Omron Sysmac NJ Series User Manual page 146

5 Setting Up EtherCAT Communications with the Sysmac Studio
Precautions for Safe Use
• EtherCAT communications are not always established immediately after the power supply is
turned ON. Use the system-defined variable in the user program to confirm that communica-
tions are established before you attempt to control device variables and Axis Variables.
• After you change any EtherCAT slave or Special Unit settings, carefully check the safety of
the controlled system before you restart the Unit.
Precautions for Correct Use
• When you change the EtherCAT slave configuration and reconfigure the axis allocation set-
tings, you must download the network configuration information again.
• If network configuration information is not downloaded to the Controller, the EtherCAT master
will not perform process data communications. Because of this, notification of errors will not
occur. The EtherCAT communications will be in the Init state (where both process data com-
munications and SDO communications are disabled).
Checking the EtherCAT Network Line Quality
If you need to confirm that the network was correctly installed after configuring an EtherCAT network,
diagnose the EtherCAT network line quality. For how to diagnose the EtherCAT network line quality,
refer to 9-2-4 Diagnostic and Statistical Information on page 9-3.
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NJ/NX-series CPU Unit Built-in EtherCAT Port User's Manual (W505)