Free-Running Timers - Omron CJ2 CPU - REV 10-2010 User Manual

10 CPU Unit Functions
Operation Start/End Times
These Auxiliary Area words automatically store the date and time that PLC operation was started and
stopped.
Name
Operation Start
Time
Operation End
Time
*1 The previous start time is stored after turning ON the power supply until operation is started.
*2 If an error occurs in operation, the time of the error will be stored. If the operating mode is then changed to
PROGRAM mode, the time that PROGRAM mode was entered will be stored.

10-1-3 Free-running Timers

The times for the system timers used after the power is turned ON are stored in the Auxiliary Area.
These timers can be used to calculate time intervals without using timer instructions. These timers can
be used to calculate time intervals without using timer instructions.
Name
10-ms Increment-
ing Free Running
Timer
100-ms Increment-
ing Free Running
Timer
1-s Incrementing
Free Running
Timer
Note When the operating mode is changed to RUN mode, automatic incrementing by 1 will continue.
Example: The time interval between processing A and processing B can be calculated in increments
of 10 ms by calculating the difference between the value in A0 for processing time A and
the value in A0 for processing time B without using timer instructions.
10-6
Address
A515 to The time that operation started as a result of changing the operating mode to
A517
RUN or MONITOR mode is stored here in BCD.
A515.00 to A515.07: Seconds (00 to 59)
A515.08 to A515.15: Minutes (00 to 59)
A516.00 to A516.07: Hour (00 to 23)
A516.08 to A516.15: Day of month (01 to 31)
A517.00 to A517.07: Month (01 to 12)
A517.08 to A517.15: Year (00 to 99)
A518 to The time that operation stopped as a result of changing the operating mode to
A520
PROGRAM mode is stored here in BCD.
A518.00 to A518.07: Seconds (00 to 59)
A518.08 to A518.15: Minutes (00 to 59)
A519.00 to A519.07: Hour (00 to 23)
A519.08 to A519.15: Day of month (01 to 31)
A520.00 to A520.07: Month (01 to 12)
A520.08 to A520.15: Year (00 to 99)
Address
A0 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.
A1 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 contin-
ues to be automatically incremented by 1 every 100 ms.
A2 A value of 0000 hex is set when the power is turned ON and this value
is automatically incremented by 1 every second. The value returns to
0000 hex after reaching FFFF hex (65,535 s), and then continues to
be automatically incremented by 1 every second.
Description
*1
*2
Description
CJ2 CPU Unit Software User's Manual