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Precautions for Correct Use
NX-series NX1P2 CPU Unit Hardware User’s Manual (W578)
• For EtherCAT and EtherNet/IP, use the connection methods and cables that are specified in the
NJ/NX-series CPU Unit Built-in EtherCAT Port User’s Manual (Cat. No. W505) and the NJ/NX-series
CPU Unit Built-in EtherNet/IP Port User’s Manual (Cat. No. W506). Otherwise, communications may
be faulty.
• Use the rated power supply voltage for the Units that supply power. Take appropriate measures to
ensure that the specified power with the rated voltage and frequency is supplied in places where the
power supply is unstable.
• Make sure that the current capacity of the wire is sufficient. Otherwise, excessive heat may be gener-
ated. When cross-wiring terminals, the total current for all the terminals will flow in the wire. When
wiring cross-overs, make sure that the current capacity of each of the wires is not exceeded.
• If you use reed switches for the input contacts for AC Input Units, use switches with a current capac-
ity of 1 A or greater.
If reed switches with smaller allowable currents are used, the contacts may fuse due to surge cur-
rents.
• Confirm the device output hold configuration before you change the operating mode of the CPU Unit
or execute the download.
• In applications that use the results of instructions that read the error status, consider the affect on the
system when errors are detected and program error processing accordingly. For example, even the
detection of a minor error, such as Battery replacement during operation, can affect the system
depending on how the user program is written.
• If you change the event level of a Controller error, the output status when the error occurs may also
change. Confirm safety before use.
• When you edit the restore command file or the automatic transfer command file, do not change any-
thing in the file except for the “yes” and “no” specifications for the selectable data groups. If you
change anything else in the file, the Controller may perform unexpected operation when you restore
or automatically transfer the data.
• To prevent an unexpected restoration, set to enter the password for each execution before the
restore operation.
• If you use the program transfer from SD Memory Card, set to enter the password for each execution
to prevent an unexpected program transfer.
• 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.
• If a Task Period Exceeded error occurs, shorten the programs to fit in the task period or increase the
setting of the task period.
Operation
Error Processing
Restoring and Automatically Transferring Data
Transferring Programs
Replacing Slaves and Units
Task Settings
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