Crompton Instruments Integra 1221 / 1222 digital metering system, BACnet MS/TP option module BACnet points list

Updated 12 November 2026Unofficial source

Short answer

The Integra 1221/1222 is a multifunction electricity meter; a plug-on option module adds BACnet MS/TP. All measurements are read-only Analog Inputs (175 objects: per-phase and system voltage, current, power, VA, VAr, power factor, energy, demand, THD, min/max values and vector angles), and 17 Analog Values hold the meter settings such as demand period, CT and VT ratios and baud rate.

This page lists 192 BACnet objects for the Crompton Instruments Integra 1221 / 1222 digital metering system, BACnet MS/TP option module — 14 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from a copy of Crompton Instruments’s documentation hosted by Colterlec, not by Crompton Instruments itself, so treat it as unofficial.

Manufacturer: Crompton Instruments
Model: Integra 1221 / 1222 digital metering system, BACnet MS/TP option module
Equipment: Power meter (multifunction)
Equipment type: Thermostats, sensors & meters
BACnet objects: 192 (14 writable)
Transport: BACnet MS/TP
Firmware: Application software 001.000.016 (PICS dated June 12th 2012)
Also known as: Integra 1221, Integra 1222, INT-1221, INT-1222, Integra 12xx, 3L57501, Crompton Integra BACnet, TE Connectivity Integra
Source document: Integra INT-1221/1222 BACnet MSTP Communication, Setup and Operation Guide · 3L57501 Rev.03 (unofficial copy, hosted by Colterlec)

Download CSV 192 rows Download EDE B.I.G.-EU JSON Source PDF (unofficial copy) ↗ Compare with your scan Download Easy BACnet Mobile App Google Play

Reference only, provided as-is: verify against Crompton Instruments’s current documentation and the live device before use. Not official Crompton Instruments information. Terms of use.

BMS integration notes: Crompton Instruments Integra 1221 / 1222 digital metering system, BACnet MS/TP option module

Integration in brief

Set the MS/TP MAC address (1-127) and identity mode on the meter's Comms menu, then read the AI objects. Nothing has to be written for monitoring; settings live in the AV objects.

Minimum points to map

The short list most integrators start with — enough to run the unit from a BMS. Map more as the job needs.

Object	Name	Why	Access
AI 24	PSum	Total active power (sum of phases), W	Read
AI 30	ImpWh	Import energy, Wh	Read
AI 35	PSumDmd	Import power demand, W	Read
AI 21	VLNAvg	Average line-to-neutral voltage	Read
AI 22	AAvg	Average line current	Read
AI 27	PFTot	Total system power factor	Read
AI 29	Frq	Frequency, Hz	Read

Network setup

MS/TP, default 38400 baud, no parity, 1 stop bit; MAC address 1-127, default 001.
The Identity setting picks whether the device instance is the MAC address or a 22-bit instance number.
Baud can also be changed through AV 16; power-cycle the meter to apply.

Watch out for

With the BACnet module fitted no other external protocol is available.
Writing 0 to AV 13 resets the energy readings.

Crompton Instruments Integra 1221 / 1222 digital metering system, BACnet MS/TP option module BACnet objects

Type: AI, AO, AV, BI, BO, BV, MI/MO/MV (multi-state) · Access: Read read-only, Write writable, Command writable with a priority array.

192 of 192 shown

Type

Access

Units

Show

Crompton Instruments Integra 1221 / 1222 digital metering system, BACnet MS/TP option module BACnet Points List
			Description
AI	0	V1	Phase 1 line to neutral voltage	V	Read
AI	1	V2	Phase 2 line to neutral voltage	V	Read
AI	2	V3	Phase 3 line to neutral voltage	V	Read
AI	3	A1	Line 1 current	A	Read
AI	4	A2	Line 2 current	A	Read
AI	5	A3	Line 3 current	A	Read
AI	6	P1	Phase 1 power	W	Read
AI	7	P2	Phase 2 power	W	Read
AI	8	P3	Phase 3 power	W	Read
AI	9	VA1	Phase 1 VA	VA	Read
AI	10	VA2	Phase 2 VA	VA	Read
AI	11	VA3	Phase 3 VA	VA	Read
AI	12	VAr1	Phase 1 VAr	var	Read
AI	13	VAr2	Phase 2 VAr	var	Read
AI	14	VAr3	Phase 3 VAr	var	Read
AI	15	PF1	Phase 1 power factor		Read
AI	16	PF2	Phase 2 power factor		Read
AI	17	PF3	Phase 3 power factor		Read
AI	18	PA1	Phase 1 phase angle	°	Read
AI	19	PA2	Phase 2 phase angle	°	Read
AI	20	PA3	Phase 3 phase angle	°	Read
AImin	21	VLNAvg	Average line to neutral voltage	V	Read
AImin	22	AAvg	Average line current	A	Read
AI	23	ASum	Sum of line currents	A	Read
AImin	24	PSum	Sum of phase powers	W	Read
AI	25	VASum	Sum of phase VAs	VA	Read
AI	26	VArSum	Sum of phase VArs	var	Read
AImin	27	PFTot	Total system power factor		Read
AI	28	PATot	Total system phase angle	°	Read
AImin	29	Frq	System frequency	Hz	Read
AImin	30	ImpWh	Import Watt hours	Wh	Read
AI	31	ExpWh	Export Watt hours	Wh	Read
AI	32	ImpVArh	Import VAr hours	varh	Read
AI	33	ExpVArh	Export VAr hours	varh	Read
AI	34	VAh	VA hours	VAh	Read
AImin	35	PSumDmd	Import power sum demand	W	Read
AI	36	PSumDmdMax	Maximum import power sum demand	W	Read
AI	37	VASumDmd	VA sum demand	VA	Read
AI	38	VASumDmdMax	Maximum VA sum demand	VA	Read
AI	39	ASumDmd	Current sum demand	A	Read
AI	40	ASumDmdMax	Maximum current sum demand	A	Read
AI	41	V1Max	Maximum phase 1 line to neutral voltage	V	Read
AI	42	V1Min	Minimum phase 1 line to neutral voltage	V	Read
AI	43	V2Max	Maximum phase 2 line to neutral voltage	V	Read
AI	44	V2Min	Minimum phase 2 line to neutral voltage	V	Read
AI	45	V3Max	Maximum phase 3 line to neutral voltage	V	Read
AI	46	V3Min	Minimum phase 3 line to neutral voltage	V	Read
AI	47	A1Max	Maximum line 1 current	A	Read
AI	48	A1Min	Minimum line 1 current	A	Read
AI	49	A2Max	Maximum line 2 current	A	Read
AI	50	A2Min	Minimum line 2 current	A	Read
AI	51	A3Max	Maximum line 3 current	A	Read
AI	52	A3Min	Minimum line 3 current	A	Read
AI	53	VLNAvgMax	Maximum average line to neutral voltage	V	Read
AI	54	VLNAvgMin	Minimum average line to neutral voltage	V	Read
AI	55	AAvgMax	Maximum average line current	A	Read
AI	56	AAvgMin	Minimum average line current	A	Read
AI	57	ASumMax	Maximum sum of line currents	A	Read
AI	58	ASumMin	Minimum sum of line currents	A	Read
AI	59	P1Max	Maximum phase 1 power	W	Read
AI	60	P1Min	Minimum phase 1 power	W	Read
AI	61	P2Max	Maximum phase 2 power	W	Read
AI	62	P2Min	Minimum phase 2 power	W	Read
AI	63	P3Max	Maximum phase 3 power	W	Read
AI	64	P3Min	Minimum phase 3 power	W	Read
AI	65	PSumMax	Maximum sum of phase powers	W	Read
AI	66	PSumMin	Minimum sum of phase powers	W	Read
AI	67	VAr1Max	Maximum phase 1 VArs	var	Read
AI	68	VAr1Min	Minimum phase 1 VArs	var	Read
AI	69	VAr2Max	Maximum phase 2 VArs	var	Read
AI	70	VAr2Min	Minimum phase 2 VArs	var	Read
AI	71	VAr3Max	Maximum phase 3 VArs	var	Read
AI	72	VAr3Min	Minimum phase 3 VArs	var	Read
AI	73	VArSumMax	Maximum sum of phase VArs	var	Read
AI	74	VArSumMin	Minimum sum of phase VArs	var	Read
AI	75	VA1Max	Maximum phase 1 VAs	VA	Read
AI	76	VA1Min	Minimum phase 1 VAs	VA	Read
AI	77	VA2Max	Maximum phase 2 VAs	VA	Read
AI	78	VA2Min	Minimum phase 2 VAs	VA	Read
AI	79	VA3Max	Maximum phase 3 VAs	VA	Read
AI	80	VA3Min	Minimum phase 3 VAs	VA	Read
AI	81	VASumMax	Maximum sum of phase VAs	VA	Read
AI	82	VASumMin	Minimum sum of phase VAs	VA	Read
AI	83	FrqMax	Maximum system voltage frequency	Hz	Read
AI	84	FrqMin	Minimum system voltage frequency	Hz	Read
AI	85	V12	Voltage line 1 to line 2	V	Read
AI	86	V23	Voltage line 2 to line 3	V	Read
AI	87	V31	Voltage line 3 to line 1	V	Read
AI	88	VLLAvg	Average line to line voltage	V	Read
AI	89	V12Max	Maximum line 1 to line 2 voltage	V	Read
AI	90	V12Min	Minimum line 1 to line 2 voltage	V	Read
AI	91	V23Max	Maximum line 2 to line 3 voltage	V	Read
AI	92	V23Min	Minimum line 2 to line 3 voltage	V	Read
AI	93	V31Max	Maximum line 3 to line 1 voltage	V	Read
AI	94	V31Min	Minimum line 3 to line 1 voltage	V	Read
AI	95	VLLAvgMax	Maximum average line to line voltage	V	Read
AI	96	VLLAvgMin	Minimum average line to line voltage	V	Read
AI	97	ANeu	Neutral current	A	Read
AI	98	ANeuMax	Maximum neutral current	A	Read
AI	99	ANeuMin	Minimum neutral current	A	Read
AI	100	ANDmd	Neutral current demand	A	Read
AI	101	ANDmdMax	Maximum neutral current demand	A	Read
AI	102	V1THD	Phase 1 line to neutral voltage THD	%	Read
AI	103	V2THD	Phase 2 line to neutral voltage THD	%	Read
AI	104	V3THD	Phase 3 line to neutral voltage THD	%	Read
AI	105	A1THD	Line 1 current THD	%	Read
AI	106	A2THD	Line 2 current THD	%	Read
AI	107	A3THD	Line 3 current THD	%	Read
AI	108	VTHDAvg	Average line to neutral voltage THD	%	Read
AI	109	ATHDAvg	Average line current THD	%	Read
AI	110	HRun	Hours run at over minimum load	%	Read
AI	111	PFTot	Total system power factor, times minus one	%	Read
AI	112	A1Dmd	Line 1 current demand	A	Read
AI	113	A2Dmd	Line 2 current demand	A	Read
AI	114	A3Dmd	Line 3 current demand	A	Read
AI	115	A1DmdMax	Maximum line 1 current demand	A	Read
AI	116	A2DmdMax	Maximum line 2 current demand	A	Read
AI	117	A3DmdMax	Maximum line 3 current demand	A	Read
AI	118	PRot	Phase rotation sequence	%	Read
AI	119	VLNBal	Line to neutral voltage out of balance	%	Read
AI	120	ABal	Line current out of balance	%	Read
AI	121	VLNBalMax	Maximum line to neutral voltage out of balance	%	Read
AI	122	VLNBalMin	Minimum line to neutral voltage out of balance	%	Read
AI	123	ABalMax	Maximum line current out of balance	%	Read
AI	124	ABalMin	Minimum line current out of balance	%	Read
AI	125	PF1Max	Maximum phase 1 power factor	%	Read
AI	126	PF1Min	Minimum phase 1 power factor	%	Read
AI	127	PF2Max	Maximum phase 2 power factor	%	Read
AI	128	PF2Min	Minimum phase 2 power factor	%	Read
AI	129	PF3Max	Maximum phase 3 power factor	%	Read
AI	130	PF3Min	Minimum phase 3 power factor	%	Read
AI	131	PFTotMax	Maximum total system power factor	%	Read
AI	132	PFTotMin	Minimum total system power factor	%	Read
AI	133	PATotMax	Maximum total system phase angle	°	Read
AI	134	PATotMin	Minimum total system phase angle	°	Read
AI	135	V1THDMax	Maximum phase 1 line to neutral voltage THD	%	Read
AI	136	V1THDMin	Minimum phase 1 line to neutral voltage THD	%	Read
AI	137	V2THDMax	Maximum phase 2 line to neutral voltage THD	%	Read
AI	138	V2THDMin	Minimum phase 2 line to neutral voltage THD	%	Read
AI	139	V3THDMax	Maximum phase 3 line to neutral voltage THD	%	Read
AI	140	V3THDMin	Minimum phase 3 line to neutral voltage THD	%	Read
AI	141	A1THDMax	Maximum line 1 current THD	%	Read
AI	142	A1THDMin	Minimum line 1 current THD	%	Read
AI	143	A2THDMax	Maximum line 2 current THD	%	Read
AI	144	A2THDMin	Minimum line 2 current THD	%	Read
AI	145	A3THDMax	Maximum line 3 current THD	%	Read
AI	146	A3THDMin	Minimum line 3 current THD	%	Read
AI	147	P1Dmd	Import phase 1 power demand	W	Read
AI	148	P2Dmd	Import phase 2 power demand	W	Read
AI	149	P3Dmd	Import phase 3 power demand	W	Read
AI	150	P1DmdMax	Import phase 1 power demand maximum	W	Read
AI	151	P2DmdMax	Import phase 2 power demand maximum	W	Read
AI	152	P3DmdMax	Import phase 3 power demand maximum	W	Read
AI	153	VA1Dmd	Phase 1 VA demand	VA	Read
AI	154	VA2Dmd	Phase 2 VA demand	VA	Read
AI	155	VA3Dmd	Phase 3 VA demand	VA	Read
AI	156	VA1DmdMax	Phase 1 VA demand maximum	VA	Read
AI	157	VA2DmdMax	Phase 2 VA demand maximum	VA	Read
AI	158	VA3DmdMax	Phase 3 VA demand maximum	VA	Read
AI	159	VTHDAvg	Maximum average line to neutral voltage THD	%	Read
AI	160	VTHDAvg	Minimum average line to neutral voltage THD	%	Read
AI	161	ATHDAvg	Maximum average line current THD	%	Read
AI	162	ATHDAvg	Minimum average line current THD	%	Read
AI	163	PA1Max	Maximum phase 1 phase angle	°	Read
AI	164	PA2Max	Maximum phase 2 phase angle	°	Read
AI	165	PA3Max	Maximum phase 3 phase angle	°	Read
AI	166	PA1Min	Minimum phase 1 phase angle	°	Read
AI	167	PA2Min	Minimum phase 2 phase angle	°	Read
AI	168	PA3Min	Minimum phase 3 phase angle	°	Read
AI	169	V1 Vector Angle	V1 vector angle	°	Read
AI	170	V2 Vector Angle	V2 vector angle	°	Read
AI	171	V3 Vector Angle	V3 vector angle	°	Read
AI	172	A1 Vector Angle	A1 vector angle	°	Read
AI	173	A2 Vector Angle	A2 vector angle	°	Read
AI	174	A3 Vector Angle	A3 vector angle	°	Read
AV	0	Dmd	Demand time; write 0 to reset the demand period	min	Write
AV	1	Dmd Period	Demand period: 8, 15, 20, 30 or 60	min	Write
AV	2	Sys Volts	System (VT primary) voltage; password protected	V	Write
AV	3	Sys Current	CT primary current; password protected	A	Write
AV	4	SYS Type	System type: 1 = 1ph2w, 2 = 3ph3w, 3 = 3ph4w; protected		Write
AV	5	Relay Pulse Width	Relay pulse width, multiples of 20 ms		Write
AV	6	Relay Pulse Divisor	Relay pulse rate divisor		Write
AV	7	Password	Password to unlock protected settings		Write
AV	8	Sys Power	Maximum system power (read only)	W	Read
AV	9	Hi Serial	Serial number, high part		Read
AV	10	Lo Serial	Serial number, low part		Read
AV	11	Selected Energy Param	Relay selected for editing (no relays on MS/TP)		Write
AV	12	Hrs Run VA	Load threshold for the hours-run counter		Write
AV	13	Reset Parameter	Write 0 to reset energy readings		Write
AV	14	Secondary Volts	VT secondary voltage; password protected	V	Write
AV	15	Energy Prefix	Energy units prefix: unit, k, M or G		Write
AV	16	BACnet Baud Rate	MS/TP baud: 9600, 19200, 38400; power cycle to apply		Write

Object ID lookup: Crompton Instruments Integra 1221 / 1222 digital metering system, BACnet MS/TP option module point IDs by name

AI0V1
AI1V2
AI2V3
AI3A1
AI4A2
AI5A3
AI6P1
AI7P2
AI8P3
AI9VA1
AI10VA2
AI11VA3
AI12VAr1
AI13VAr2
AI14VAr3
AI15PF1
AI16PF2
AI17PF3
AI18PA1
AI19PA2
AI20PA3
AI21VLNAvg
AI22AAvg
AI23ASum
AI24PSum
AI25VASum
AI26VArSum
AI27PFTot
AI28PATot
AI29Frq
AI30ImpWh
AI31ExpWh
AI32ImpVArh
AI33ExpVArh
AI34VAh
AI35PSumDmd
AI36PSumDmdMax
AI37VASumDmd
AI38VASumDmdMax
AI39ASumDmd
AI40ASumDmdMax
AI41V1Max
AI42V1Min
AI43V2Max
AI44V2Min
AI45V3Max
AI46V3Min
AI47A1Max
AI48A1Min
AI49A2Max
AI50A2Min
AI51A3Max
AI52A3Min
AI53VLNAvgMax
AI54VLNAvgMin
AI55AAvgMax
AI56AAvgMin
AI57ASumMax
AI58ASumMin
AI59P1Max
AI60P1Min
AI61P2Max
AI62P2Min
AI63P3Max
AI64P3Min
AI65PSumMax
AI66PSumMin
AI67VAr1Max
AI68VAr1Min
AI69VAr2Max
AI70VAr2Min
AI71VAr3Max
AI72VAr3Min
AI73VArSumMax
AI74VArSumMin
AI75VA1Max
AI76VA1Min
AI77VA2Max
AI78VA2Min
AI79VA3Max
AI80VA3Min
AI81VASumMax
AI82VASumMin
AI83FrqMax
AI84FrqMin
AI85V12
AI86V23
AI87V31
AI88VLLAvg
AI89V12Max
AI90V12Min
AI91V23Max
AI92V23Min
AI93V31Max
AI94V31Min
AI95VLLAvgMax
AI96VLLAvgMin
AI97ANeu
AI98ANeuMax
AI99ANeuMin
AI100ANDmd
AI101ANDmdMax
AI102V1THD
AI103V2THD
AI104V3THD
AI105A1THD
AI106A2THD
AI107A3THD
AI108VTHDAvg
AI109ATHDAvg
AI110HRun
AI111PFTot
AI112A1Dmd
AI113A2Dmd
AI114A3Dmd
AI115A1DmdMax
AI116A2DmdMax
AI117A3DmdMax
AI118PRot
AI119VLNBal
AI120ABal
AI121VLNBalMax
AI122VLNBalMin
AI123ABalMax
AI124ABalMin
AI125PF1Max
AI126PF1Min
AI127PF2Max
AI128PF2Min
AI129PF3Max
AI130PF3Min
AI131PFTotMax
AI132PFTotMin
AI133PATotMax
AI134PATotMin
AI135V1THDMax
AI136V1THDMin
AI137V2THDMax
AI138V2THDMin
AI139V3THDMax
AI140V3THDMin
AI141A1THDMax
AI142A1THDMin
AI143A2THDMax
AI144A2THDMin
AI145A3THDMax
AI146A3THDMin
AI147P1Dmd
AI148P2Dmd
AI149P3Dmd
AI150P1DmdMax
AI151P2DmdMax
AI152P3DmdMax
AI153VA1Dmd
AI154VA2Dmd
AI155VA3Dmd
AI156VA1DmdMax
AI157VA2DmdMax
AI158VA3DmdMax
AI159VTHDAvg
AI160VTHDAvg
AI161ATHDAvg
AI162ATHDAvg
AI163PA1Max
AI164PA2Max
AI165PA3Max
AI166PA1Min
AI167PA2Min
AI168PA3Min
AI169V1 Vector Angle
AI170V2 Vector Angle
AI171V3 Vector Angle
AI172A1 Vector Angle
AI173A2 Vector Angle
AI174A3 Vector Angle
AV0Dmd
AV1Dmd Period
AV2Sys Volts
AV3Sys Current
AV4SYS Type
AV5Relay Pulse Width
AV6Relay Pulse Divisor
AV7Password
AV8Sys Power
AV9Hi Serial
AV10Lo Serial
AV11Selected Energy Param
AV12Hrs Run VA
AV13Reset Parameter
AV14Secondary Volts
AV15Energy Prefix
AV16BACnet Baud Rate

Integration notes

In the printed Analog Value table the description column is out of step with the names: the texts for AV 6-10 sit one row low and AV 13's reset text sits on the AV 6 row. The descriptions and access here are paired by content (e.g. the serial-number text goes with Hi Serial, the reset text with Reset Parameter).
AI 32-34 (VAr hours and VA hours) use units the PICS marks as not ASHRAE-defined (enumerations 0xF2 / 0xEF; VA hours is proprietary 257).
AI 110 HRun and AI 111 PFTot are printed with units 'percent'.
AI 159-162 repeat the names VTHDAvg / ATHDAvg for the maximum and minimum values, as printed.
Some Analog Values are protected: write the password to AV 7 first.

Check it against the live device. A points list tells you what the controller can expose; the unit in front of you may differ by firmware or installed options. This list is provided as-is for reference only and may contain mistakes — confirming it before you write, map or commission anything is up to you (terms). Easy BACnet scans a network for BACnet IP devices from an Android phone, reads every object on the Integra 1221 / 1222 digital metering system, BACnet MS/TP option module and exports what it actually has to Excel — free. New to BACnet? Start with what a BACnet points list is and what the object types mean.

Questions about the Crompton Instruments Integra 1221 / 1222 digital metering system, BACnet MS/TP option module

How many BACnet points does the Crompton Instruments Integra 1221 / 1222 digital metering system, BACnet MS/TP option module have?

This list has 192 BACnet objects: 175 analog inputs, 17 analog values. The exact set on a given unit depends on its firmware, installed options and configuration.

Which Crompton Instruments Integra 1221 / 1222 digital metering system, BACnet MS/TP option module BACnet points are writable?

14 of the 192 objects accept a write. Points marked Command have a priority array: a write holds until it is released, so release it back to automatic when you are done.

Where is the official Crompton Instruments Integra 1221 / 1222 digital metering system, BACnet MS/TP option module BACnet documentation?

Crompton Instruments does not publish it on its own website. This list comes from Integra INT-1221/1222 BACnet MSTP Communication, Setup and Operation Guide (3L57501 Rev.03), a copy hosted by Colterlec at https://colterlec.com.au/wp-content/uploads/2023/08/3L57501-INT-12xx-BACnet-MSTP-Operating-Manual-_Colterlec.pdf. Ask Crompton Instruments or its representative for the current revision.

What are the minimum BACnet points to integrate the Crompton Instruments Integra 1221 / 1222 digital metering system, BACnet MS/TP option module?

Start with AI 24 PSum (Total active power (sum of phases), W); AI 30 ImpWh (Import energy, Wh); AI 35 PSumDmd (Import power demand, W); AI 21 VLNAvg (Average line-to-neutral voltage); AI 22 AAvg (Average line current); AI 27 PFTot (Total system power factor); AI 29 Frq (Frequency, Hz).

How do I check these points on the real Integra 1221 / 1222 digital metering system, BACnet MS/TP option module?

Scan the network with a BACnet IP browser such as Easy BACnet, open the device and compare its object list with this table. Anything missing is usually an option that isn't installed or a point that is disabled in the controller's configuration.

Source: Integra INT-1221/1222 BACnet MSTP Communication, Setup and Operation Guide · 3L57501 Rev.03. Object names, instances and units are reproduced as published; descriptions are our own.