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CFW300 (BACnet MS/TP)

Variable frequency drive · BACnet points list

WEG CFW300 (BACnet MS/TP) BACnet points list

Updated 6 November 2026

Short answer

The CFW300 runs BACnet MS/TP on its RS-485 port and maps drive parameters to fixed objects: AVs for speed, current, voltage, frequency, torque, heatsink temperature, alarm/fault numbers, ramps and the network speed reference; BVs for the status word (P0680) and control word (P0682); plus digital inputs DI1-DI8, digital outputs DO1-DO4 and two analog outputs. A mailbox (AV 100/101, BV 100/101) reads or writes any parameter by number.

This page lists 60 BACnet objects for the WEG CFW300 (BACnet MS/TP) — 24 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from WEG’s own free documentation, linked below.

Manufacturer: WEG
Model: CFW300 (BACnet MS/TP)
Equipment: Variable frequency drive
Equipment type: VFDs & pumps
BACnet objects: 60 (24 writable)
Transport: BACnet MS/TP
Firmware: Not stated
Default device instance: 359000 + serial address (P0308) when P0760 and P0761 are 0
Also known as: CFW300, WEG CFW300, CFW300 BACnet, 10006901889, CFW320
Source document: BACnet CFW300 User's Manual · 10006901889 / 00 · rev. 2020-01

Download CSV 60 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 WEG’s current documentation and the live device before use. Not official WEG information. Terms of use.

BMS integration notes: WEG CFW300 (BACnet MS/TP)

Integration in brief

Set P0312 = 3 (BACnet MS/TP), the address in P0308 and the baud rate in P0310, then set P0220-P0228 so run/stop, direction and reference come from the serial port. Write BV 16 ramp enable (run/stop) with BV 17 general enable and the speed reference to AV 12 (8192 = rated frequency). Read BV 8, AV 3, AV 1 and BV 15, and reset faults with BV 23.

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
BV 16	Ramp Enable	Start/stop from the BMS (1 = run)	Command
BV 17	General Enable	General enable; must be on to run	Command
BV 20	Remote	Remote mode when P0220 selects serial	Command
AV 12	Serial/USB Speed Ref.	Speed reference, 8192 = rated frequency	Command
BV 23	Fault Reset	Reset a tripped drive	Command
BV 8	Running	Running status	Read
AV 3	Motor Frequency	Output frequency in Hz	Read
AV 1	Motor Current	Motor amps	Read
BV 15	Fault	Any active drive fault	Read
AV 8	Present Fault	Active fault number	Read

Enable & remote start

The drive only obeys the network when P0220-P0228 select the serial option for local/remote, reference, direction and run/stop. It needs both BV 17 General Enable and BV 16 Ramp Enable; BV 20 Remote switches to remote when P0220 takes local/remote from the serial control word.

Heartbeat & communication loss

P0314 Serial Watchdog (0.0-999.0 s, 0 = off, factory 0.0): if no valid telegram arrives within that time the drive shows alarm A128 (or fault F228) and runs the P0313 action: 0 none, 1 ramp stop (factory), 2 general disable, 3 go to local, 4 local keeping commands, 5 fault. Timing starts at the first valid telegram after power-up.

Network setup

P0312 = 3 (BACnet MS/TP); P0308 MS/TP address 0-254.
P0310 baud 9600, 19200, 38400, 57600 or 76800; P0311 must be 0 (8 bits, no parity, 1 stop).
Device instance: P0760 x 10000 + P0761; with both at 0 the drive uses 359000 + P0308 (WEG vendor ID 359).
P0762 max master (factory 127), P0763 max info frames, P0764 I-Am at power-up (factory) or continuously.

Watch out for

Speed reference AV 12 is a 13-bit value, not Hz or %: 8192 = motor rated frequency; negative values reverse.
Ramp times AV 9/10 and the mailbox write change drive parameters; don't write them cyclically.
P0313 = 0 keeps the drive running at the last command after a comm loss.
P0311 factory value is 1 (even parity); BACnet needs 0.

WEG CFW300 (BACnet MS/TP) 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.

60 of 60 shown

Type

Access

Units

Show

WEG CFW300 (BACnet MS/TP) BACnet Points List
			Description			States
AI	0	AI1 Value	Analog input 1 level (P0018)	%	Read
AI	1	AI2 Value	Analog input 2 level (P0019)	%	Read
AO	0	AOx Value 1	Analog output 1 value (P0696)		Command
AO	1	AOx Value 2	Analog output 2 value (P0697)		Command
AV	0	Motor Speed	Motor speed (P0002)	rpm	Read
AVmin	1	Motor Current	Motor current (P0003)	A	Read
AV	2	DC Link Voltage (Ud)	DC bus voltage (P0004)	V	Read
AVmin	3	Motor Frequency	Output frequency (P0005)	Hz	Read
AV	4	Motor Voltage	Output voltage (P0007)	V	Read
AV	5	Motor Torque	Motor torque (P0009)	%	Read
AV	6	Heatsink Temperature	Heatsink temperature (P0030)	°C	Read
AV	7	Present Alarm	Active alarm number (P0048)		Read
AVmin	8	Present Fault	Active fault number (P0049)		Read
AV	9	Acceleration Time	Acceleration ramp time (P0100)	s	Command
AV	10	Deceleration Time	Deceleration ramp time (P0101)	s	Command
AV	11	Speed in 13 bits	Motor speed in 13-bit scale (P0681)		Read
AVmin	12	Serial/USB Speed Ref.	Speed reference from the network, 13-bit (P0683)		Command
AV	100	Mailbox: param. number	Mailbox parameter number		Write
AV	101	Mailbox: param. value	Mailbox parameter value		Write
BI	0	DI1	Digital input 1 (P0012 bit 0)		Read	0=Off, 1=On
BI	1	DI2	Digital input 2 (P0012 bit 1)		Read	0=Off, 1=On
BI	2	DI3	Digital input 3 (P0012 bit 2)		Read	0=Off, 1=On
BI	3	DI4	Digital input 4 (P0012 bit 3)		Read	0=Off, 1=On
BI	4	DI5	Digital input 5 (P0012 bit 4)		Read	0=Off, 1=On
BI	5	DI6	Digital input 6 (P0012 bit 5)		Read	0=Off, 1=On
BI	6	DI7	Digital input 7 (P0012 bit 6)		Read	0=Off, 1=On
BI	7	DI8	Digital input 8 (P0012 bit 7)		Read	0=Off, 1=On
BO	0	DO1	Digital output 1 (P0695 bit 0)		Command	0=Off, 1=On
BO	1	DO2	Digital output 2 (P0695 bit 1)		Command	0=Off, 1=On
BO	2	DO3	Digital output 3 (P0695 bit 2)		Command	0=Off, 1=On
BO	3	DO4	Digital output 4 (P0695 bit 3)		Command	0=Off, 1=On
BV	0	Reservado	Reserved		Read
BV	1	Reservado	Reserved		Read
BV	2	Fire mode	Status word: Fire mode (P0680 bit 2)		Read	0=Off, 1=On
BV	3	Bypass	Status word: Bypass (P0680 bit 3)		Read	0=Off, 1=On
BV	4	Quick Stop	Status word: Quick Stop (P0680 bit 4)		Read	0=Inactive, 1=Active
BV	5	2nd Ramp	Status word: 2nd Ramp (P0680 bit 5)		Read	0=Off, 1=On
BV	6	Config. Mode	Status word: Config. Mode (P0680 bit 6)		Read	0=Normal, 1=Config
BV	7	Alarm	Status word: Alarm (P0680 bit 7)		Read	0=No Alarm, 1=Alarm
BVmin	8	Running	Status word: Running (P0680 bit 8)		Read	0=Stopped, 1=Running
BV	9	Enabled	Status word: Enabled (P0680 bit 9)		Read	0=Disabled, 1=Enabled
BV	10	Forward	Status word: Forward (P0680 bit 10)		Read	0=Reverse, 1=Forward
BV	11	JOG	Status word: JOG (P0680 bit 11)		Read	0=Off, 1=On
BV	12	Remote	Status word: Remote (P0680 bit 12)		Read	0=Local, 1=Remote
BV	13	Subvoltage	Status word: Subvoltage (P0680 bit 13)		Read	0=No, 1=Subvoltage
BV	14	Reservado	Reserved		Read
BVmin	15	Fault	Status word: Fault (P0680 bit 15)		Read	0=No Fault, 1=Fault
BVmin	16	Ramp Enable	Control word: Ramp Enable (P0682 bit 0)		Command	0=Stop, 1=Run
BVmin	17	General Enable	Control word: General Enable (P0682 bit 1)		Command	0=Disable, 1=Enable
BV	18	Run Forward	Control word: Run Forward (P0682 bit 2)		Command	0=Reverse, 1=Forward
BV	19	JOG Enable	Control word: JOG Enable (P0682 bit 3)		Command	0=Off, 1=On
BVmin	20	Remote	Control word: Remote (P0682 bit 4)		Command	0=Local, 1=Remote
BV	21	2nd Ramp	Control word: 2nd Ramp (P0682 bit 5)		Command	0=Off, 1=On
BV	22	Quick Stop	Control word: Quick Stop (P0682 bit 6)		Command	0=Off, 1=On
BVmin	23	Fault Reset	Control word: Fault Reset (P0682 bit 7)		Command	0=Off, 1=Reset
BV	29	Intern PID	Control word: Intern PID (P0682 bit 13)		Command	0=Auto, 1=Manual
BV	30	Extern PID 1	Control word: Extern PID 1 (P0682 bit 14)		Command	0=Auto, 1=Manual
BV	31	Extern PID 2	Control word: Extern PID 2 (P0682 bit 15)		Command	0=Auto, 1=Manual
BV	100	Mailbox: exec. read	Mailbox read trigger		Write
BV	101	Mailbox: exec. write	Mailbox write trigger		Write

Object ID lookup: WEG CFW300 point IDs by name

AI0AI1 Value
AI1AI2 Value
AO0AOx Value 1
AO1AOx Value 2
AV0Motor Speed
AV1Motor Current
AV2DC Link Voltage (Ud)
AV3Motor Frequency
AV4Motor Voltage
AV5Motor Torque
AV6Heatsink Temperature
AV7Present Alarm
AV8Present Fault
AV9Acceleration Time
AV10Deceleration Time
AV11Speed in 13 bits
AV12Serial/USB Speed Ref.
AV100Mailbox: param. number
AV101Mailbox: param. value
BI0DI1
BI1DI2
BI2DI3
BI3DI4
BI4DI5
BI5DI6
BI6DI7
BI7DI8
BO0DO1
BO1DO2
BO2DO3
BO3DO4
BV0Reservado
BV1Reservado
BV2Fire mode
BV3Bypass
BV4Quick Stop
BV52nd Ramp
BV6Config. Mode
BV7Alarm
BV8Running
BV9Enabled
BV10Forward
BV11JOG
BV12Remote
BV13Subvoltage
BV14Reservado
BV15Fault
BV16Ramp Enable
BV17General Enable
BV18Run Forward
BV19JOG Enable
BV20Remote
BV212nd Ramp
BV22Quick Stop
BV23Fault Reset
BV29Intern PID
BV30Extern PID 1
BV31Extern PID 2
BV100Mailbox: exec. read
BV101Mailbox: exec. write

Integration notes

Reserved status-word bits are listed as printed (no state or access given).
BI 0-7 are DI1-DI8 and BO 0-3 are DO1-DO4, as printed.
AV 11 Speed in 13 bits and AV 12 Serial/USB Speed Ref. use a 13-bit scale: 8192 = motor rated frequency.
Mailbox: write the parameter number to AV 100, then 1 to BV 100 to read it into AV 101, or set AV 101 and write 1 to BV 101.

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 CFW300 (BACnet MS/TP) 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 WEG CFW300 (BACnet MS/TP)

How many BACnet points does the WEG CFW300 (BACnet MS/TP) have?

This list has 60 BACnet objects: 2 analog inputs, 2 analog outputs, 15 analog values, 8 binary inputs, 4 binary outputs, 29 binary values. The exact set on a given unit depends on its firmware, installed options and configuration.

Which WEG CFW300 (BACnet MS/TP) BACnet points are writable?

24 of the 60 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 WEG CFW300 (BACnet MS/TP) BACnet documentation?

The source is BACnet CFW300 User's Manual (10006901889 / 00), revision 2020-01, published free by WEG at https://static.weg.net/medias/downloadcenter/hac/h27/WEG-CFW300-bacnet-user-manual-10006901889-en.pdf.

What are the minimum BACnet points to integrate the WEG CFW300 (BACnet MS/TP)?

Start with BV 16 Ramp Enable (Start/stop from the BMS (1 = run)); BV 17 General Enable (General enable; must be on to run); BV 20 Remote (Remote mode when P0220 selects serial); AV 12 Serial/USB Speed Ref. (Speed reference, 8192 = rated frequency); BV 23 Fault Reset (Reset a tripped drive); BV 8 Running (Running status); AV 3 Motor Frequency (Output frequency in Hz); AV 1 Motor Current (Motor amps); BV 15 Fault (Any active drive fault); AV 8 Present Fault (Active fault number).

How do I enable BMS control of the WEG CFW300 (BACnet MS/TP)?

Does the WEG CFW300 (BACnet MS/TP) need a BACnet heartbeat or have a communication timeout?

How do I check these points on the real CFW300 (BACnet MS/TP)?

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 WEG BACnet points lists

Source: BACnet CFW300 User's Manual · 10006901889 / 00 · rev. 2020-01. Object names, instances and units are reproduced as published; descriptions are our own.