Real-Time Clock Function File - Allen-Bradley MicroLogix 1400 Instruction Manual

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Real-Time Clock
Function File

Real-Time Clock Function File

Feature
YR - RTC Year
MON - RTC Month
DAY - RTC Day of Month
HR - RTC Hours
MIN - RTC Minutes
SEC - RTC Seconds
DOW - RTC Day of Week
DS - Disabled
BL - RTC Battery Low
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.
Address Data Format
RTC:0.YR word
RTC:0.MON word
RTC:0.DAY word
RTC:0.HR word
RTC:0.MIN word
RTC:0.SEC word
RTC:0.DOW word
RTC:0/DS binary
RTC:0/BL binary
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.
Range Type
1998...2097 status
1...12 status
1...31 status
0...23 (military time) status
0...59 status
0...59 status
0...6 (Sunday to Saturday) status
0 or 1 status
0 or 1 status
Publication 1766-RM001A-EN-P - October 2008
Function Files 57
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