The GearType describes a gear in a power train, e.g. a gear box or a spindle. It is formally defined in Table 27.
Table 27 – GearType Definition
|
Attribute |
Value |
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|
BrowseName |
GearType |
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|
IsAbstract |
False |
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|
References |
Node Class |
BrowseName |
DataType |
TypeDefinition |
Modelling Rule |
|
Subtype of the ComponentType defined in OPC Unified Architecture for Devices (DI) |
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|
HasProperty |
Variable |
2:SerialNumber |
String |
PropertyType |
Mandatory |
|
HasProperty |
Variable |
2:Manufacturer |
LocalizedText |
PropertyType |
Mandatory |
|
HasProperty |
Variable |
2:Model |
LocalizedText |
PropertyType |
Mandatory |
|
HasProperty |
Variable |
2:ProductCode |
String |
PropertyType |
Mandatory |
|
HasComponent |
Variable |
GearRatio |
RationalNumber |
RationalNumberType |
Mandatory |
|
HasComponent |
Variable |
Pitch |
Double |
BaseDataVariableType |
Optional |
|
IsConnectedTo |
Object |
<MotorIdentifier> |
|
MotorType |
OptionalPlaceholder |
|
The following instance declarations are not defined by this type, but by the supertype ComponentType and repeated here for better readability |
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|
HasProperty |
Variable |
2:AssetId |
String |
PropertyType |
Optional |
In case of a one to one relation between powertrains and axes, gear ratio and pitch may reflect the relation between motor and axis velocities. This is not possible when axis coupling is involved because different ratios for all motor-axis combinations may be needed. Additionally, there could be a nonlinear coupling between the load side of the gear box and the axis. Thus GearRatio and Pitch only reflect the properties of the physical gear box and it may not be possible to use these values to transform between axis and motor movements.
The SerialNumber property is a unique production number assigned by the manufacturer of the device. This is often stamped on the outside of the device and may be used for traceability and warranty purposes. This property is derived from ComponentType defined in OPC UA DI.
The Manufacturer property provides the name of the company that manufactured the device. This property is derived from ComponentType defined in OPC UA DI.
The Model property provides the name of the product. This property is derived from ComponentType defined in OPC UA DI.
The ProductCode property provides a unique combination of numbers and letters used to identify the product. It may be the order information displayed on type shields or in ERP systems. This property is derived from ComponentType defined in OPC UA DI.
The AssetId property is a user writable alphanumeric character sequence uniquely identifying a component. The ID is provided by the vendor, integrator or user of the device. It contains typically an identifier in a branch, use case or user specific naming scheme.
This could be for example a reference to an electric scheme. For electric schemes typically EN 81346-2 is used.
An use case could be to build up a location oriented view in a spare part management client software. It enables to identify parts with the same article number which is not possible if this entry is not used. This property is defined by ComponentType defined in OPC UA DI.
GearRatio is the transmission ratio of the gear expressed as a fraction as input velocity (motor side) by output velocity (load side).
RationalNumberType and RationalNumber are defined in the OPC 10001-11 (SpatialTypes).
Pitch describes the distance covered in millimeters (mm) for linear motion per one revolution of the output side of the driving unit. Pitch is used in combination with GearRatio to describe the overall transmission from input to output of the gear.
Calculation formula:
IsConnectedTo is a reference to provide the relationship between a motor and a gear of a power train.