If a time-delay interrupt OB is called but was not programmed, the operating system callsOB 85. If OB 85 was not programmed, the CPU goes to STOP.The following table describes the start information of the OB 20 and OB 21 with defaultnames of the variables and its data types:Variable Type DescriptionOB20_EV_CLASS BYTE Event class and identifiers:11h: interrupt is activeOB20_STRT_INF BYTE 21h: start request for OB 2022h: start request for OB 21OB20_PRIORITY BYTE assigned priority class:Default:3 (OB 20)...6 (OB 23)OB20_OB_NUMBR BYTE OB number (20, 21)OB20_RESERVED_1 BYTE reservedOB20_RESERVED_2 BYTE reservedOB20_SIGN WORD User ID:input parameter SIGN from the call for SFC 32 (SRT_DINT)OB20_DTIME TIME Configured delay time in msOB20_DATE_TIME DATE_AND_TIME Date and time of day when the OB was calledInformation to access the local data can be found at the description of the OB 1.6.6 Time of day Interrupts6.6.1 OB 10, OB 11 - TOD_INTx - Time-of-day InterruptTime-of-day interrupts are used when you want to run a program at a particular time,either once only or periodically. Time-of-day interrupts can be configured within the hard-ware configuration or controlled by means of system functions in your main program atrun time. The prerequisite for proper handling of time-of-day interrupts is a correctly setreal-time clock on the CPU. For execution there are the following intervals:n oncen every minuten hourlyn dailyn weeklyn monthlyn once at yearn at the end of each monthBehavior on errorLocal dataDescriptionVIPA SPEED7Organization BlocksTime of day Interrupts > OB 10, OB 11 - TOD_INTx - Time-of-day InterruptHB00 | OPL_SP7 | Operation list | en | 18-3078
