6. Function blocks6.1 Manufacturer function blocks6.1.1.6 YT - Year time switch (Year Table)easyE4 devices feature a real-time clock with a date and time functionality.When combined with the WT, YT or HW, HY function blocks, this real-time clock makesit possible to implement the functionality of a time switch.GeneralThis 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 time switches can be used to easily configure unique orrecurring switching events.The following operating modes are available within this con-text:l Fixed datel Fixed date for every yearl Weekday rulel Easter ruleVariable holidays other than Easter cannot be selected.Operating principleEach of the 32 year time switches, YT01 through YT32, features eight channels that caneach 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.The function block and its parametersFunction block inputsDescription Note(Bit)EN 1: Activates the function block. The checkbox for theFunction block release by EN isnecessaryparameter must first be enabledAssigning operandsYou can assign the following operands to the function block inputs that are numericinputs.easyE4 11/18 MN050009 EN www.eaton.com 209
