Publication 1766-RM001A-EN-P - October 2008
Function Files 57
Real-Time Clock
Function File
The real-time clock provides year, month, day of month, day of week,
hour, minute, and second information to the Real-Time Clock (RTC)
Function File in the controller.
The Real-Time Clock parameters and their valid ranges are shown in the
table below.
Writing Data to the Real-Time Clock
The programming screen is shown below:
When valid data is sent to the real-time clock from the programming
device or another controller, the new values take effect immediately. In
RSLogix 500/RSLogix Micro, click on Set Date & Time in the RTC Function
File screen to set the RTC time to the current time on your PC.
Real-Time Clock Function File
Feature Address Data Format Range Type User Program Access
YR - RTC Year RTC:0.YR word 1998…2097 status read-only
MON - RTC Month RTC:0.MON word 1…12 status read-only
DAY - RTC Day of Month RTC:0.DAY word 1…31 status read-only
HR - RTC Hours RTC:0.HR word 0…23 (military time) status read-only
MIN - RTC Minutes RTC:0.MIN word 0…59 status read-only
SEC - RTC Seconds RTC:0.SEC word 0…59 status read-only
DOW - RTC Day of Week RTC:0.DOW word 0…6 (Sunday to Saturday) status read-only
DS - Disabled RTC:0/DS binary 0 or 1 status read-only
BL - RTC Battery Low RTC:0/BL binary 0 or 1 status read-only
efesotomasyon.com - Allen Bradley,Rockwell,plc,servo,drive
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