Setting Clock Using Special Messages; Special Message 12: Interactive Clock Setting - Allen-Bradley A-B QUALITY DL20 Series User Manual

Chapter 5
Run Mode
Special Messages
5–10

Setting Clock Using Special Messages

Special messages #12 and #13 allow you to set the clock remotely from the
programmable controller either:
Interactively. This is most useful when the programmable controller does
not know the time, but the operator does.
With variable data. This is useful when the host controlling the DL20
does have the time available.

Special Message 12: Interactive Clock Setting

Special message #12 allows the clock to be set interactively. When special
message #12 is triggered, the current clock setting is displayed on line 1 of
the DL20. After triggering special message #12, trigger messages to set the
time and date.
Message #1 increments the seconds
Message #2 increments the minutes.
Message #4 increments the hour.
Message #16 increments the day (Sunday, Monday, Tuesday).
Message #32 increments the date.
Message #64 causes the month to increment.
Message #128 forces PM mode, if the clock is in 12-hour display mode.
When the hour is incremented, the display automatically assumes it is
AM. If you need to set a PM time, trigger message #128 to force PM
mode after the correct hour is set.
Message #8 resumes run mode, even if a regular message is programmed
in as message number 8.
Note: When setting the clock interactively, you cannot change the year or
clock display mode (12-or 24-hour display). Setting the clock with special
message #13 allows you to change all clock settings.