• 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
.
a) Continuous refreshing of process data communications will not be possible.
b) Continuous refreshing of process data communications will not end during the set cycle.
• When the wiring for slaves in the ring topology is incorrect and input ports or output ports are con-
nected each other, an EtherCAT Frame Not Received will occur and message communications and
process data communications may stop. Therefore, make sure that the wiring of communications
cables for slaves is correct.
• If a power OFF or disconnection occurs in a slave that is outside the ring topology or an error in the
EtherCAT master is reset, when there is a synced slave in the actual network configuration, the ca-
ble redundancy status is reset temporarily for DC Synchronous Correction.
Battery Replacement
• Be sure to mount a Battery within two years of the production date shown on the Battery label.
• T
urn ON the power after replacing the Battery for a CPU Unit that has been unused for a long time.
Leaving the CPU Unit unused again without turning ON the power even once after the Battery is
replaced may result in a shorter Battery life.
• If you use the Battery, use the CJ1W-BAT01 Battery Set which is sold separately.
SD Memory Cards
• Insert the SD Memory Card all the way.
• Do not turn OFF the power supply to the Controller during SD Memory Card access. The files may
be corrupted.
If there is a corrupted file in the SD Memory Card, the file is automatically deleted by the restoration
function when the power supply is turned ON.
•
If you use an OMRON SD Memory Card, the end of the life of the SD Memory Card can be detected
in the following ways.
a) _Card1Deteriorated (SD Memory Card Life Warning Flag) system-defined variable
b) SD Memory Card Life Exceeded (Observation) event in the event log
When the end of the life is detected in any of the above ways, replace the SD Memory Card.
Version Information
Combination of the CPU Unit version and SD Memory Card determines whether the SD memo-
ry card life expiration detection function can be used or not. Refer to Specification of Supported
SD Memory Cards, Folders, and Files in the NJ/NX-series CPU Unit Software User’
s Manual
(Cat. No. W501) for details.
Debugging
• When performing online editing, the CPU Unit saves a program updated by the online editing to
built-in non-volatile memory. Sysmac Studio shows a message that it is in a backup operation. Do
not turn OFF the power supply to the Controller while this message is displayed. If the power supply
to the Controller is turned OFF
, a Controller error will occur when the power supply is turned ON
next time.
Precautions for Correct Use
35
NX-series NX502 CPU Unit Hardware User's Manual (W629)
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