Mitsubishi Q00JCPU User Manual page 481

9
DEVICE EXPLANATION
(8) Precautions for using timers
Basic
Note9.7
Basic
Redundant
Note9.8
Note7
Basic
The Basic model QCPU cannot use fixed scan execution type programs.
Note9.7
Basic Redundant
The Basic model QCPU and Redundant CPU cannot use low speed execution type programs.
Note9.8
Note8
The following are a few precautions regarding timer use:
(a) Use of the same timer
A given timer cannot be designated (by OUT T ) more than once in a single
scan.
This designation results in measurement, since the timer current value is updated
at execution of each OUT T
OUT
END T
Sequence
program
(b) When timer is skipped by CJ instruction
When a timer (for example. T1) coil is ON, the OUT T1 instruction cannot be
skipped using a CJ instruction, and so forth.
If the OUT T instruction is skipped, the timer current value will not be updated.
(c) Program that cannot use timers
Timers cannot be used in interrupt programs and fixed scan execution programs.
Note9.7
Note7
(d) When set value is 0
If the timer set value is "0", the contact turnes ON when the OUT T
executed.
(e) When set value is changed after time-out
If the set value changes to a value which is higher than the current value following
a timer "time-out", the "time-out" status will remain in effect, and timer operation
will not be performed.
(f) When low speed execution type program is used
If a timer is used at a low speed execution type program, the current value will be
added to the low speed scan time when the OUT T
Section 3.3.3)Note8
instruction.
OUT OUT
T T END
1 scan
Diagram 9.26 When the same timer is used
9.2 Internal User Devices
OUT OUT
T T
Current value
is updated.
instruction is
Note9.8
instruction is executed.(
9.2.10 Timer (T)
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