Omron NJ501-1400 User Manual page 31

Transferring Programs
• If you use the program transfer from SD Memory Card, set to enter the password for each execution
to prevent an unexpected program transfer.
Replacing Slaves and Units
• If you replace a slave or Unit, refer to the operation manual for the slave or Unit for information on the
data required for individual slaves or Units and redo the necessary settings.
Task Settings
• If a Task Period Exceeded error occurs, shorten the programs to fit in the task period or increase the
setting of the task period.
Motion Control
• Use the system-defined variable in the user program to confirm that EtherCAT communications are
established before you attempt to execute motion control instructions. Motion control instructions are
not executed normally if EtherCAT communications are not established.
• Use the system-defined variables to monitor for errors in communications with the slaves that are
controlled by the motion control function module. Motion control instructions are not executed nor-
mally if an error occur in slave communications.
• Before you start an MC Test Run, make sure that the operation parameters are set correctly.
• Do not download motion control settings during an MC Test Run.
EtherCAT Communications
• If you need to disconnect the cable from an EtherCAT slave during operation, first disconnect the
software connection to the EtherCAT slave or disable the EtherCAT slave and all of the EtherCAT
slaves that are connected after it.
• Set the Servo Drives to stop operation if an error occurs in EtherCAT communications between the
Controller and a Servo Drive.
• Make sure that all of the slaves to be restored are participating in the network before you reset a Net-
work Configuration Verification Error, Process Data Communications Error, or Link OFF Error in the
EtherCAT Master Function Module. If any slave is not participating when any of these errors is reset,
the EtherCAT Master Function Module may access slave with a different node address than the
specified node address or the error may not be reset correctly.
• Always use the specified EtherCAT slave cables. If you use any other cable, the EtherCAT master or
the EtherCAT slaves may detect an error and one of the following may occur.
• Continuous refreshing of process data communications will not be possible.
• Continuous refreshing of process data communications will not end during the set cycle.
NJ-series CPU Unit Hardware User's Manual (W500)
Precautions for Correct Use
29