212 Rockwell Automation Publication 1426-UM001J-EN-P - August 2019
Chapter 8 Other Functions
Date_Day
These values are for this parameter: 1 (default)…31
Time_Hour
These values are for this parameter: 0 (default)…23
Time_Minute
These values are for this parameter: 0 (default)…59
Time_Seconds
These values are for this parameter: 0 (default)…59
Time_Milliseconds
These values are for this parameter: 0 (default)…999
Daylight Saving Time Setup
Daylight saving time (DST) setup parameters are found in the 
Configuration.System.General
 table on page 293.
The DST format is split into Month/Week/Day:
• Month Settings: 01= January 12= December
• Week Settings: 01=1
st
 week 05= last week
• Day Settings: 01= Sunday, 07 = Saturday
• For example: 040107= April/1
st
 Week/Saturday
Table 28 - Daylight Saving Time Parameters
Parameter Description Range Default
Hour_of_ Day_Start 0…23 2 a.m.
Daylight_Savings_Month/Week/Day_Start Format is Month/Week/Day. (See Daylight Saving 
Time Setup for clarification)
10101…120507 030201 March, 2nd week, Sunday
Return_from_Daylight_Savings_Month/Week/Day Format same as start date 10101…120507 110101 November, 1st week, Sunday
Hour_of_Day_End 0…23 2 a.m.