Mitsubishi Electric Q01UCPU User Manual page 363

(7)
Precautions for using timers
(a) Use of the same timer
Do not use the OUT T
If this occurs, the current timer value will be updated by each OUT T
incorrect time measurement.
OUT
END T
Sequence
program
(b) When the timer is not executed in every scan
While a coil of a timer (for example. T1) is on, do not make the
part with another instruction such as CJ.
If jump of the OUT T
Also, if a timer exists in a subroutine program, execute a subroutine call including the OUT T1 instruction once
in each scan while the coil of the timer (for example, T1) is on.
Failure to do so will not update the current timer value.
(c) Programs that cannot use timers
Timers cannot be used in interrupt programs and fixed scan execution programs.
(d) When the set value is 0
The contact turns on when the
(e) Timer setting value and timer limit setting
Set the timer to meet the following condition:
Timer setting value
T0
If the values are set to become "Timer setting value < Scan time + Timer Limit Setting", the coil and the contact
might be simultaneously turned on depending on the timing on which the coil is turned on.
If the setting does not meet the above condition, make the value of the timer limit setting smaller to meet the
condition.
instruction that describes the same timer more than once within one scan.
OUT OUT
T T END
1 scan
instruction has occurred, the current timer value is not updated.
OUT T instruction is executed.
Scan time
K2
(SD526, SD527)
instruction execution, resulting in
OUT OUT
T T
Current value is updated.
OUT T1 instruction jumped to any other
Timer Limit Setting
CHAPTER 4 DEVICES
4
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