During the switchover from daylight-saving to standard time the local time is put back onehour. This, however, means that one hour is run through twice. (For CE(S)T the designa-tors 2A and 2B apply). For an LT (local time) within this hour, no unique identification rela-tive to a base time is possible. FC LT_BT receives an LT as an input parameter and mustdecide whether the time is standard or daylight-saving before converting it to BT. If the LTis within the double hour, the LT is interpreted as standard time. This is reported withreturn value 2 or 3.FC 62 LT_BT can be called in any priority class.Internally, FC 62 uses the following functions. These functions must be loaded in yourproject with the numbers shown here. FC1 (AD_DT_TM), FC7 (DT_DAY), FC35(SB_DT_TM)Output Values / ErrorsRET_VAL LT Description0 Base time Block executed error-free1 Base time No error, but date jump2 Base time The LT at the input is withinthe "double" hour3 Base time As 2, also date jump4 Base time The LT at the input is withinthe "forbidden" hour5 Base time As 4, also date jump8082 DT#90-01-01-0:0:0 Invalid data in the rule datablock15.6.4 FC 63 - S_LTINT - Set time interrupt in local timeThe FC sets the required time-of-day interrupt at the set time. This time is output in localtime.ParametersParameter Declaration Data type DescriptionOB_NR INPUT INT No of the OB to be started (permitted 10 – 17)SDT INPUT BLOCK_DB Start date and time-of-day in local time (see SFC28)PERIOD INPUT INT Period from start point SDT:n W#16#0000 = oncen W#16#0201 = every minuten W#16#0401 = every hourn W#16#1001 = dailyn W#16#1201 = weeklyn W#16#1401 = monthlyn W#16#1801 = annuallyn W#16#2001 = at end of month"Double Hour"Calling OBsCall EnvironmentDescriptionVIPA SPEED7 StandardTime Functions > FC 63 - S_LTINT - Set time interrupt in local timeHB00 | OPL_SP7 | Operation list | en | 18-30 881
