Variable Data type DescriptionOB55_PRIORITY BYTE Configured priority class:Default value: 2OB55_OB_NUMBR BYTE OB number (55)OB55_RESERVED_1 BYTE reservedOB55_IO_FLAG BYTE Input module: 54hOutput module: 55hOB55_MDL_ADDR WORD Logical base address of the module that triggers the inter-ruptOB55_LEN BYTE Data block length supplied by the interruptOB55_TYPE BYTE ID for the interrupt type "Status interrupt"OB55_SLOT BYTE Slot number of the interrupt triggering component (module)OB55_SPEC BYTE Specifier:n Bit 1, 0: Interrupt specifiern Bit 2: Add_Ackn Bit 7 ... 3: Seq. numberOB55_DATE_TIME DATE_AND_TIME Date and time of day when the OB was calledYou can obtain the full additional information on the interrupt from theframe by calling SFB 54 "RALRM" in OB 55.Ä Chap. 14.2.22 ‘SFB 54 -RALRM - Receiving an interrupt from a periphery module’ page 7776.4.2 OB 56 - DP: Update Alarm - Update InterruptA update interrupt OB (OB 56) is only available for DP-V1 capable CPUs.The CPU operating system calls OB 56 if an update interrupt was triggered via the slot ofa DP-V1 slave. This can be the case if you have changed the parameters for the slot of aDP-V1 slave. For precise information on events that trigger an update interrupt, refer tothe documentation of the DP-V1 slave manufacturer.The following table describes the start information of the OB 56 with default names of thevariables and its data types:Variable Data type DescriptionOB56_EV_CLASS BYTE Event class and identifiers:11h: incoming eventOB56_STRT_INF BYTE 56h: Update interrupt for DP59h: Update interrupt for PROFINET IODescriptionLocal dataVIPA SPEED7 Organization BlocksCommunication Interrupts > OB 56 - DP: Update Alarm - Update InterruptHB00 | OPL_SP7 | Operation list | en | 18-30 75
