Rockwell Automation 1761 MicroLogix 1000 Programmable Controllers - Manual (Page 301)

Programming Reference
B–13
S:5/1 Reserved NA NA
S:5/2 Control
Register Error Dynamic
Configuration The LFU, LFL, FFU, FFL, BSL, BSR, SQO,
SQC, and SQL instructions are capable of
generating this error. When bit S:5/2 is set, it
indicates that the error bit of a control word
used by the instruction has been set.
If this bit is ever set upon execution of the END
or TND instruction, major error (0020) is
declared. To avoid this type of major error from
occurring, examine the state of this bit
following a control register instruction, take
appropriate action, and then clear bit S:5/2
using an OTU instruction with S:5/2.
S:5/3 Major Error
Detected
While
Executing
user-fault
routine Dynamic
Configuration When set, the major error code (S:6)
represents the major error that occurred while
processing the fault routine due to another
major error.
S:5/4 to
S:5/7 Reserved NA NA
S:5/8 Retentive
Data Lost Status This bit is set whenever retentive data is lost.
This bit remains set until you clear it. While
set, this bit causes the controller to fault prior to
the first true scan of the program.
S:5/9 Reserved NA NA
S:5/10 STI Lost Status This bit is set whenever the STI timer expires
while the STI routine is either executing or
disabled and the pending bit (s:2/0) is already
set.
S:5/11 to
S:5/12 Reserved NA NA
S:5/13 Input Filter
Selection
Modified Status This bit is set whenever the discrete input filter
selection in the controller is made compatible
with the hardware. Refer to page A–7 for more
information.
S:5/14 to
S:5/15 Reserved NA NA
NA = Not Applicable
Reference