The Real-Time Clock

Setting and Displaying the Real-Time Clock \ with the PLC-Browser

The PLC browser commands date and time are used to set the real-time clock.

The commands date <ENTER> or time <ENTER> display the current date and time of the real-time clock.

The command: date yyyy-mm-dd<ENTER> (year-month-day) sets the date.

The command: time hh-mm-ss<ENTER> (hours-minutes-seconds) sets the time.

Example:

1. Enter the date:

   date 2005-02-22<ENTER>

   ⇒

   Display: date 2005-02-22   Clock set to 2005-02-22 08:01:07

   Note

   (Remark: the time remains unchanged)

2. Enter the time:

   time 16:50<ENTER> (seconds are optional)

   ⇒

   Display:time 16:50    Clock set to 2005-02-22 16:50:00

Setting and Displaying the Real-Time Clock \ with the User Program

The following blocks located in the folder “Realtime clock” of the system library SysExt_AC500_Vxx.lib can be used to set and display the real-time clock (RTC) with help of the user program:

Block	Function
CLOCK: CLOCK CLOCK	Sets and displays the real-time clock with values for year, month, day, hours, minutes and seconds. Also the day of week is indicated (Mo=1, Tue=2, Wed=3, Thu=4, Fr=5, Sa=6, Su=0). Note: The week of day cannot be set. It is given by the real-time clock. The input DAY_SET is ignored.
CLOCK_DT: CLOCK_DT CLOCK_DT	Sets and displays the real-time clock in DT format, for example DT#2005-02-17-17:15:00.

The blocks CLOCK and CLOCK_DT are described in the documentation for the system library SysExt_AC500_Vxx.lib.