Omron CP1L CPU UNIT - 03-2009, Operation Manual

Page: 684 / 810

650
Auxiliary Area Allocations by Function Appendix C
System Flags
Error Counter
Reset Bit Turn ON this bit to reset the Error Counter Present Value
and turn OFF the Error Counter Error Flag. Read/write ---
Error Counter Dis-
able Bit Turn ON this bit to hold the error counter value.
ON: Error counter value held.
OFF: Error counter value not held. Read/write ---
Present Value of
High-speed
Counter These words contain the present value of the high-speed
counter. Read • Cleared when power is turned ON.
• Cleared when operation starts.
• Updated each cycle during over-
see process.
• Updated when present value is
read using PRV instruction.
Present Value of
Internal Pulse
Output, Absolute
Value for Abso-
lute Coordinates These words contain the absolute value of the actual
movement in relation to the internal pulse origin when
pulses are being output to the error counter.
Data range: 8000 0000 to 7FFF FFFF hex
(
−
2,147,483,648 to 2,147,483,647)
Read • Cleared when power is turned ON.
• Cleared when operation starts.
• Updated each error counter cycle.
Name Address Description Access Updated
First Cycle Flag A200.11 ON for one cycle after PLC operation begins (after the
mode is switched from PROGRAM to RUN or MONITOR,
for example). Read-only
Initial Task Execution Flag A200.15 ON when a task is executed for the first time, i.e., when it
changes from INI to RUN status. Read-only
Task Started Flag A200.14 When a task switches from WAIT or INI to RUN status,
this flag will be turned ON within the task for one cycle
only.
Note The only difference between this flag and
A200.15 is that this flag also turns ON when the
task switches from WAIT to RUN status.
Read-only
Maximum Cycle Time A262 to
A263 These words contain the maximum cycle time since the
start of PLC operation. The cycle time is recorded in 8-
digit hexadecimal with the leftmost 4 digits in A263 and
the rightmost 4 digits in A262.
0 to FFFFFFFF: 0 to 429,496,729.5 ms (0.1-ms units) Read-only
Present Cycle Time A264 to
A265 These words contain the present cycle time in 8-digit
hexadecimal with the leftmost 4 digits in A265 and the
rightmost 4 digits in A264. Read-only
10-ms Incrementing Free
Running Timer A0 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 automati-
cally 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.
Read-only
100-ms Incrementing Free
Running Timer A1 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.
Read-only
Name Description Read/Write Updated