CIM_Tachometer class

Article
01/06/2021

The CIM_Tachometer class exists for backward compatibility with earlier CIM schema definitions. With additions to the CIM_Sensor and CIM_NumericSensor classes in version 2.2, it is no longer necessary. A tachometer can be defined by setting the SensorType property, inherited from CIM_Sensor, to 5 ("Tachometer"). Other properties of this class are hard-coded to constant values that correspond to definitions in the sensor hierarchy.

Important

The DMTF (Distributed Management Task Force) CIM (Common Information Model) classes are the parent classes upon which WMI classes are built. WMI currently supports only the CIM 2.x version schemas.

The following syntax is simplified from Managed Object Format (MOF) code and includes all of its inherited properties. Properties are listed in alphabetic order, not MOF order.

Syntax

[Abstract, UUID("{237D964F-E3D1-11d2-8601-0000F8102E5F}"), AMENDMENT]
class CIM_Tachometer : CIM_NumericSensor
{
  sint32   Accuracy;
  uint16   Availability;
  string   Caption;
  uint32   ConfigManagerErrorCode;
  boolean  ConfigManagerUserConfig;
  string   CreationClassName;
  sint32   CurrentReading;
  string   Description;
  string   DeviceID;
  boolean  ErrorCleared;
  string   ErrorDescription;
  datetime InstallDate;
  boolean  IsLinear;
  uint32   LastErrorCode;
  sint32   LowerThresholdCritical;
  sint32   LowerThresholdFatal;
  sint32   LowerThresholdNonCritical;
  sint32   MaxReadable;
  sint32   MinReadable;
  string   Name;
  sint32   NominalReading;
  sint32   NormalMax;
  sint32   NormalMin;
  string   PNPDeviceID;
  uint16   PowerManagementCapabilities[];
  boolean  PowerManagementSupported;
  uint32   Resolution;
  string   Status;
  uint16   StatusInfo;
  string   SystemCreationClassName;
  string   SystemName;
  sint32   Tolerance;
  sint32   UpperThresholdCritical;
  sint32   UpperThresholdFatal;
  sint32   UpperThresholdNonCritical;
};

Members

The CIM_Tachometer class has these types of members:

Methods
Properties

Methods

The CIM_Tachometer class has these methods.

Method	Description
Reset	Requests a reset of the logical device. Not implemented by WMI.
SetPowerState	Defines the desired power state for a logical device and when a device should be put into that state. Not implemented by WMI.

Properties

The CIM_Tachometer class has these properties.

Accuracy

Data type: sint32
Access type: Read-only
Qualifiers: Units ("hundredths of percent")

Accuracy of the sensor for the measured property. Its value is recorded as plus or minus hundredths of a percent. This property, and the Resolution and Tolerance properties, are used to calculate the actual value of the measured physical property. Accuracy can vary depending on whether the device is linear over its dynamic range.

This property is inherited from CIM_NumericSensor.

Availability

Data type: uint16
Access type: Read-only
Qualifiers: MappingStrings ("MIF.DMTF|Operational State|003.5", "MIB.IETF|HOST-RESOURCES-MIB.hrDeviceStatus")

Availability and status of the device.

This property is inherited from CIM_LogicalDevice.

Other (1)

Unknown (2)

Running/Full Power (3)

Running or Full Power

Warning (4)

In Test (5)

Not Applicable (6)

Power Off (7)

Off Line (8)

Off Duty (9)

Degraded (10)

Not Installed (11)

Install Error (12)

Power Save - Unknown (13)

The device is known to be in a power save mode, but its exact status is unknown.

Power Save - Low Power Mode (14)

The device is in a power save state but still functioning, and may exhibit degraded performance.

Power Save - Standby (15)

The device is not functioning but could be brought to full power quickly.

Power Cycle (16)

Power Save - Warning (17)

The device is in a warning state, though also in a power save mode.

Paused (18)

The device is paused.

Not Ready (19)

The device is not ready.

Not Configured (20)

The device is not configured.

Quiesced (21)

The device is quiet.

Caption

Data type: string
Access type: Read-only
Qualifiers: MaxLen (64), DisplayName ("Caption")

Short textual description of the object.

This property is inherited from CIM_ManagedSystemElement.

ConfigManagerErrorCode

Data type: uint32
Access type: Read-only
Qualifiers: Schema ("Win32")

Win32 Configuration Manager error code.

This property is inherited from CIM_LogicalDevice.

This device is working properly. (0)

Device is working properly.

This device is not configured correctly. (1)

Device is not configured correctly.

Windows cannot load the driver for this device. (2)

The driver for this device might be corrupted, or your system may be running low on memory or other resources. (3)

Driver for this device might be corrupted, or the system may be low on memory or other resources.

This device is not working properly. One of its drivers or your registry might be corrupted. (4)

Device is not working properly. One of its drivers or the registry might be corrupted.

The driver for this device needs a resource that Windows cannot manage. (5)

Driver for the device requires a resource that Windows cannot manage.

The boot configuration for this device conflicts with other devices. (6)

Boot configuration for the device conflicts with other devices.

Cannot filter. (7)

The driver loader for the device is missing. (8)

Driver loader for the device is missing.

This device is not working properly because the controlling firmware is reporting the resources for the device incorrectly. (9)

Device is not working properly. The controlling firmware is incorrectly reporting the resources for the device.

This device cannot start. (10)

Device cannot start.

This device failed. (11)

Device failed.

This device cannot find enough free resources that it can use. (12)

Device cannot find enough free resources to use.

Windows cannot verify this device's resources. (13)

Windows cannot verify the device's resources.

This device cannot work properly until you restart your computer. (14)

Device cannot work properly until the computer is restarted.

This device is not working properly because there is probably a re-enumeration problem. (15)

Device is not working properly due to a possible re-enumeration problem.

Windows cannot identify all the resources this device uses. (16)

Windows cannot identify all of the resources that the device uses.

This device is asking for an unknown resource type. (17)

Device is requesting an unknown resource type.

Reinstall the drivers for this device. (18)

Device drivers must be reinstalled.

Failure using the VxD loader. (19)

Your registry might be corrupted. (20)

Registry might be corrupted.

System failure: Try changing the driver for this device. If that does not work, see your hardware documentation. Windows is removing this device. (21)

System failure. If changing the device driver is ineffective, see the hardware documentation. Windows is removing the device.

This device is disabled. (22)

Device is disabled.

System failure: Try changing the driver for this device. If that doesn't work, see your hardware documentation. (23)

System failure. If changing the device driver is ineffective, see the hardware documentation.

This device is not present, is not working properly, or does not have all its drivers installed. (24)

Device is not present, not working properly, or does not have all of its drivers installed.

Windows is still setting up this device. (25)

Windows is still setting up the device.

Windows is still setting up this device. (26)

Windows is still setting up the device.

This device does not have valid log configuration. (27)

Device does not have valid log configuration.

The drivers for this device are not installed. (28)

Device drivers are not installed.

This device is disabled because the firmware of the device did not give it the required resources. (29)

Device is disabled. The device firmware did not provide the required resources.

This device is using an Interrupt Request (IRQ) resource that another device is using. (30)

Device is using an IRQ resource that another device is using.

This device is not working properly because Windows cannot load the drivers required for this device. (31)

Device is not working properly. Windows cannot load the required device drivers.

ConfigManagerUserConfig

Data type: boolean
Access type: Read-only
Qualifiers: Schema ("Win32")

If TRUE, the device is using a user-defined configuration.

This property is inherited from CIM_LogicalDevice.

CreationClassName

Data type: string
Access type: Read-only
Qualifiers: CIM_Key

Name of the class or subclass used in the creation of an instance. When used with other key properties of the class, this property allows all instances of the class and its subclasses to be uniquely identified.

This property is inherited from CIM_LogicalDevice.

CurrentReading

Data type: sint32
Access type: Read-only
Qualifiers: Override ("CurrentReading"), Units ("revolutions per minute")

Current value indicated by the sensor.

This property is inherited from CIM_NumericSensor.

Description

Data type: string
Access type: Read-only
Qualifiers: DisplayName ("Description")

Textual description of the object.

This property is inherited from CIM_ManagedSystemElement.

DeviceID

Data type: string
Access type: Read-only
Qualifiers: CIM_Key

Address or other identifying information to uniquely name the logical device.

This property is inherited from CIM_LogicalDevice.

ErrorCleared

Data type: boolean
Access type: Read-only

If TRUE, the error reported in the LastErrorCode property is now cleared.

This property is inherited from CIM_LogicalDevice.

ErrorDescription

Data type: string
Access type: Read-only

Free-form string that supplies information about the error recorded in the LastErrorCode property and corrective actions to perform.

This property is inherited from CIM_LogicalDevice.

InstallDate

Data type: datetime
Access type: Read-only
Qualifiers: MappingStrings ("MIF.DMTF|ComponentID|001.5"), DisplayName ("Install Date")

Date and time the object was installed. This property does not need a value to indicate that the object is installed.

This property is inherited from CIM_ManagedSystemElement.

IsLinear

Data type: boolean
Access type: Read-only

If TRUE, the sensor is linear over its dynamic range.

This property is inherited from CIM_NumericSensor.

LastErrorCode

Data type: uint32
Access type: Read-only

Last error code reported by the logical device.

This property is inherited from CIM_LogicalDevice.

LowerThresholdCritical

Data type: sint32
Access type: Read-only
Qualifiers: Override ("LowerThresholdCritical"), Units ("revolutions per minute")

This property is inherited from CIM_NumericSensor.

LowerThresholdFatal

Data type: sint32
Access type: Read-only
Qualifiers: Override ("LowerThresholdFatal"), Units ("revolutions per minute")

This property is inherited from CIM_NumericSensor.

LowerThresholdNonCritical

Data type: sint32
Access type: Read-only
Qualifiers: Override ("LowerThresholdNonCritical"), Units ("revolutions per minute")

Threshold value that specifies the ranges (minimum and maximum values) for determining whether the sensor is operating under normal, non-critical, critical, or fatal conditions. If the CurrentReading property is between LowerThresholdNonCritical and UpperThresholdNonCritical, then the sensor is reporting a normal value. If the CurrentReading property is between LowerThresholdNonCritical and LowerThresholdCritical, then the current state is non-critical.

This property is inherited from CIM_NumericSensor.

MaxReadable

Data type: sint32
Access type: Read-only
Qualifiers: Override ("MaxReadable"), Units ("revolutions per minute")

Largest value of the measured property that can be read by the numeric sensor.

This property is inherited from CIM_NumericSensor.

MinReadable

Data type: sint32
Access type: Read-only
Qualifiers: Override ("MinReadable"), Units ("revolutions per minute")

Smallest value of the measured property that can be read by the numeric sensor.

This property is inherited from CIM_NumericSensor.

Name

Data type: string
Access type: Read-only
Qualifiers: DisplayName ("Name")

Label by which the object is known. When subclassed, this property can be overridden to be a key property.

This property is inherited from CIM_ManagedSystemElement.

NominalReading

Data type: sint32
Access type: Read-only
Qualifiers: Override ("NominalReading"), Units ("revolutions per minute")

Expected or normal value for the numeric sensor.

This property is inherited from CIM_NumericSensor.

NormalMax

Data type: sint32
Access type: Read-only
Qualifiers: Override ("NormalMax"), Units ("revolutions per minute")

Normal maximum range for the numeric sensor.

This property is inherited from CIM_NumericSensor.

NormalMin

Data type: sint32
Access type: Read-only
Qualifiers: Override ("NormalMin"), Units ("revolutions per minute")

Normal minimum range for the numeric sensor.

This property is inherited from CIM_NumericSensor.

PNPDeviceID

Data type: string
Access type: Read-only
Qualifiers: Schema ("Win32")

Win32 Plug and Play device identifier of the logical device. This property is inherited from CIM_LogicalDevice.

Example: "*PNP030b"

PowerManagementCapabilities

Data type: uint16 array
Access type: Read-only

Array of the specific power-related capabilities of a logical device.

This property is inherited from CIM_LogicalDevice.

Unknown (0)

Not Supported (1)

Disabled (2)

Enabled (3)

The power management features are currently enabled but the exact feature set is unknown or the information is unavailable.

Power Saving Modes Entered Automatically (4)

The device can change its power state based on usage or other criteria.

Power State Settable (5)

The SetPowerState method is supported. This method is found on the parent CIM_LogicalDevice class and can be implemented. For more information, see Designing Managed Object Format (MOF) Classes.

Power Cycling Supported (6)

The SetPowerState method can be invoked with the PowerState parameter set to 5 (Power Cycle).

Timed Power On Supported (7)

The SetPowerState method can be invoked with the PowerState parameter set to 5 (Power Cycle) and Time set to a specific date and time, or interval, for power-on.

PowerManagementSupported

Data type: boolean
Access type: Read-only

If TRUE, the device can be power managed, that is, put into a power-save state. If FALSE, the integer value 1 ("Not Supported") should be the only entry in the PowerManagementCapabilities array.

This property does not indicate whether power management features are currently enabled, or if enabled, which features are supported. For more information, see the PowerManagementCapabilities array. This property is inherited from CIM_LogicalDevice.

Resolution

Data type: uint32
Access type: Read-only
Qualifiers: Override ("Resolution"), Units ("tenths of revolutions per minute")

Ability of the sensor to resolve differences in the measured property. This value can vary depending on whether the device is linear over its dynamic range.

This property is inherited from CIM_NumericSensor.

Status

Data type: string
Access type: Read-only
Qualifiers: MaxLen (10), DisplayName ("Status")

Current status of the object. This property is inherited from CIM_ManagedSystemElement.

Values include the following:

OK ("OK")

Error ("Error")

Degraded ("Degraded")

Unknown ("Unknown")

Pred Fail ("Pred Fail")

Starting ("Starting")

Stopping ("Stopping")

Service ("Service")

Stressed ("Stressed")

NonRecover ("NonRecover")

No Contact ("No Contact")

Lost Comm ("Lost Comm")

StatusInfo

Data type: uint16
Access type: Read-only
Qualifiers: MappingStrings ("MIF.DMTF|Operational State|003.3")

State of the logical device. If this property does not apply to the logical device, the value 5 (Not Applicable) should be used.

This property is inherited from CIM_LogicalDevice.

Other (1)

Unknown (2)

Enabled (3)

Disabled (4)

Not Applicable (5)

SystemCreationClassName

Data type: string
Access type: Read-only
Qualifiers: Propagated ("CIM_System.CreationClassName"), CIM_Key

Scoping system's creation class name.

This property is inherited from CIM_LogicalDevice.

SystemName

Data type: string
Access type: Read-only
Qualifiers: Propagated ("CIM_System.Name"), CIM_Key

Scoping system's name.

This property is inherited from CIM_LogicalDevice.

Tolerance

Data type: sint32
Access type: Read-only
Qualifiers: Override ("Tolerance"), Units ("revolutions per minute")

Tolerance of the sensor for the measured property. This property, and the Resolution and Accuracy properties, are used to calculate the actual value of the measured physical property. Tolerance can vary depending on whether the device is linear over its dynamic range.

This property is inherited from CIM_NumericSensor.

UpperThresholdCritical

Data type: sint32
Access type: Read-only
Qualifiers: Override ("UpperThresholdCritical"), Units ("revolutions per minute")

This property is inherited from CIM_NumericSensor.

UpperThresholdFatal

Data type: sint32
Access type: Read-only
Qualifiers: Override ("UpperThresholdFatal"), Units ("revolutions per minute")

This property is inherited from CIM_NumericSensor.

UpperThresholdNonCritical

Data type: sint32
Access type: Read-only
Qualifiers: Override ("UpperThresholdNonCritical"), Units ("revolutions per minute")

Threshold value that specifies the ranges (minimum and maximum values) for determining whether the sensor is operating under normal, non-critical, critical, or fatal conditions. If the CurrentReading property is between LowerThresholdNonCritical and UpperThresholdNonCritical, then the sensor is reporting a normal value. If the CurrentReading property is between UpperThresholdNonCritical and UpperThresholdCritical, then the current state is non-critical.

This property is inherited from CIM_NumericSensor.

Remarks

The CIM_Tachometer class is derived from CIM_NumericSensor.

WMI does not implement this class.

This documentation is derived from the CIM class descriptions published by the DMTF. Microsoft may have made changes to correct minor errors, conform to Microsoft SDK documentation standards, or provide more information.

Requirements

Requirement	Value
Minimum supported client	Windows Vista
Minimum supported server	Windows Server 2008
Namespace	Root\CIMV2
MOF	CIMWin32.mof
DLL	CIMWin32.dll

CIM_Tachometer class

Syntax

Members

Methods

Properties

Remarks

Requirements

See also

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Additional resources