Installation manual

Publication 1747-RM001G-EN-P - November 2008
SLC Status File B-45
S:30 Dynamic Config Selectable Timed Interrupt - Setpoint
You enter the timebase, in tens of milliseconds, to be used
in the selectable timed interrupt. Your STI routine executes
per the value you enter. Write a zero value to disable the
STI.
To provide protection from inadvertent Data Monitor
alteration of your selection, program an unconditional MOV
instruction containing the setpoint value of your STI to S:30,
or program a CLR instruction at S:30 to prevent STI
operation.
If the STI is initiated while in the REM Run mode by loading
the status registers, the interrupt starts timing from the end
of the program scan in which the status registers were
loaded. If the STI has been previously configured (with a
different setpoint), the new setpoint takes effect only after
the previously-configured STI has timed out.
Selectable timed interrupts are discussed on page 11-8 of
this manual.
••••
The STI Setpoint timebase can be either 10 ms or 1 ms
depending on the value of the STI Setpoint Selection bit
S:2/10. When clear, operation is as described above. When
set, the timebase is expressed in 1 ms increments. The STE
enables and STD disables the STI instruction.
•••
S:31 Dynamic Config Selectable Timed Interrupt - File Number
You enter a program file number (3 to 255) to be used as the
selectable timed interrupt subroutine. Write a zero value to
disable the STI.
To provide protection from inadvertent Data Monitor
alteration of your selection, program an unconditional MOV
instruction containing the file number value of your STI to
S:31, or program a CLR instruction at S:31 to prevent STI
operation.
Selectable timed interrupts are discussed on page 11-8 of
this manual.
••••
Table B.4 Status File Functions (Continued)
Address Classification Description Fixed
5/01
5/02 5/03 5/04 5/05