8-3
8 CPU Unit Functions
NJ-series CPU Unit Software User’s Manual (W501)
8-1 Data Management, Clock, and Operating Functions
8
8-1-1 Clearing All Memory
8-1 Data Management, Clock, and
Operating Functions
This section describes the data management, clock, and operating functions.
You can initialize the user program, Controller Configurations and Setup, and variables in the CPU Unit
to the defaults from the Sysmac Studio. This is called the Clear All Memory operation.
• The Clear All Memory operation can be performed only in PROGRAM mode.
• You cannot execute the Clear All Memory operation when write protection of the CPU Unit is
set in the security functions.
• Do not turn OFF the power supply to the Controller during the Clear All Memory operation.
After you clear the memory, the CPU Unit operates in the same way as immediately after you create the
system configuration with the CPU Unit in the factory default condition.
The absolute encoder home offset is not cleared.
Operations from the Sysmac Studio
Connect the Sysmac Studio to the CPU Unit online, and select Clear All Memory from the Control-
ler Menu.
A clock (RTC) is built into the CPU Unit. The clock data from this clock is used for timestamps in the
event logs and for the time and date of files that are created on the SD Memory Card.
The following functions are supported.
• Reading/writing the clock from the Sysmac Studio
• Reading/writing the clock with instructions
• Reading the clock from system-defined variables (Writing is not possible.)
• Correcting the clock from an NTP Server
8-1-1 Clearing All Memory
8-1-2 Clock
Introduction
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