Beckhoff EP3356-0022 Documentation page 55

The connected EtherCAT Box (EP6224-3022) is displayed in the TwinCAT tree, as shown in the following
illustration.
Fig. 50: Master display after "Scan for boxes"
Troubleshooting
Various effects may occur during scanning.
• An unknown device is detected, i.e. an EtherCAT device for which no ESI XML description is
available.
In this case the System Manager offers to read any ESI that may be stored in the device.
• Device are not detected properly
Possible reasons include
- faulty data links, resulting in data loss during the scan
- the device has an invalid device description
The connections and devices should be checked in a targeted manner, e.g. via the emergency scan.
Then re-run the scan.
Scan over existing Configuration
If a scan is initiated for an existing configuration, the actual I/O environment may match the configuration
exactly or it may differ. This enables the configuration to be compared.
Fig. 51: Identical configuration
If differences are detected, they are shown in the correction dialog, so that the user can modify the
configuration as required.
EP3356-0022 Version: 1.1.0
Commissioning/Configuration
55