Toshiba T2N - Manual (Page 117)

2.INTERNAL OPERATIONS
104 PROSEC T2N
As explained in 2.3, when the RUN mode transition conditions are set up, the
initial load (when necessary), the user data initialization, the I/O mounting check,
the program check and scan mode selection are performed, and scan control
begins. In scan control, mode control, batch I/O processing, timer update and
user program executions are repeated. The following diagram shows the scan
control flow chart.
RUN mode transition conditions
set up in mode control
initial load (when necessary)
user data initialization
I/O mounting check
user program check
scan mode set up
batch I/O processing
timer update
running user program
mode control
batch I/O processing
timer update
running user program
•
‚
ƒ
„
…
†
‡
ˆ
‰
Š
RUN mode transition
first scan
second scan and thereafter
(repeated)
2.4
Scan control