Publication 1747-RM001G-EN-P - November 2008
B-6 SLC Status File
S:0/3 Status Sign Bit
This bit is set by the processor when the result of a math,
logical, or move instruction is negative. Otherwise the bit
remains cleared.
•••••
When a STI, I/O Slot, or Fault Routine interrupts normal
execution of your program, the original value of S:0/3 is
restored when execution resumes.
••••
When a DII interrupts normal execution of your program, the
original value of S:0/3 is restored when execution resumes.
•••
S:0/4 to
S:0/15
NA Reserved •••••
S:1/0
to
S:1/4
Status Processor Mode Status/Control
Bits 0-4 function as follows:
•••••
0 0000 = (0) Remote Download in progress.
0 0001 = (1) Remote Program mode (the fault mode exists
when bit S:1/13 is set along with mode 0 0001)
0 0011 = (3) Suspend Idle (operation halted by SUS
instruction execution) fault mode exists when
bit S:1/13 is set along with mode 0 0011.
0 0110 = (6) Remote Run mode
0 0111 = (7) Remote Test continuous mode
0 1000 = (8) Remote Test single scan mode
0 1001 = (9) Remote Test single step (step until)
TIP
All modes in the fixed, SLC 5/01, and SLC 5/02 processors are
considered as remote because they do not have a keyswitch.
1 0000 = (16) Download in progress (keyswitch=PROGram) • • •
1 0001 = (17) PROGram mode - the fault mode exists when
bit S:1/13 is set along with mode 1 0001.
1 1011 = (27) Suspend Idle - the fault mode exists when bit
S:1/13 is set along with mode 1 1011
(keyswitch=RUN)
1 1110 = (30) RUN - the fault mode exists when bit S:1/13 is
set along with mode 1 1110 (keyswitch=RUN).
All other values for bits 0-4 are reserved.
S:1/5 Status Forces Enabled Bit
This bit is set by the processor if you have enabled forces in a
ladder program. Otherwise, the bit remains cleared. The
processor Forced I/O LED is on continuously when forces are
enabled.
•••••
Table B.2 Status File Functions (Continued)
Address Classification Description Fixed
5/01
5/02 5/03 5/04 5/05
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