Technical data

System Status Lists (SSL)
System Software for S7-300/400 System and Standard Functions - Volume 2/2
33-22 A5E00739858-01
Data Record
A data record of partial list extract SSL-ID W#16#xy22 has the following structure:
Name Length Meaning
info 10 words Start info for the given OB, with following exceptions:
• OB 1 provides the current minimum (in bytes 8 and 9) and maximum
cycle time (in bytes 10 and 11) (time base: ms, byte count begins at 0).
• When a job is active for a time-delay interrupt, bytes 8 and 11 (byte count
begins at ) get the remaining time in ms left of the delay time set as a
parameter.
• OB 80 contains the configured minimum (in bytes 8 and 9) and maximum
cycle time (in bytes 10 and 11) (time base: ms, byte count begins at 0).
• Error interrupts without the current information
• Interrupts contain the status info from the current parameter settings of
the interrupt source.
• In the case of synchronous errors, the priority class entered is B#16#7F if
the OBs were not yet processed; otherwise, the priority class of the last
call.
• If an OB has several start events and these have not yet occurred at the
information time, then event no. W#16#xyzz is returned with x: event
class, zz: smallest defined number in the group, y: undefined. Otherwise,
the number of the last start event that occurred is used.
al 1 1 word Processing identifiers:
Bit 0: Interrupt event is caused by parameters
= 0: Enabled
= 1: Disabled
Bit 1: Interrupt event as per SFC 39 "DIS_IRT"
= 0: Not locked
= 1: Locked
Bit 2 = 1: Interrupt source is active (generation job ready for
time interrupts, time-of-day OB started,
time-delay interrupt OB started,
cyclic interrupt OB was configured with STEP 7)
Bit 4: Interrupt OB
= 0: Is not loaded
= 1: Is loaded
Bit 5: Interrupt OB is by TIS
= 1: Locked
Bit 6: Entry in diagnostic buffer
= 1: Locked
al 2 1 word Reaction with not loaded/locked OB
Bit 0 = 1: Lock interrupt source
Bit 1 = 1: Generate interrupt event error
Bit 2 = 1: CPU goes into STOP mode
Bit 3 = 1: Interrupt only discarded
al 3 2 words Discarded by TIS functions:
Bit no. x set means: the event number that is greater by x than the smallest
event number of the affected OB is discarded by the TIS function.