Fig. 10 Coe-Online Tab - Beckhoff EP3356-0022 Documentation

Fig. 10: CoE-Online tab
The CoE objects from 0x1000 to 0x1600, which are available in the example device "EL2502", can be seen
in the above figure; the subindices from 0x1018 are expanded.
Data management
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 (figure above) 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 function 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.
Data management
If CoE parameters on the slave are changed online, this is saved fail-safe in the device (EEPROM)
in Beckhoff devices. This means that the changed CoE parameters are still retained after a restart.
The situation may be different with other manufacturers.
Startup list
Startup list
Changes in the local CoE list of the terminal are lost if the terminal is replaced. If a terminal is re-
placed with a new Beckhoff terminal, it will have the factory settings. It is therefore advisable to link
all changes in the CoE list of an EtherCAT slave with the Startup list of the slave, which is pro-
cessed whenever the EtherCAT fieldbus is started. In this way a replacement EtherCAT slave can
automatically be parameterized with the specifications of the user.
If EtherCAT slaves are used which are unable to store local CoE values permanently, the Startup
list must be used.
Recommended approach for manual modification of CoE parameters
• Make the required change in the System Manager. The values are stored locally in the EtherCAT slave
EP3356-0022 Version: 1.1.0
Basics of communication
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