Synchronisation of the device configuration and parameterisation

Before the plug-in is connected to a remote I/O system CPX-AP, the topology of the target system is compared with the topology of the configured system in the project.

Topology comparison

If the topology matches, the connection can be established with all modules of the target system. For this, all modules of the target system must also be present in the topology editor and connected to the same modules.

If the topology does not match, a connection can only be established with the modules that are correctly positioned in the project's topology. A dialogue that displays the differences in the topology opens and enables the following actions:

Tab. 8: Possible actions in the event of a topology mismatch
Possible actions	Function
‘Ok’	The connection with the correctly positioned modules is established. A connection cannot be established with modules that are not configured in the correct position. As long as the AP Master's plug-in instance is connected to the system, the buttons ‘Connect’ of these plug-in instances remain disabled. A corresponding error status is displayed for these modules in the connection control and in the topology editor.
‘Cancel’	The dialogue is terminated without any further action. A connection is not established.

The remote I/O system CPX-AP can be fully integrated into the project with the device scan. This only requires adding the bus interface with all subordinate modules to the project via the device scan.

Parameter comparison

Before the connection is established, a check is performed to determine whether the writable parameter values of the target system match the parameter values of the configured system. If writable parameter values differ, the differences are displayed in a dialogue. The following actions are then possible:

Tab. 9: Possible actions if the parameter values do not match
Possible actions	Function
‘Write To Device’ (default)	The connection to the system is established. Parameterisation is transferred from the project to the system.
‘Read From Device’	The connection to the system is established. The parameterisation is transferred from the system to the project.
‘Cancel’	The dialogue is terminated without any further action. A connection is not established.

The parameters are only compared for the CPX-AP modules open in the current session. The parameters of the plug-in instances that are not opened are not compared.

If a CPX-AP module of the connected CPX-AP network that has not yet been opened is opened in the current session, the dialogue window is displayed again for this plug-in instance for comparison with the parameters. After the comparison, the plug-in instance is also directly connected.

Parameter adjustment

After the parameter comparison, all parameters are automatically adjusted cyclically.