Installation manual

Publication 1747-RM001G-EN-P - November 2008
SLC Status File B-13
S:1/14 Status Access Denied Bit (OEM Lock)
You can allow or deny future access to a processor file. Set
this bit to deny access. This indicates that a programming
device must have a matching copy of the processor file in its
memory in order to monitor the ladder program. A
programming device that does not have a matching copy of the
processor file is denied access.
To program this feature, select “Future Access Disallow”
when
saving your program. To provide protection from inadvertent
data monitor alteration of your selection, program an
unconditional OTL instruction at address S:1/14, to deny future
access. Program an unconditional OTU instruction at address
S:1/14 to allow future access.
When this bit is cleared, it indicates that any compatible
programming device can access the ladder program (provided
that password conditions are satisfied).
•••••
When access is denied, the programming device (APS or HHT)
may not access the ladder program. Functions such as change
mode, clear memory, restore program, and transfer memory
module are allowed regardless of this selection. A device such
as the DTAM is not affected by this function.
S:1/15 Status First Pass Bit
Use this bit to initialize your program as the application
requires. When this bit is set by the processor, it indicates that
the first scan of the user program is in progress (following
power up in the RUN mode or entry into a REM Run or REM
Test mode). The processor clears this bit following the first
scan.
When this bit is cleared, it indicates that the program is not in
the first scan of a REM Test or REM Run mode.
•••••
This bit is set during execution of the startup protection fault
routine. Refer to S:1/9 for more information.
••••
S:2/0 Status STI (Selectable Timed Interrupt) Pending Bit
When set, this bit indicates that the STI timer has timed out
and the STI routine is waiting to be executed. This bit is
cleared upon starting of the STI routine, power up, exit of the
REM Run mode, or execution of a true STS instruction.
••••
The STI pending bit will not be set if the STI timer expires
while executing the fault routine.
•
This bit is set if the STI timer expires while executing the DII
subroutine or fault routine.
•••
Table B.2 Status File Functions (Continued)
Address Classification Description Fixed
5/01
5/02 5/03 5/04 5/05