QModbusDeviceIdentification Class
The QModbusDeviceIdentification is a container class representing the physical and functional description of a Modbus server. More...
| Header: | #include <QModbusDeviceIdentification> |
| qmake: | QT += serialbus |
| Since: | Qt 5.8 |
Public Types
| enum | ConformityLevel { BasicConformityLevel, RegularConformityLevel, ExtendedConformityLevel, BasicIndividualConformityLevel, RegularIndividualConformityLevel, ExtendedIndividualConformityLevel } |
| enum | ObjectId { VendorNameObjectId, ProductCodeObjectId, MajorMinorRevisionObjectId, VendorUrlObjectId, ..., UndefinedObjectId } |
| enum | ReadDeviceIdCode { BasicReadDeviceIdCode, RegularReadDeviceIdCode, ExtendedReadDeviceIdCode, IndividualReadDeviceIdCode } |
Public Functions
| QModbusDeviceIdentification() | |
| QModbusDeviceIdentification::ConformityLevel | conformityLevel() const |
| bool | contains(uint objectId) const |
| bool | insert(uint objectId, const QByteArray &value) |
| bool | isValid() const |
| QList<int> | objectIds() const |
| void | remove(uint objectId) |
| void | setConformityLevel(QModbusDeviceIdentification::ConformityLevel level) |
| QByteArray | value(uint objectId) const |
Static Public Members
| QModbusDeviceIdentification | fromByteArray(const QByteArray &ba) |
Detailed Description
The QModbusDeviceIdentification is a container class representing the physical and functional description of a Modbus server.
The Device Identification interface is modeled as an address space composed of a set of addressable data elements. The data elements are called objects and an ObjectId identifies them.
Member Type Documentation
enum QModbusDeviceIdentification::ConformityLevel
Defines the identification conformity level of the device and type of supported access.
| Constant | Value | Description |
|---|---|---|
QModbusDeviceIdentification::BasicConformityLevel | 0x01 | Basic identification (stream access). |
QModbusDeviceIdentification::RegularConformityLevel | 0x02 | Regular identification (stream access). |
QModbusDeviceIdentification::ExtendedConformityLevel | 0x03 | Extended identification (stream access). |
QModbusDeviceIdentification::BasicIndividualConformityLevel | 0x81 | Basic identification (stream access and individual access). |
QModbusDeviceIdentification::RegularIndividualConformityLevel | 0x82 | Regular identification (stream access and individual access). |
QModbusDeviceIdentification::ExtendedIndividualConformityLevel | 0x83 | Extended identification (stream access and individual access). |
See also ReadDeviceIdCode.
enum QModbusDeviceIdentification::ObjectId
This enum describes the possible server objects. The interface consists of three categories of objects:
Basic Device Identification. All objects of this category are mandatory.
| Constant | Value | Description |
|---|---|---|
QModbusDeviceIdentification::VendorNameObjectId | 0x00 | The vendor name of the device. |
QModbusDeviceIdentification::ProductCodeObjectId | 0x01 | The product code of the device. |
QModbusDeviceIdentification::MajorMinorRevisionObjectId | 0x02 | The product version numbering. |
Regular Device Identification. All objects of this category are standard defined and optional.
| Constant | Value | Description |
|---|---|---|
QModbusDeviceIdentification::VendorUrlObjectId | 0x03 | The vendor URL of the device. |
QModbusDeviceIdentification::ProductNameObjectId | 0x04 | The product name of the device. |
QModbusDeviceIdentification::ModelNameObjectId | 0x05 | The model name of the device. |
QModbusDeviceIdentification::UserApplicationNameObjectId | 0x06 | The user application name of the device. |
Reserved range (i.e., ReservedObjectId >= ObjectId < ProductDependentObjectId). Do not use.
| Constant | Value | Description |
|---|---|---|
QModbusDeviceIdentification::ReservedObjectId | 0x07 | First value of reserved object Ids. |
Extended Device Identification. All of these data are device dependent and optional.
| Constant | Value | Description |
|---|---|---|
QModbusDeviceIdentification::ProductDependentObjectId | 0x80 | First possible value of product dependent identifiers. |
QModbusDeviceIdentification::UndefinedObjectId | 0x100 | Do not use. |
enum QModbusDeviceIdentification::ReadDeviceIdCode
Defines the access type of the read identification request.
Stream access:
| Constant | Value | Description |
|---|---|---|
QModbusDeviceIdentification::BasicReadDeviceIdCode | 0x01 | Request to get the basic device identification. |
QModbusDeviceIdentification::RegularReadDeviceIdCode | 0x02 | Request to get the regular device identification. |
QModbusDeviceIdentification::ExtendedReadDeviceIdCode | 0x03 | Request to get the extended device identification. |
Individual access:
| Constant | Value | Description |
|---|---|---|
QModbusDeviceIdentification::IndividualReadDeviceIdCode | 0x04 | Request to get one specific identification object. |
Member Function Documentation
QModbusDeviceIdentification::QModbusDeviceIdentification()
Constructs an invalid QModbusDeviceIdentification object.
QModbusDeviceIdentification::ConformityLevel QModbusDeviceIdentification::conformityLevel() const
Returns the identification conformity level of the device and type of supported access.
See also setConformityLevel().
bool QModbusDeviceIdentification::contains(uint objectId) const
Returns true if there is an item for the given objectId; otherwise false.
See also ObjectId.
[static] QModbusDeviceIdentification QModbusDeviceIdentification::fromByteArray(const QByteArray &ba)
Converts the byte array ba to a QModbusDeviceIdentification object.
Note: : The returned object might be empty or even invalid if some error occurs while processing the byte array.
See also isValid().
bool QModbusDeviceIdentification::insert(uint objectId, const QByteArray &value)
Inserts a new item with the objectId and a value of value. If there is already an item with the objectId, that item's value is replaced with value.
Returns true if the size of value is less than 245 bytes and the objectId is less then QModbusDeviceIdentification::UndefinedObjectId.
See also ObjectId.
bool QModbusDeviceIdentification::isValid() const
Returns true if the device identification object is valid; otherwise false.
A device identification object is considered valid if ProductNameObjectId, ProductCodeObjectId and MajorMinorRevisionObjectId are set to a non-empty value. Still the object can contain valid object id's and associated data.
Note: A default constructed device identification object is invalid.
QList<int> QModbusDeviceIdentification::objectIds() const
Returns a list containing all the object id's in the QModbusDeviceIdentification object in ascending order.
See also ObjectId.
void QModbusDeviceIdentification::remove(uint objectId)
Removes the item for the given objectId.
See also ObjectId.
void QModbusDeviceIdentification::setConformityLevel(QModbusDeviceIdentification::ConformityLevel level)
Sets the identification conformity level of the device and type of supported access to level.
See also conformityLevel().
QByteArray QModbusDeviceIdentification::value(uint objectId) const
Returns the value associated with the objectId. If there is no item with the objectId, the function returns a default-constructed value.
See also ObjectId.
© 2019 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.