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CIM 300 / CIM 500 BACnet (pumps)

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Grundfos CIM 300 / CIM 500 BACnet (pumps) BACnet points list

Updated 28 October 2026

Short answer

The CIM 300 add-on module (or CIU 300 box) gives Grundfos electronic pumps a BACnet MS/TP interface; the CIM 500 does the same over BACnet IP. The pump functional profile is a fixed object list: status binary inputs, command binary outputs, multistate objects for control and operating mode, analog inputs for measured values and counters, analog outputs for setpoint and flow limit, and analog values for module configuration. Many points depend on pump family, MGE motor model (G, H or later) and fitted sensors.

This page lists 105 BACnet objects for the Grundfos CIM 300 / CIM 500 BACnet (pumps) — 21 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Grundfos’s own free documentation, linked below.

Manufacturer: Grundfos
Model: CIM 300 / CIM 500 BACnet (pumps)
Equipment: Pump communication module
Equipment type: VFDs & pumps
BACnet objects: 105 (21 writable)
Transport: BACnet MS/TP, BACnet IP
Firmware: Not stated
Default device instance: 227000 + MAC address (CIM 300 default); custom value via AV 0 with SW3 on
Also known as: CIM 300, CIU 300, CIM 500, CIU 500, CIM300, MAGNA3, TPE, MGE, CUE, E-pumps
Source document: BACnet for Grundfos pumps, CIM/CIU 300 BACnet MS/TP, CIM/CIU 500 Ethernet for BACnet IP - Functional profile and user manual · 97572650 · rev. 09.2025

Download CSV 105 rows Download EDE B.I.G.-EU JSON Manufacturer PDF ↗ Compare with your scan Download Easy BACnet Mobile App Google Play

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

BMS integration notes: Grundfos CIM 300 / CIM 500 BACnet (pumps)

Integration in brief

Set the control mode (MO 0), operating mode (MO 1) and setpoint (AO 0) first, then take control by writing BO 0 = 1 (bus control). Set AV 1 so the pump drops back to its local settings if BACnet goes quiet. Read status from the BI, MI and AI objects, and reset faults with BO 4.

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
BO 0	Set control source	Takes bus control (1) or gives it back (0)	Write
MO 1	Set operating mode	Start/stop: 1 = Start, 2 = Stop	Write
MO 0	Set control mode	Control mode, e.g. constant or proportional pressure	Write
AO 0	Set setpoint	Setpoint in % of range or nominal frequency	Write
BO 4	Reset fault	Resets an alarm on a 0-to-1 edge (bus control only)	Write
BI 0	Control source status	Confirms bus control; drops to local if the watchdog trips	Read
BI 2	Rotation status	Pump running	Read
AI 9	Actual setpoint	Setpoint actually in use	Read
AI 0	Fault code	Active Grundfos alarm code	Read

Enable & remote start

Write the desired control mode (MO 0), operating mode (MO 1, 1 = Start, 2 = Stop) and setpoint (AO 0), then set BO 0 Set control source = 1 for bus control. BI 0 and MI 14 show the active control source. Relay, reset and simulation commands only act while bus control is on.

Heartbeat & communication loss

AV 1 BACnet watchdog: 0 = disabled (default), or 5-3600 s. If no BACnet traffic is seen for that time while in bus control, the pump switches to local control and uses its local settings. After comms return the BAS must set BO 0 back to 1. Make the local settings first (Grundfos GO or PC Tool).

Sensors & values from the BMS

AV 12 Remote sensor feedback lets the BAS send the sensor value (0-100 %) to MAGNA3 and MGE model H and later pumps.

Network setup

CIM 300 default device instance is 227000 + MAC address (227000-227127); for a custom value write AV 0 and turn DIP switch SW3 on.
MAC address is set with the hexadecimal rotary switches.
MS/TP baud with DIP switches SW4/SW5: 9600 (default), 19200, 38400 or 76800.
CIM 500 (BACnet IP) is set up from its built-in webserver; factory webserver address 192.168.1.100.

Watch out for

A setpoint of 0 does not stop the pump; use MO 1 = 2 (Stop).
AO 0 is a percentage: of the setpoint range in closed-loop modes and of nominal frequency in open loop. Use AI 133/134 and the sensor range to scale.
The manual's fault section refers to the fault and warning codes as AV 0 / AV 1, but the object tables list them as AI 0 / AI 1.
Many points only exist on certain pump families or MGE model G/H, or need an external sensor.

Grundfos CIM 300 / CIM 500 BACnet (pumps) 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.

105 of 105 shown

Type

Access

Units

Show

Grundfos CIM 300 / CIM 500 BACnet (pumps) BACnet Points List
			Description			States
BImin	0	Control source status	Whether the pump is under local or bus control		Read	0=Local control, 1=Bus control
BI	1	Actual direction	Impeller rotation direction		Read	0=Clockwise, 1=Counterclockwise
BImin	2	Rotation status	Pump running		Read	0=No rotation, 1=Rotation (pump running)
BI	3	At minimum speed	Running at minimum speed		Read	0=Not at minimum speed, 1=At minimum speed
BI	4	At maximum speed	Running at maximum speed		Read	0=Not at maximum speed, 1=At maximum speed
BI	9	Low Flow stop active	Low flow stop function active		Read	0=Not active, 1=Active
BI	11	Digital input 1 status	Digital input 1 state		Read	0=Not active, 1=Active
BI	12	Digital input 2 status	Digital input 2 state		Read	0=Not active, 1=Active
BI	13	Digital input 3 status	Digital input 3 state		Read	0=Not active, 1=Active
BI	14	Digital output 1 status	Digital output 1 state		Read	0=Not active, 1=Active
BI	15	Digital output 2 status	Digital output 2 state		Read	0=Not active, 1=Active
BI	28	Fault simulation status	Fault simulation running		Read	0=Not active, 1=Active
BI	31	At power limit	Running at power limit		Read	0=Not at power limit, 1=At power limit
BI	38	Setpoint influence	Setpoint influence active		Read	0=Not active, 1=Active
BI	39	Max. flow limit	Maximum flow limit active		Read	0=Not active, 1=Active
BI	62	Flow estimation below range	Estimated flow below the estimation range		Read	0=Inside range, 1=Below range
BI	63	Flow estimation above range	Estimated flow above the estimation range		Read	0=Not above range, 1=Above range
BI	64	Forced to local	Pump forced to local control		Read	0=Not forced to local, 1=Forced to local
BI	86	Status direct control (Positive Kp)	Direct control (positive Kp) status		Read	0=Disabled, 1=Enabled (positive Kp)
BOmin	0	Set control source	Selects local or BACnet (bus) control		Write	0=Local control (default), 1=Bus control
BO	1	Relay 1 control	Relay 1 command when bus control and bus relay mode are set		Write	0=Closed (default), 1=Open
BO	2	Relay 2 control	Relay 2 command when bus control and bus relay mode are set		Write	0=Closed (default), 1=Open
BOmin	4	Reset fault	Resets an alarm on a rising edge (bus control only)		Write	0=No reset (default), 1=Reset
BO	5	Fault simulation	Turns on a simulated fault (bus control only)		Write	0=Disabled (default), 1=Enabled
BO	6	Copy settings to local	Copies remote settings to local settings on remote-to-local change		Write	0=Disabled, 1=Enabled
BO	9	Enable max. flow limit	Enables the maximum flow limit		Write	0=Disabled, 1=Enabled
BO	21	Set direct control	Selects direct (positive Kp) or reverse control		Write	0=Disabled (negative Kp), 1=Enabled (positive Kp)
MI	0	Actual control mode	Control mode currently in use		Read	1=Constant speed, 2=Constant pressure, 3=Proportional pressure, 4=Automatic/AUTOADAPT, 5=Constant flow, 6=Constant temperature, 7=Constant level, 8=Constant percentage, 9=FLOWADAPT, 10=Closed-loop sensor control, 11=Constant diff. pressure, 12=Constant diff. temperature
MI	1	Actual operating mode	Operating mode currently in use		Read	1=Start (normal), 2=Stop, 3=Minimum, 4=Maximum, 5=User curve
MI	2	Next bearing-service type	Type of the next bearing service		Read	1=Service type unknown, 2=Lubricate bearings, 3=Change bearings
MI	3	CIM status	CIM module health		Read	1=OK, 2=EEPROM fault, 3=Memory fault
MI	11	Feedback sensor unit	Engineering unit of the feedback sensor		Read	1=Unknown, 2=bar, 3=mbar, 4=m, 5=kPa, 6=psi, 7=ft, 8=m3/h, 9=m3/s, 10=l/s, 11=gpm, 12=°C, 13=°F, 14=%, 15=K, 16=l/h
MI	14	Control Source	Where the pump is currently controlled from		Read	1=Display, 2=Bus, 3=Handheld, 4=Digital in, 5=ON/OFF button
MOmin	0	Set control mode	Sets the control mode (bus control only)		Write	1=Constant speed (default), 2=Constant pressure, 3=Proportional pressure, 4=Automatic/AUTOADAPT, 5=Constant flow, 6=Constant temperature, 7=Constant level, 8=Constant percentage, 9=FLOWADAPT, 10=Closed-loop sensor control, 11=Constant diff. pressure, 12=Constant diff. temperature
MOmin	1	Set operating mode	Sets the operating mode (bus control only)		Write	1=Start (normal), 2=Stop (default), 3=Minimum, 4=Maximum
MO	2	Product simulation	Simulates a pump type for commissioning without a pump		Write	1=Disabled (default), 2=MAGNA, 3=E-pumps 0.25-7.5 kW, 4=E-pumps 11-22 kW / CUE, 8=MAGNA3, 9=E-pumps based on MGE model H
AImin	0	Fault code	Grundfos alarm (fault) code		Read
AI	1	Warning code	Grundfos warning code		Read
AI	2	Time to bearing service	Months until bearing service (24 means 24 or more)	month	Read
AI	3	Capacity	Actual capacity value (process feedback)	%	Read
AI	4	Head	Actual system head/pressure	bar	Read
AI	5	Flow	Actual system flow rate	m3/h	Read
AI	6	Relative performance	Performance relative to maximum performance	%	Read
AI	7	Speed	Motor speed	rpm	Read
AI	8	Frequency	Actual control signal applied to motor	Hz	Read
AImin	9	Actual setpoint	Setpoint in use (% of frequency or sensor range)	%	Read
AI	10	Motor current	Actual motor current	A	Read
AI	11	DC link voltage	Frequency converter DC Link voltage	V	Read
AI	12	Motor voltage	Motor voltage	V	Read
AI	13	Power	Total power consumption of the pump	W	Read
AI	14	Remote flow	Measured flow at external sensor	m3/h	Read
AI	15	Inlet pressure	System inlet pressure	bar	Read
AI	16	Remote pressure	Measured pressure at external sensor	bar	Read
AI	17	Level	Tank level	m	Read
AI	18	Power electronic temp.	Temperature in frequency converter	°C	Read
AI	19	Motor temperature	Motor winding temperature	°C	Read
AI	20	Remote temperature	Temperature at external sensor	°C	Read
AI	21	Electronic temperature	Pump electronics temperature	°C	Read
AI	22	Fluid temperature	Pumped-liquid temperature	°C	Read
AI	23	Bearing temperature DE	Bearing temperature, drive end	°C	Read
AI	24	Bearing temp. NDE	Bearing temperature, non-drive end	°C	Read
AI	25	Auxiliary sensor input	Auxiliary sensor input	%	Read
AI	26	Specific energy	Specific energy consumption	kWh/m3	Read
AI	27	Runtime	Total operating time of the pump	h	Read
AI	28	Total on time	Total power-on time of the pump	h	Read
AI	29	Torque	Motor torque	Nm	Read
AI	30	Energy consumption	Total energy consumption of the pump	kWh	Read
AI	31	Number of starts	Number of times the pump has started		Read
AI	32	Volume	Total pumped volume	m3	Read
AI	37	Outlet pressure	System outlet pressure	bar	Read
AI	57	Remote temperature 2	Temperature at external temperature sensor 2	°C	Read
AI	58	User setpoint	User-selected setpoint (% of frequency or setpoint range)	%	Read
AI	85	Min. of feedback sensor	Minimum value of feedback sensor		Read
AI	86	Max. of feedback sensor	Maximum value of feedback sensor		Read
AI	92	Load percent	Motor current in percent of rated motor current	%	Read
AI	93	Differential pressure	Pressure between pump flanges	bar	Read
AI	95	Actual flow limit	Actual maximum flow limit	m3/h	Read
AI	114	Remote diff. temperature	Differential temperature at remote sensor	°C	Read
AI	115	Inlet diff. pressure	Differential pressure at the inlet pipe	bar	Read
AI	116	Outlet diff. pressure	Differential pressure at the outlet pipe	bar	Read
AI	117	Remote diff. pressure	Differential pressure at remote sensor	bar	Read
AI	118	Storage tank Level	Water level in the storage tank	m	Read
AI	119	Heat energy counter	Accumulated heat energy in pump life	kWh	Read
AI	120	Heat power	Actual heat power	W	Read
AI	121	Heat diff. temperature	Differential temperature (heat)	K	Read
AI	130	Nominal frequency	Nominal pump frequency	Hz	Read
AI	131	Minimum frequency	Minimum frequency in % of nominal frequency	%	Read
AI	132	Maximum frequency	Maximum frequency in % of nominal frequency	%	Read
AI	133	Setpoint range minimum	Setpoint range minimum, % of sensor maximum	%	Read
AI	134	Setpoint range maximum	Setpoint range maximum, % of sensor maximum	%	Read
AI	135	Heat energy counter 2	Heat energy counter 2 (Cooling)	kWh	Read
AI	136	Volume counter 2	Volume counter 2	m3	Read
AI	145	Conductivity	Conductivity, 1 S/m resolution	S/m	Read
AI	146	PhMeasure	pH, 0.1 pH resolution	pH	Read
AI	147	Turbidity	Turbidity, 0.1 NTU resolution	NTU	Read
AOmin	0	Set setpoint	Pump setpoint (bus control only); 0 does not stop the pump	%	Write
AO	5	Set max. flow limit	Maximum flow limit value	m3/h	Write
AV	0	Custom Device Object Instance Number	Custom device instance (used when DIP switch SW3 is on)		Write
AV	1	BACnet watchdog	Watchdog time before falling back to local control; 0 = off	s	Write
AV	2	Simulation fault code	Fault code to simulate; write 0 to clear		Write
AV	3	Simulation warning code	Warning code to simulate; write 0 to clear		Write
AV	9	Product time and date	Pump time and date in UNIX seconds	s	Write
AV	12	Remote sensor feedback	Sensor value written by the BAS (remote feedback)	%	Write
AV	19	Set Kp	Controller proportional gain Kp		Write
AV	20	Set Ti	Controller integral time Ti	s	Write

Object ID lookup: Grundfos CIM 300 / CIM 500 point IDs by name

BI0Control source status
BI1Actual direction
BI2Rotation status
BI3At minimum speed
BI4At maximum speed
BI9Low Flow stop active
BI11Digital input 1 status
BI12Digital input 2 status
BI13Digital input 3 status
BI14Digital output 1 status
BI15Digital output 2 status
BI28Fault simulation status
BI31At power limit
BI38Setpoint influence
BI39Max. flow limit
BI62Flow estimation below range
BI63Flow estimation above range
BI64Forced to local
BI86Status direct control (Positive Kp)
BO0Set control source
BO1Relay 1 control
BO2Relay 2 control
BO4Reset fault
BO5Fault simulation
BO6Copy settings to local
BO9Enable max. flow limit
BO21Set direct control
MI0Actual control mode
MI1Actual operating mode
MI2Next bearing-service type
MI3CIM status
MI11Feedback sensor unit
MI14Control Source
MO0Set control mode
MO1Set operating mode
MO2Product simulation
AI0Fault code
AI1Warning code
AI2Time to bearing service
AI3Capacity
AI4Head
AI5Flow
AI6Relative performance
AI7Speed
AI8Frequency
AI9Actual setpoint
AI10Motor current
AI11DC link voltage
AI12Motor voltage
AI13Power
AI14Remote flow
AI15Inlet pressure
AI16Remote pressure
AI17Level
AI18Power electronic temp.
AI19Motor temperature
AI20Remote temperature
AI21Electronic temperature
AI22Fluid temperature
AI23Bearing temperature DE
AI24Bearing temp. NDE
AI25Auxiliary sensor input
AI26Specific energy
AI27Runtime
AI28Total on time
AI29Torque
AI30Energy consumption
AI31Number of starts
AI32Volume
AI37Outlet pressure
AI57Remote temperature 2
AI58User setpoint
AI85Min. of feedback sensor
AI86Max. of feedback sensor
AI92Load percent
AI93Differential pressure
AI95Actual flow limit
AI114Remote diff. temperature
AI115Inlet diff. pressure
AI116Outlet diff. pressure
AI117Remote diff. pressure
AI118Storage tank Level
AI119Heat energy counter
AI120Heat power
AI121Heat diff. temperature
AI130Nominal frequency
AI131Minimum frequency
AI132Maximum frequency
AI133Setpoint range minimum
AI134Setpoint range maximum
AI135Heat energy counter 2
AI136Volume counter 2
AI145Conductivity
AI146PhMeasure
AI147Turbidity
AO0Set setpoint
AO5Set max. flow limit
AV0Custom Device Object Instance Number
AV1BACnet watchdog
AV2Simulation fault code
AV3Simulation warning code
AV9Product time and date
AV12Remote sensor feedback
AV19Set Kp
AV20Set Ti

Integration notes

Writes to BO 1-6, MO 0-1 and AO 0 only act when bus control is enabled with BO 0 = 1.
If AV 1 (watchdog) is set and BACnet traffic stops for that time, the pump falls back to local control.
Point availability differs between MAGNA3, E-pumps 0.25-7.5 kW and E-pumps 11-22 kW/CUE; many points need MGE model G or H or an external sensor.
On MAGNA and TPE Series 2000 the flow value is estimated and meant for monitoring only.
CIM 300 MS/TP speed is set with DIP switches SW4/SW5 (9600 default, up to 76800).

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 CIM 300 / CIM 500 BACnet (pumps) 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 Grundfos CIM 300 / CIM 500 BACnet (pumps)

How many BACnet points does the Grundfos CIM 300 / CIM 500 BACnet (pumps) have?

This list has 105 BACnet objects: 59 analog inputs, 2 analog outputs, 8 analog values, 19 binary inputs, 8 binary outputs, 6 multi-state inputs, 3 multi-state outputs. The exact set on a given unit depends on its firmware, installed options and configuration.

Which Grundfos CIM 300 / CIM 500 BACnet (pumps) BACnet points are writable?

21 of the 105 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 Grundfos CIM 300 / CIM 500 BACnet (pumps) BACnet documentation?

The source is BACnet for Grundfos pumps, CIM/CIU 300 BACnet MS/TP, CIM/CIU 500 Ethernet for BACnet IP - Functional profile and user manual (97572650), revision 09.2025, published free by Grundfos at https://api.grundfos.com/literature/Grundfosliterature-6012933.pdf.

What are the minimum BACnet points to integrate the Grundfos CIM 300 / CIM 500 BACnet (pumps)?

Start with BO 0 Set control source (Takes bus control (1) or gives it back (0)); MO 1 Set operating mode (Start/stop: 1 = Start, 2 = Stop); MO 0 Set control mode (Control mode, e.g. constant or proportional pressure); AO 0 Set setpoint (Setpoint in % of range or nominal frequency); BO 4 Reset fault (Resets an alarm on a 0-to-1 edge (bus control only)); BI 0 Control source status (Confirms bus control; drops to local if the watchdog trips); BI 2 Rotation status (Pump running); AI 9 Actual setpoint (Setpoint actually in use); AI 0 Fault code (Active Grundfos alarm code).

How do I enable BMS control of the Grundfos CIM 300 / CIM 500 BACnet (pumps)?

Does the Grundfos CIM 300 / CIM 500 BACnet (pumps) need a BACnet heartbeat or have a communication timeout?

Can the BMS supply sensor values to the Grundfos CIM 300 / CIM 500 BACnet (pumps)?

AV 12 Remote sensor feedback lets the BAS send the sensor value (0-100 %) to MAGNA3 and MGE model H and later pumps.

How do I check these points on the real CIM 300 / CIM 500 BACnet (pumps)?

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.

More Grundfos BACnet points lists

Source: BACnet for Grundfos pumps, CIM/CIU 300 BACnet MS/TP, CIM/CIU 500 Ethernet for BACnet IP - Functional profile and user manual · 97572650 · rev. 09.2025. Object names, instances and units are reproduced as published; descriptions are our own.