'Mismatch Analyzer' tab (EtherCAT Master Online Functions)
The following information refers to a specific, typical device type. It shows an example of a network mismatch. Your screen may differ.
This help topic describes the 'Mismatch Analyzer' editor of the EtherCAT 'Online Functions'. In the 'Online Functions' editor, select the EtherCAT master in the tree on the left and click the 'Mismatch Analyzer' tab on top of the editor on the right. This editor tab is not available for EtherCAT slaves.
If the connected (scanned) network differs from the EtherCAT configuration last written to the controller (EtherCAT Master), a corresponding message appears as desktop notification in PLCnext Engineer when opening the 'Online Function' editor via the EtherCAT master node.
In this context, it is important to understand that the scanned network is compared with the configuration loaded in the EtherCAT Master and not with the configuration loaded in PLCnext Engineer.
In this case, the 'Mismatch Analyzer' displays the relevant problem stations in the network in red. In the tree on the left, differing slave devices are marked with a corresponding icon.
Mismatches can occur if, for example, configured slaves are missing in the network or if the expected order of the slaves or the slave identification does not match. In this context, it is important whether Hot Connect is configured ('Create HC Group for Slave' checkbox in the 'Settings' of the EtherCAT master) and which identification mode is set for each slave ('Settings' of the slave device). Please refer to the topic "Identification and HotConnect of Slaves" for more information.
To model the topology detected in the network in the engineering project, you can perform an EtherCAT Bus Scan (context menu command on the EtherCAT master node in the PLANT).
Note that even after the EtherCAT bus scan, slave stations remain marked red in the device tree of the Online Functions and in the 'Mismatch Analyzer' if the corresponding device libraries are missing in your project.
Alternatively, you can also insert the devices via the station editors, using the device list in the 'Mismatch Analyzer' as a guide.