powercom - Man Page

UPS driver for serial Powercom/Trust/Advice UPS equipment

Synopsis

powercom -h

powercom -a UPS_NAME [OPTIONS]

Note

This man page only documents the hardware-specific features of the powercom driver​. For information about the core driver, see nutupsdrv(8)​.

Supported Hardware

This driver supports many similar kinds of serial UPS hardware (as well as a few USB UPS models with USB-to-serial adapters)​. The most common ones are the Trust 425/625, Powercom, and Advice Partner/King PR750​. Others using the same protocol may also work​. For USB connections, you might need usbhid-ups(8)​.

For more specific guidance on which driver is applicable for a USB connection, see the NUT Hardware Compatibility List (HCL)​.

Extra Arguments

This driver supports the following optional settings in the ups.conf(5) file:

linevoltage=value

An integer specifying the line voltage​. It can’t be auto detected​. Acceptable values are in the range of 110-120 or 220-240​. The default is 230​.

manufacturer=name

Specify the manufacturer name, which also can’t be auto detected​. This is a user defined string, so any name is acceptable​. The default is PowerCom​.

modelname=name

Specify the model name, which also can’t be auto detected​. This is a user defined string, so any name is acceptable​. The default is Unknown​.

serialnumber=value

Like modelname above, but for the serial number​. The default is Unknown​.

type=name

The exact type of the communication protocol within the powercom family, that will be used to communicate with the UPS​. The type is named after the first modelname that was coded with that protocol​. The acceptable names are Trust, Egys, Kp625ap, Imp, Kin, BNT, BNT-other and Opti​. The default is Trust​.

BNT-other is a special type for other BNT models (such as the 1500A at 120V and can be used to override ALL models using ALL of the following values​.

shutdownArguments={{minutes,seconds},whether_minutes_should_be_used}

The minutes and seconds that the UPS should wait between receiving the shutdown command and actually shutting off​. The other argument should be set to the character n only when the minutes value should be skipped and not sent to the UPS​. The default is type-dependent and is given below​. The braces and commas are mandatory​. Note that there should be no whitespace characters​.

numOfBytesFromUPS=value

The number of bytes in a UPS frame: 16 is common, 11 for Trust​. The default is type-dependent and is given below​.

methodOfFlowControl=name

The method of serial communication flow control that is engaged by the UPS​. The default is type-dependent and is given below​. Acceptable names are dtr0rts1, dtr1 or no_flow_control​.

validationSequence={{index1,value1},{index2,value2},{index3,value3}}

(Only for types Kp625ap, Trust, Egys​.) 3 pairs to be used for validating the UPS by comparing bytes of the raw data with constant values​. The index selects the byte from the UPS (see numOfBytesFromUPS) and the value is for matching to the byte​. The default is type-dependent and is given below​. The braces and commas are mandatory, as the lack of white space characters​.

frequency={A,B}

(Only for types Kp625ap, Trust, Egys​.) A pair to convert the raw frequency data to a human-readable frequency reading using the function 1/(A*x+B)​. If the raw value x IS the frequency, then set A=1/(x^2) and B=0​. The default is type-dependent and is given below​. Do note that the braces and commas are mandatory as well, as the lack of whitespace characters​.

loadPercentage={BatteryA,BatteryB,LineA,LineB}

(Only for types Kp625ap, Trust, Egys​.) A quad to convert the raw load data to human readable load percentage reading using the function A*x+B​. If the raw value x IS the Load Percent, then set A=1 and B=0​. The default is type-dependent and is given below​. Do note that the braces and commas are mandatory, as the lack of white space characters​.

batteryPercentage={Battery1,Battery2,Battery3,Line4,Line5}

(Only for Kp625ap, Trust, Egys​.) A 5 tuple to convert the raw battery and line data to a human-readable battery and line percentage reading using the functions (Battery) A*x+B*y+C and (Line) D*x+E​. If the raw value x IS the Battery Percent, then set A=1, B=0, C=0, D=1, E=0​. The default is type-dependent and is given below​. Do note that the braces and commas are mandatory, as the lack of white space characters​.

voltage={240A,240B,120A,120B}

(Only for types Kp625ap, Trust, Egys​.) A quad that is used convert the raw voltage data to a human-readable voltage reading using the function A*x+B​. If the raw value x IS HALF the Voltage, then set A=2, B=0​. The default is type-dependent and is given below​. Do note that the braces and commas are mandatory, as well as the lack of whitespace characters​.

nobt

If this flag is present, the battery check on startup is skipped​. This is useful for systems that tend to overload the UPS when testing the battery on system startup — just when the power consumption tends to be high​.

Default Values for the Extra Arguments

linevoltage = 230
manufacturer = PowerCom
modelname = Unknown
serialnumber = Unknown
type = Trust

The rest of the default values for the extra arguments are type-dependent​. However, BNT-other is a special type that can be used to override ALL values for ALL models​.

Trust

numOfBytesFromUPS = 11
methodOfFlowControl = dtr0rts1
validationSequence = {{5,0},{7,0},{8,0}}
shutdownArguments = {{0,10},n}
frequency = {0​.00020997,0​.00020928}
loadPercentage = {6​.1343,-0​.3808,4​.3110,0​.1811}
batteryPercentage = {5​.0000,0​.3268,-825​.00,4​.5639,-835​.82}
voltage = {1​.9216,-0​.0977,0​.9545,0​.0000}

Kp625ap

numOfBytesFromUPS = 16
methodOfFlowControl = dtr0rts1
validationSequence = {{5,0x80},{7,0},{8,0}}
shutdownArguments = {{0,10},n}
frequency = {0​.00020997,0​.00020928}
loadPercentage = {6​.1343,-0​.3808,4​.3110,0​.1811}
batteryPercentage = {5​.0000,0​.3268,-825​.00,4​.5639,-835​.82}
voltage = {1​.9216,-0​.0977,0​.9545,0​.0000}

Egys

numOfBytesFromUPS = 16
methodOfFlowControl = no_flow_control
validationSequence = {{5,0x80},{7,0},{8,0}}
shutdownArguments = {{0,10},n}
frequency = {0​.00020997,0​.00020928}
loadPercentage = {6​.1343,-0​.3808,1​.3333,0​.6667}
batteryPercentage = {5​.0000,0​.3268,-825​.00,2​.2105,-355​.37}
voltage = {1​.9216,-0​.0977,0​.9545,0​.0000}

Imp

numOfBytesFromUPS = 16
methodOfFlowControl = no_flow_control
validationSequence = {{5,0xFF},{7,0},{8,0}}
shutdownArguments = {{1,30},y}

Kin

numOfBytesFromUPS = 16
methodOfFlowControl = no_flow_control
validationSequence = {{11,0x4b},{8,0},{8,0}}
shutdownArguments = {{1,30},y}

BNT

numOfBytesFromUPS = 16
methodOfFlowControl = no_flow_control
validationSequence = {{11,0x42},{8,0},{8,0}}
shutdownArguments = {{1,30},y}

BNT-other

numOfBytesFromUPS = 16
methodOfFlowControl = no_flow_control
validationSequence = {{8,0},{8,0},{8,0}}
shutdownArguments = {{1,30},y}
frequency = {0​.00027778,0​.0000}
loadPercentage = {1​.0000,0​.0,1​.0000,0​.0}
batteryPercentage = {1​.0000,0​.0000,0​.0000,1​.0000,0​.0000}
voltage = {2​.0000,0​.0000,2​.0000,0​.0000}

Opti

numOfBytesFromUPS = 16
methodOfFlowControl = no_flow_control
validationSequence = {{5,0xFF},{7,0},{8,0}}
shutdownArguments = {{1,30},y}

Authors

See Also

The core driver

nutupsdrv(8)

Internet resources

The NUT (Network UPS Tools) home page: https://www​.networkupstools​.org/historic/v2​.8​.5/

Referenced By

nut(7), nutupsdrv(8), upsd(8).

08/25/2026 Network UPS Tools 2.8.5 NUT Manual