Omron CK3E-1210 Hardware User Manual page 15

Turning OFF the Power Supply
• Do not turn off the power supply or remove the USB memory device while the Controller is accessing
the USB memory device. Data may become corrupted, and the Controller will not operate correctly if
it uses corrupted data.
• Always turn OFF the power supply before you attempt any of the following.
Connecting cables or wiring the system
Connecting or disconnecting the connectors
• If the product experiences a sudden loss of power or disconnecting the cable while saving a setting
or transfer of data is underway, the changes may not be stored and unexpected behavior may occur.
Operation
Confirm that no adverse effects will occur in the system before you attempt any of the following.
• Changing the operating mode of the Controller (including changing the setting of the Startup Mode)
• Changing the user program or settings
• Changing set values or present values
EtherCAT Communications
• Make sure that the communications distance, number of nodes connected, and method of connec-
tion for EtherCAT are within specifications.
Do not connect EtherCAT communications to EtherNet/IP, a standard in-house LAN, or other net-
works. An overload may cause the network to fail or malfunction.
• If the Fail-soft Operation parameter is set to stop operations, process data communications will stop
for all slaves when an EtherCAT communications error is detected in a slave. For this reason, if
Servo Drives are connected, the Servos for all axes will be turned OFF. At that time, the Servo Drive
will operate according to the Servo Drive specifications. Make sure that the Fail-soft Operation
parameter setting results in safe operation when a device error occurs.
• If noise occurs or an EtherCAT slave is disconnected from the network, any current communications
frames may be lost. If frames are lost, slave I/O data is not communicated, and unintended operation
may occur. The slave outputs behave according to the slave specifications. For details, refer to rele-
vant manuals for each slave.
• When an EtherCAT slave is disconnected or disabled, 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 or disable a slave.
• You cannot use standard Ethernet hubs or repeater hubs with EtherCAT communications. If you use
one of these, a major fault level error or other error may occur.
• EtherCAT communications are not always established immediately after the power supply is turned
ON. Use the system-defined variables and the EtherCAT Coupler Unit device variables in the user
program to confirm that I/O data communications are established before attempting control opera-
tions.
• If you need to disconnect the cable from an EtherCAT slave during operation, first reset the EtherCAT
and EtherCAT slaves that are connected after it to the Init state, then disconnect the EtherCAT slave.
• For EtherCAT and EtherNet, use the connection methods and cables that are specified in this man-
ual. Otherwise, communications may be faulty.
• Make sure that all of the slaves to be restored are participating in the network before you reset 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 a slave with a different node address than the
specified node address, or the error may not be reset correctly.
CK3E-series Programmable Multi-Axis Controller Hardware User's Manual (I610)
Precautions for Safe Use
13