basics

thnak u
i have been with timers and i understood when to use en bit,dnbit,
when to use T acc BIT AND T ttbit
tt is the time interval between acc value to reach and preset value right right
then wht is t acc

this is AB specific only -
EN - enable bit - timer has been turned on
TT - timer is timing out to operate its contact. either XIC or XIO
ACC - accumulation value - used to monitor the timer value.
PRE - Preset value - used to remotely change or preset the time value
DN - timed out bit - Time sequence completed