Omron NX-ID3343 User Manual page 20

Precautions for Safe Use
Sysmac Studio and you can check the actual slave revisions from the Sysmac Studio or on slave
nameplates.
• After you transfer the user program, the CPU Unit is restarted and communications with the Ether-
CAT slaves are cut off. During that period, the slave outputs behave according to the slave settings.
The time that communications are cut off depends on the EtherCAT network configuration.
Before you transfer the user program, confirm that the system will not be adversely affected.
• EtherCAT communications are not always established immediately after the power supply is turned
ON. Use the system-defined variables in the user program to confirm that communications are estab-
lished before attempting control operations.
• If frames sent to EtherCAT slaves are lost due to noise or other causes, slave I/O data is not commu-
nicated, and the intended operation is sometimes not achieved. Perform the following processing if
noise countermeasures are necessary.
Program the _EC_InDataInvalid (Input Data Disable) system-defined variable as an interlock condi-
tion in the user program.
Set the PDO communications consecutive timeout detection count setting in the EtherCAT master to
at least 2.
Refer to the NJ-series CPU Unit Built-in EtherCAT Port User's Manual (Cat. No. W505) for details.
• When an EtherCAT slave is disconnected, communications will stop and control of the outputs will be
lost not only for the disconnected slave, but for all slaves connected after it. Confirm that the system
will not be adversely affected before you disconnect a slave.
• If you disconnect the cable from an EtherCAT slave to disconnect it from the network, any current
communications frames may be lost. If frames are lost, slave I/O data is not communicated, and the
intended operation is sometimes not achieved. Perform the following processing for a slave that
needs to be replaced.
Program the _EC_InDataInvalid (Input Data Disable) system-defined variable as an interlock condi-
tion in the user program.
Set the PDO communications consecutive timeout detection count setting in the EtherCAT master to
at least 2.
Refer to the NJ-series CPU Unit Built-in EtherCAT Port User's Manual (Cat. No. W505) for details.
Unit Replacement
• When you replace a Unit, start operation only after you transfer the settings and variables that are
required for operation to the new Unit.
Disposal
• Dispose of the product according to local ordinances as they apply.
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NX-series Digital I/O Unit User's Manual (W521)