic metre
218	18256	mg/m³	milligram per cubic metre
219	18257	µg/m³	microgram per cubic metre
220			nanograms-per-cubic-meter
221	12851	g/cm³	gram per cubic centimetre
222	4346188	Bq	becquerel
223	12881	kBq	kilobecquerel
224	13390	MBq	megabecquerel
225	4274485	Gy	gray
226	4403507	mGy	milligray
227			microgray
228	4469043	Sv	sievert
229	4403768	mSv	millisievert
230			microsieverts
231	5257010	µSv/h	microsievert per hour
232			decibels-a
233			nephelometric-turbidity-unit
234	5321520	pH	pH (potential of Hydrogen)
235	18253	g/m²	gram per square metre
236			minutes-per-degree-kelvin