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Attributes

Object: Data Type

Key Attribute: Index

Attribute: Description

Attribute: Symbol Length

Attribute: Symbol

Index

Logical Address of the object. (The semantic of the indices is fixed).

Description

This attribute contains a textual description of the Data Type. It consists of

the Symbol Length and the Symbol.

Symbol Length

This attribute contains the length of the symbol. The value 0 means that no sym-

bol is used.

Symbol

This attribute contains a visible string of 0 to 32 octets as a symbolic de-

scription.

Structure of the OD on Transmission

The entry for a Data Type in the ST-OD has the structure below.

+-------+----------+-----------------------------+

! Index ! Object ! Description !

! ! code ! Symbol Length ! Symbol !

+-------+----------+---------------+-------------+

! 01 ! Data Type! 7 ! Boolean !

+-------+----------+---------------+-------------+

Figure 70. Object Description of Data Type in the ST-OD

Object Code

Tag for the Data Type Object, which is transmitted in addition to the object at-

tributes for the GetOD and the PutOD service.

Null Object <=> not configured.

EXAMPLE:

+-------+-------------+------------+

! Index ! Object ! Description!

! ! code ! !

+-------+-------------+------------+//

! 01 ! Data Type ! Boolean ! Boolean

+-------+-------------+------------+//

! 02 ! Null Object ! ! Integer8, not configured

+-------+-------------+------------+//

! 03 ! Data Type ! Integer16 ! Integer16

+-------+-------------+------------+//

...

+-------+-------------+------------+//

! 76 ! Data Type ! xy special ! Application specific

+-------+-------------+------------+//

Figure 71. Object Description of Data Types in the ST-OD (Example)

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4.7.2.7 The Data Type Structure Description Object

The Data Type Structure Description Object characterizes the size and the struc-

ture of records (see also Record Object).

The Object Description of the Data Type Structure Description Object has a fixed

configuration in the Static Type Dictionary. It contains a list of elements,

consisting of Data Type and Length of the corresponding record element. As Data

Types for the single elements only Data Types in the set of configured Data

Types of the Static Type Dictionary are allowed.

Services on the Data Type Structure Description Object:

- none

+----------------------------+ +--------------+

! Index i ------->! Data Type !

Index ! Data Type : ! +--------------+

------>! Structure : !

! Description : ! +--------------+

! Index n ------->! Data Type !

+----------------------------+ +--------------+

Figure 72. Overview of Data Type Structure Description

Attributes

Object: Data Type Structure Description

Key Attribute: Index

Attribute: Number Of Elements

Attribute: List of Element

Attribute: Data Type Index

Attribute: Length

Index

Logical Address of the object.

Number Of Elements

Number of elements of the structured Data Type.

List of Element

This attribute contains a list of elements, consisting of Data Type and Length

of the corresponding record element.

Data Type Index

Logical Address of the Data Type of element n.

Length

Length of the element n in octets.

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EXAMPLE:

Structure of the OD on Transmission

+-------+---------+------------+--------------+------------+//

! Index ! Object ! Number Of ! Data Type ! Length (1) !

! ! code ! Elements ! Index (1) ! !

+-------+---------+------------+--------------+------------+

! 39 ! Ds ! 5 ! 7 ! 4 !

+-------+---------+------------+--------------+------------+//

//+--------------+------------+--------------+------------+//

! Data Type ! Length (2) ! Data Type ! Length (3) !

! Index (2) ! ! Index (3) ! !

+--------------+------------+--------------+------------+

! 9 ! 12 ! 8 ! 4 !

//+--------------+------------+--------------+------------+//

! Data Type ! Length (4) ! Data Type ! Length (5) !

! Index (4) ! ! Index (5) ! !

+--------------+------------+--------------+------------+

! 9 ! 8 ! 8 ! 4 !

//+--------------+------------+--------------+------------+//

Figure 73. Object Description of Data Type Structure Description in the ST-OD

(Example)

Object Code

Tag for the Data Type Structure Description which is transmitted in addition to

the object attributes for the GetOD and the PutOD service.

4.7.3 Variable Access Services

4.7.3.1 Read

The values of Simple Variable Objects, Arrays and Records of the communication

partner may be read by using this service. Single elements of Arrays and Records

may be accessed with the subindex.

Table 45. Read

+---------------------------------+-----+-----+

! ! ! !

! Parameter Name !.req !.res !

! !.ind !.con !

+---------------------------------+-----+-----+

! Argument ! M ! !

! Access Specification ! M ! !

! Index ! S ! !

! Variable Name ! S ! !

! Variable List Name ! S ! !

! Subindex ! U ! !

! ! ! !

! Result(+) ! ! S !

! Data ! ! M !

! ! ! !

! Result(-) ! ! S !

! Error Type ! ! M !

+---------------------------------+-----+-----+

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Argument

The argument contains the service specific parameters of the service request.

Access Specification

This parameter states if the index or the name is used for addressing.

Index

Logical Address of the object.

Variable Name

This parameter is the name of the object.

Variable List Name

This parameter is the name of the Variable List Object.

Subindex

This parameter contains the logical sub-address of the object.

Result(+)

The Result(+) parameter shall indicate that the service was completed success-

fully.

Data

The data that has been read. The data of the object shall be mapped onto the pa-

rameter data according to the description of the Data Types in the coding chap-

ter.

Result(-)

The Result(-) shall indicate that the service request was not completed success-

fully.

Error Type

This parameter contains information about the reason why the service was not

completed successfully.

4.7.3.2 Write

Values are written in the objects Simple Variable, Array, Record and Variable

List with this service. Single elements of Arrays and Records may be accessed

with the subindex.

Table 46. Write

+---------------------------------+-----+-----+

! ! ! !

! Parameter Name !.req !.res !

! !.ind !.con !

+---------------------------------+-----+-----+

! Argument ! M ! !

! Access Specification ! M ! !

! Index ! S ! !

! Variable Name ! S ! !

! Variable List Name ! S ! !

! Subindex ! U ! !

! Data ! M ! !

! ! ! !

! Result(+) ! ! S !

! ! ! !

! Result(-) ! ! S !

! Error Type ! ! M !

+---------------------------------+-----+-----+

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Argument

The argument contains the service specific parameters of the service request.

Access Specification

This parameter states if the index or the name is used for addressing.

Index

Logical Address of the object.

Variable Name

This parameter is the name of the Variable Object.

Variable List Name

This parameter is the name of the Variable List Object.

Subindex

This parameter contains the logical sub-address of the object.

Data

The data that shall be written. The data of the object shall be mapped onto the

parameter data according to the description of the Data Types in the coding

chapter.

Result(+)

The Result(+) parameter shall indicate that the service was completed success-

fully.

Result(-)

The Result(-) shall indicate that the service request was not completed success-

fully.

Error Type

This parameter contains information about the reason why the service was not

completed successfully.

4.7.3.3 PhysRead

The value of a Physical Access Object of the communication partner is read using

this service.

Table 47. PhysRead

+---------------------------------+-----+-----+

! ! ! !

! Parameter Name !.req !.res !

! !.ind !.con !

+---------------------------------+-----+-----+

! Argument ! M ! !

! Local Address ! M ! !

! Length ! M ! !

! ! ! !

! Result(+) ! ! S !

! Data ! ! M !

! ! ! !

! Result(-) ! ! S !

! Error Type ! ! M !

+---------------------------------+-----+-----+

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Argument

The argument contains the service specific parameters of the service request.

Local Address

Physical Address of the object.

Length

Number of octets to be read.

Result(+)

The Result(+) parameter shall indicate that the service was completed success-

fully.

Data

The data that has been read.

Result(-)

The Result(-) shall indicate that the service request was not completed success-

fully.

Error Type

This parameter contains information about the reason why the service was not

completed successfully.

4.7.3.4 PhysWrite

A new value is assigned to a Physical Access Object using this service.

Table 48. PhysWrite

+---------------------------------+-----+-----+

! ! ! !

! Parameter Name !.req !.res !

! !.ind !.con !

+---------------------------------+-----+-----+

! Argument ! M ! !

! Local Address ! M ! !

! Data ! M ! !

! ! ! !

! Result(+) ! ! S !

! ! ! !

! Result(-) ! ! S !

! Error Type ! ! M !

+---------------------------------+-----+-----+

Argument

The argument contains the service specific parameters of the service request.

Local Address

Physical Address of the object.

Data

The data to be written.

Result(+)

The Result(+) parameter shall indicate that the service was completed success-

fully.

Result(-)

The Result(-) shall indicate that the service request was not completed success-

fully.

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Error Type

This parameter contains information about the reason why the service was not

completed successfully.

4.7.3.5 InformationReport

Values of the objects Simple Variable, Array, Record and Variable List are

transmitted by using the InformationReport service. The execution of this serv-

ice is not confirmed by the communication partner. Single elements of Arrays and

Records may be accessed with the subindex.

This service may be mapped in LLI to Layer 2 broadcast or multicast. Thus it is

possible to transmit values to all or to some stations in the network.

Table 49. InformationReport

+---------------------------------+-----+

! ! !

! Parameter Name !.req !

! !.ind !

+---------------------------------+-----+

! Argument ! M !

! Priority ! M !

! Access Specification ! M !

! Index ! S !

! Variable Name ! S !

! Variable List Name ! S !

! Subindex ! U !

! Data ! M !

+---------------------------------+-----+

Argument

The argument contains the service specific parameters of the service request.

Priority

This parameter indicates the priority for this service. It may have the values

true: high priority

false: low priority

Access Specification

This parameter states if the index or the name is used for addressing.

Index

Logical Address of the object in the Source OD.

Variable Name

This parameter is the name of the Variable Object.

Variable List Name

This parameter is the name of the Variable List Object.

Subindex

This parameter is the logical sub-address of the object.

Data

This parameter contains the data. The data of the object shall be mapped onto

the parameter data according to the description of the Data Types in the coding

chapter.

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4.7.3.6 DefineVariableList

A Variable List Object is created at the communication partner using this serv-

ice. The Number Of Elements attribute is calculated automatically by the server

for the DefineVariableList service. The client user shall ensure that the data

of the Variable List Service may be transmitted in one single PDU. The Deletable

attribute of a Variable List which is created by the DefineVariableList service

is set to the value true.

Table 50. DefineVariableList

+---------------------------------+-----+-----+

! ! ! !

! Parameter Name !.req !.res !

! !.ind !.con !

+---------------------------------+-----+-----+

! Argument ! M ! !

! Password ! M ! !

! Access Groups ! M ! !

! Access Rights ! M ! !

! List Of Variables ! M ! !

! Variable Index ! S ! !

! Variable Name ! S ! !

! Variable List Name ! U ! !

! Extension ! U ! !

! ! ! !

! Result(+) ! ! S !

! Index ! ! M !

! ! ! !

! Result(-) ! ! S !

! Error Type ! ! M !

+---------------------------------+-----+-----+

Argument

The argument contains the service specific parameters of the service request. If

Access Rights are not supported (Access Protection Supported = false), then the

parameters Password, Access Groups and Access Rights are insignificant.

Password

This parameter states to which value the attribute Password shall be set.

Access Groups

This parameter states to which value the attribute Access Groups shall be set.

Access Rights

This parameter states to which value the attribute Access Rights shall be set.

List of Variables

This parameter contains the addresses of the variables which are combined in

this Variable List. Each address may be a logical address or a name.

Variable Index

Index of a Variable.

Variable Name

Name of a Variable.

Variable List Name

This parameter states to which value the Name attribute of the Variable List Ob-

ject shall be set.

Extension

This parameter states to which value the Extension attribute of the Variable

List Object shall be set.

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Result(+)

The Result(+) parameter shall indicate that the service was completed success-

fully.

Index

Logical Address of the object.

Result(-)

The Result(-) shall indicate that the service request was not completed success-

fully.

Error Type

This parameter contains information about the reason why the service was not

completed successfully.

4.7.3.7 DeleteVariableList

A Variable List Object is deleted at the communication partner with this service

if there is an Access Right for this Object. Only Variable List objects having

the value true for the Deletable attribute may be deleted.

Table 51. DeleteVariableList

+---------------------------------+-----+-----+

! ! ! !

! Parameter Name !.req !.res !

! !.ind !.con !

+---------------------------------+-----+-----+

! Argument ! M ! !

! Access Specification ! M ! !

! Index ! S ! !

! Variable List Name ! S ! !

! ! ! !

! Result(+) ! ! S !

! ! ! !

! Result(-) ! ! S !

! Error Type ! ! M !

+---------------------------------+-----+-----+

Argument

The argument contains the service specific parameters of the service request.

Access Specification

This parameter states if the index or the name is used for addressing.

Index

Logical Address of the object.

Variable List Name

This parameter is the name of the Variable List Object.

Result(+)

The Result(+) parameter shall indicate that the service was completed success-

fully.

Result(-)

The Result(-) shall indicate that the service request was not completed success-

fully.

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Error Type

This parameter contains information about the reason why the service was not

completed successfully.

4.7.3.8 ReadWithType

The value and the Data Type Description of Simple Variable Objects, Arrays and

Records of the communication partner may be read using this service. Single ele-

ments of Arrays and Records may be accessed with the subindex.

Table 52. ReadWithType

+---------------------------------+-----+-----+

! ! ! !

! Parameter Name !.req !.res !

! !.ind !.con !

+---------------------------------+-----+-----+

! Argument ! M ! !

! Access Specification ! M ! !

! Index ! S ! !

! Variable Name ! S ! !

! Variable List Name ! S ! !

! Subindex ! U ! !

! ! ! !

! Result(+) ! ! S !

! Type Description ! ! M !

! Data ! ! M !

! ! ! !

! Result(-) ! ! S !

! Error Type ! ! M !

+---------------------------------+-----+-----+

Argument

The argument contains the service specific parameters of the service request.

Access Specification

This parameter states if the index or the name is used for addressing.

Index

Logical Address of the object.

Variable Name

This parameter is the name of the Variable Object.

Variable List Name

This parameter is the name of the Variable List Object.

Subindex

This parameter contains the logical sub-address of the object.

Result(+)

The Result(+) parameter shall indicate that the service was completed success-

fully.

Data

The data being read. The data of the object shall be mapped onto the parameter

data according to the description of the Data Types in the coding chapter.

Typedescription

This parameter contains the Data Type Description (see Parameter Type Descrip-

tion).

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