Yt - Year Time Switch (Year Table) - Eaton easyE4 Manual

6.1.1.6 YT - Year time switch (Year Table)

easyE4 devices feature a real-time clock with a date and time functionality.
When combined with the HW, HY or WT, YT function blocks, this real-time clock makes
it possible to implement the functionality of a weekly timer and year time switch.
→ Section "Time and Date setting", page 587
The AC manufacturer function block, Astronomic clock, can be used to program switch-
ing operations based on sunrise and sunset times. In order for this to work properly, the
settings for the device clock and the device location's time zone and geographic
coordinates must be correctly selected in this tab.
General
This function block is an enhanced version of the existing HY -
year time switch function block.
easyE4 base devices provide 32 year time switches (new),
YT01 through YT32 (Year Table).
Year time switches can be used to easily configure unique or
recurring switching events.
The following operating modes are available within this con-
text:
Fixed date
l
Fixed date for every year
l
Weekday rule
l
Easter rule
l
Variable holidays other than Easter cannot be selected.
Operating principle
Each of the 32 year time switches, YT01 through YT32, features eight channels that can
each be configured with an ON event and an OFF event in the parameters for the func-
tion block. All channels act jointly on function block output Q1.
easyE4 10/19 MN050009 EN www.eaton.com
6. Function blocks
6.1 Manufacturer function blocks
261