Appendices
A-58
CP2E CPU Unit Software User’s Manual(W614)
A-2 Auxiliary Area Allocations by
Address
The following table lists the data provided in the Auxiliary Area in order of the addresses of the data.
A-2-1 Read-only Words
Address
Name Function Settings
Status
after
mode
change
Status at
startup
Write
timing
Related
flags,
settings
Words Bits
A0 --- 10-ms Incrementing
Free Running Timer
This word contains the system timer
used after the power is turned ON.
A value of 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 A0 for
processing A and the value in A0 for
processing B. The interval is counted in
10 ms units.
Retained Cleared Every 10 ms
after power is
turned ON
A1 --- 100-ms Incrementing
Free Running Timer
This word contains the system timer
used after the power is turned ON.
A value of 0000 hex is set when the
power is turned ON and this value is
automatically incremented by 1 every
100 ms. The value returns to 0000 hex
after reaching FFFF hex (6,553,500
ms), and then continues to be
automatically incremented by 1 every
100 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 A0 for
processing A and the value in A0 for
processing B. The interval is counted in
100 ms units.
Retained Cleared Every 100 ms
after power is
turned ON
A40 to
A44
--- Ethernet
Communication Error
Log
When an error has occurred, the error
code, error contents, and error's time
and date are stored in the Error Log
Area. Information on the most recent
errors can be stored.
Each error record occupies 5 words.
A40: Error code (bits 0 to 15)
A41: Error contents (bits 0 to 15)
A42: Minutes (upper byte), Seconds
(lower byte)
A43: Day of month (upper byte), Hours
(lower byte)
A44: Year (upper byte), Month (lower
byte)
For details of the
error code and the
error contents, refer
to 6-1-11 Other Error
in the CP2E CPU
Unit Hardware User's
Manual (Cat. No.
W613).
Retained Retained Refreshed
when error
occurs.
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