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Auxiliary Area Section 9-11
CPU Bus Unit Flags/Bits
Special I/O Unit Flags/Bits
Flags for Programming
Name Address Description Access
CPU Bus Unit Initialization
Flags
A30200 to
A30215
These flags correspond to CPU Bus Units 0 to 15. A flag will
be ON while the corresponding Unit is initializing after the
power is turned ON or the Unit’s Restart Bit (in A501) is
turned ON.
Read-only
CPU Bus Unit Restart Bits A50100 to
A50115
These bits correspond to CPU Bus Units 0 to 15. Turn a bit
from OFF to ON to restart the corresponding Unit.
Read/write
Name Address Description Access
Special I/O Unit Initialization
Flags
A33000 to
A33515
These flags correspond to Special I/O Units 0 to 95. A flag
will be ON while the corresponding Unit is initializing after
the power is turned ON or the Unit’s Restart Bit is turned
ON. (Restart Bits A50200 to A50715 correspond to Units 0
to 95.)
Read-only
Special I/O Unit Restart Bits A50200 to
A50715
These bits correspond to Special I/O Units 0 to 95. Turn a bit
from OFF to ON to restart the corresponding Unit.
Read/write
Name Address Description Access
First Cycle Flag A20011 This flag is turned ON for one cycle when program execution
starts (the operating mode is switched from PROGRAM to
RUN/MONITOR).
Read-only
Initial Task Execution Flag A20015 When a task switches from INI to RUN status for the first
time, this flag will be turned ON within the task for one cycle
only.
Read-only
Task Started Flag
(Not supported by CJ1@-
CPU@@ CPU Units.)
A20014 When a task switches from WAIT or INI to RUN status, this
flag will be turned ON within the task for one cycle only.
The only difference between this flag and A20015 is that this
flag also turns ON when the task switches from WAIT to
RUN status.
Read-only
10-ms Incrementing Free
Running Timer
(Unit versions 3.0 or later)
A000 This word contains the system timer used after the power is
turned ON.
0000 hex is set when the power is turned ON and this value
is automatically incremented by 1 every 10 ms. The value
returns to 0000 hex after reaching FFFF hex (655,350 ms),
and then continues to be automatically incremented by 1
every 10 ms.
Note: The timer will continue to be incremented when the
operating mode is switched to RUN mode.
Example: The interval can be counted between processing
A and processing B without requiring timer
instructions. This is achieved by calculating the
difference between the value in A000 for process-
ing A and the value in A000 for processing B. The
interval is counted in 10 ms units.
Read-only
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