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CP1E CPU Unit Hardware User’s Manual(W479)
Be sure to sufficiently confirm the safety at the destination when you transfer
the program or I/O memory or perform procedures to change the I/O memory.
Devices connected to PLC outputs may incorrectly operate regardless of the operat-
ing mode of the CPU Unit.
With an E-type CPU Unit or with an N/NA-type CPU Unit without a Battery, the con-
tents of the DM Area (D) * , Holding Area (H), the Counter Present Values (C), the
status of Counter Completion Flags (C), and the status of bits in the Auxiliary Area (A)
related to clock functions may be unstable when the power supply is turned ON.
*This does not apply to areas backed up to EEPROM using the DM backup function.
If the DM backup function is being used, be sure to use one of the following methods
for initialization.
1. Clearing All Areas to All Zeros
Select the Clear Held Memory (HR/DM/CNT) to Zero Check Box in the Startup
Data Read Area in the PLC Setup.
2. Clearing Specific Areas to All Zeros or Initializing to Specific Values
Make the settings from a ladder program.
If the data is not initialized, the unit or device may operate unexpectedly because of
unstable data.
Execute online edit only after confirming that no adverse effects will be caused
by extending the cycle time.
Otherwise, the input signals may not be readable.
Tighten the screws on the terminal block of the AC power supply section to the
torque specified in the user’s manual.
The loose screws may result in burning or malfunction.
Do not touch the power supply section when power is being supplied or imme-
diately after the power supply is turned OFF.
The power supply section and I/O terminal blocks will be hot and you may be burned.
CautionCaution
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