Definition: Communication channel (OPC UA)

Parameter name	Description of the
Do not use registered nodes when registering monitored items in subscriptions	Specifies that the original ID is used when registering the variables in the OPC UA server.
When reading and writing variables, use the canonical node ID instead of a registered one	Specifies that the OPC UA server uses the canonical NodeID instead of the registered one.
Descriptionof the	Specifies a descriptive text for the communication component.
Browser	Defines the component for transferring variable information.
Browser structure prefix	Defines a prefix for structures.
Browser properties	Defines the settings for the browser.
Single access when writing to field elements using 'IndexRange'	Determines whether individual field elements may be written to the controller.
Individual access to structure elements when writing	Determines whether individual structural elements may be written to the controller.
Automate individual access to structural elements	Determines whether all structure elements are checked for their individual access options when the system is started.
Determine encoding of structures at system startup
Filter for messages for diagnostics (message surge)	Defines whether and which error messages from the OPC UA server should be filtered out (not reported).
Request halved group sampling rate for variables by the OPC server	Specifies that the OPC UA server updates the variables internally twice as fast as set in the sampling time of the group.
Comment	Optional commentary on the object.
Active communication	Activates communication with the PLC.
Communication does not start when the variable server boots up	Suspends communication via the channel until it is reactivated.
Allow compatible structural extensions	Enables the communication of variables without error messages despite certain deviations in the structures between VisiWin and the PLC.
Repeat reading in the event of a reading/writing conflict	Protects against data loss in the event of a read/write conflict in the variable server.
Name	Name of the object.
Reconnect variables that are not yet available after the initialisation phase	Specifies that the variable server should cyclically attempt to re-register the variables that could not be registered in the OPC/OPC UA server during the connection phase.
OPC server name	Registered name of the OPC server.
Separator	Separator for the namespaces in the variable editor
Security	Security settings for the connection and communication between the variable server and UA server.
Standard access path	Optional: Defines the access path (namespace) for the variables in the communication channel.
Start values not read in synchronously	Optional optimisation when starting the project
Structure access	Decides how process variables of the data type of a structure are to be accessed.
URL	Connection endpoint of the OPC UA server
Variables when deactivating read more	Specifies that variables that are no longer required by the application and are therefore cancelled in the variable server are still requested from the communication component.
Activate variables statically	Determines the data exchange between the variable server and OPC server.
Do not accept variable values for OPC Quality BAD	Defines which value is written to the variable server when a variable is transferred from the OPC server whose quality flag is not "QUALITY_GOOD".
Repeat connection attempts after initialisation phase	Defines whether an attempt is still made to establish a connection to the OPC/OPC UA server after the initialisation phase.
Value update when the timestamp is changed	Specifies that the OPC UA server sends values to the client (VisiWin runtime) with every cycle set for the communication group, even without changing them.

Do not use registered nodes when registering monitored items in subscriptions

Specifies that the original ID is used when registering the variables in the OPC UA server.

When reading and writing variables, use the canonical node ID instead of a registered one

Specifies that the OPC UA server uses the canonical NodeID instead of the registered one.

Descriptionof the

Specifies a descriptive text for the communication component.

Browser

Defines the component for transferring variable information.

Browser structure prefix

Defines a prefix for structures.

Browser properties

Defines the settings for the browser.

Single access when writing to field elements using 'IndexRange'

Determines whether individual field elements may be written to the controller.

Individual access to structure elements when writing

Determines whether individual structural elements may be written to the controller.

Automate individual access to structural elements

Determines whether all structure elements are checked for their individual access options when the system is started.

Determine encoding of structures at system startup

Filter for messages for diagnostics (message surge)

Defines whether and which error messages from the OPC UA server should be filtered out (not reported).

Request halved group sampling rate for variables by the OPC server

Specifies that the OPC UA server updates the variables internally twice as fast as set in the sampling time of the group.

Comment

Optional commentary on the object.

Active communication

Activates communication with the PLC.

Communication does not start when the variable server boots up

Suspends communication via the channel until it is reactivated.

Allow compatible structural extensions

Enables the communication of variables without error messages despite certain deviations in the structures between VisiWin and the PLC.

Repeat reading in the event of a reading/writing conflict

Protects against data loss in the event of a read/write conflict in the variable server.

Name

Name of the object.

Reconnect variables that are not yet available after the initialisation phase

Specifies that the variable server should cyclically attempt to re-register the variables that could not be registered in the OPC/OPC UA server during the connection phase.

OPC server name

Registered name of the OPC server.

Separator

Separator for the namespaces in the variable editor

Security

Security settings for the connection and communication between the variable server and UA server.

Standard access path

Optional: Defines the access path (namespace) for the variables in the communication channel.

Start values not read in synchronously

Optional optimisation when starting the project

Structure access

Decides how process variables of the data type of a structure are to be accessed.

URL

Connection endpoint of the OPC UA server

Variables when deactivating read more

Specifies that variables that are no longer required by the application and are therefore cancelled in the variable server are still requested from the communication component.

Activate variables statically

Determines the data exchange between the variable server and OPC server.

Do not accept variable values for OPC Quality BAD

Defines which value is written to the variable server when a variable is transferred from the OPC server whose quality flag is not "QUALITY_GOOD".

Repeat connection attempts after initialisation phase

Defines whether an attempt is still made to establish a connection to the OPC/OPC UA server after the initialisation phase.

Value update when the timestamp is changed

Specifies that the OPC UA server sends values to the client (VisiWin runtime) with every cycle set for the communication group, even without changing them.