Beckhoff EL3681 Documentation page 32

Basics communication
Fig. 11: "CoE Online" tab
The figure above shows the CoE objects available in device "EL2502", ranging from 0x1000 to 0x1600. The
subindices for 0x1018 are expanded.
Changes in the CoE directory (CAN over EtherCAT), program access
When using/manipulating the CoE parameters observe the general CoE notes in chapter "CoE interface" of
the EtherCAT system documentation:
• Keep a startup list if components have to be replaced,
• Distinction between online/offline dictionary,
• Existence of current XML description (download from the Beckhoff website),
• "CoE-Reload" for resetting the changes
• Program access during operation via PLC (see TwinCAT3 | PLC Library: Tc2_EtherCAT and Example
program R/W CoE)
Data management and function "NoCoeStorage"
Some parameters, particularly the setting parameters of the slave, are configurable and writeable. This can
be done in write or read mode
• via the System Manager (Fig. "CoE Online" tab) by clicking
This is useful for commissioning of the system/slaves. Click on the row of the index to be
parameterized and enter a value in the "SetValue" dialog.
• from the control system/PLC via ADS, e.g. through blocks from the TcEtherCAT.lib library
This is recommended for modifications while the system is running or if no System Manager or
operating staff are available.
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NOTICE
Version: 3.0 EL3681