8 CPU Unit Functions
8-4
NJ-series CPU Unit Software User’s Manual (W501)
Precautions for Correct UsePrecautions for Correct Use
The clock data is retained by the Battery when the power is turned OFF. The clock data is not
correct when the power is turned ON. You can reset the clock data from an NTP server over an
EtherNet/IP network after the power is turned ON.
Clock Data Range
The range of the clock is 1970-01-01 to 2106-02-06 (January 1, 1970 to February 6, 2106).
Setting the Time Zone and the Local Time
Before you use the CPU Unit for the first time, set the time zone and local time in the clock data. You
can set the time zone and local time from the Sysmac Studio in the Controller Clock Dialog Box.
The clock data that is read by the EtherCAT slaves and CJ-series CPU Units from the CPU Unit and
the clock data that is set are the local times in the time zone.
When a Battery is not mounted or when the Battery voltage is low, the time zone setting is
retained, but the clock data is not retained and will not be correct.
Use one of the following methods.
Changing Clock Data from the Sysmac Studio
You can use the Sysmac Studio to synchronize the clock data of the built-in clock with the clock on
the computer.
Changing Clock Data with Instructions
You can use the SetTime instruction to set the clock data.
Changing the Clock Data from an NTP Server
You can use an NTP server on EtherNet/IP to set the clock data.
Setting the Clock Data
• Reading/writing the clock from the Sysmac Studio
Battery
CJ1W-BAT01
Battery backup
• Time and date of files that are
created on SD Memory Card
• Event logs
• Reading/writing the clock with instructions
Clock data
CPU Unit
• Correcting the clock from an NTP server
To Next Page
Loading...
Need help?
General
