Siemens S7-1200 - Status ob; Update ob

PLC concepts
4.1 Execution of the user program
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG
93
Time of day events
You can configure a time of day interrupt event to occur once on a specified date or time or
cyclically with one of the following cycles:
● Every minute: The interrupt occurs every minute.
● Hourly: The interrupt occurs every hour.
● Daily: The interrupt occurs every day at a specified time (hour and minute).
● Weekly: The interrupt occurs every week at a specified time on a specified day of the
week (for example, every Tuesday at 4:30 in the afternoon).
● Monthly: The interrupt occurs every month at a specified time on a specified day of the
month. The day number must be between 1 and 28, inclusive.
● Every end of month: The interrupt occurs on the last day of every month at a specified
time.
● Yearly: The interrupt occurs every year on the specified date (month and day). You
cannot specify a date of February 29.
Table 4- 9 Start information for a time of day event OB
Input
Data type
Description
CaughtUp
Bool
OB call is caught up because time was set forward
SecondTimes
Bool
OB call is started a second time because time was set backward
4.1.3.11
Status OB
Status OBs execute if a DPV1 or PNIO slave triggers a status interrupt. This might be the
case if a component (module or rack) of a DPV1 or PNIO slave changes its operating mode,
for example from RUN to STOP.
Status events
For detailed information on events that trigger a status interrupt, refer to the manufacturer's
documentation for the DPV1 or PNIO slave.
Table 4- 10 Start information for status OB
Input
Data type
Description
LADDR
HW_IO
Hardware identifier
Slot
UInt
Slot number
Specifier
Word
Alarm specifier
4.1.3.12
Update OB
Update OBs execute if a DPV1 or PNIO slave triggers an update interrupt.