Mitsubishi Q02CPU

9
DEVICE EXPLANATION
9.2 Internal User Devices
9.2.10 Timer (T)
9
- 30
9
Device Explanation
10
CPU Module Processing Time
11
Procedure for Writing Program to CPU Module
AppendicesIndex
(8) Precautions for using timers
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 instruction.
(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 instruction is
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
Note9.8
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 instruction is executed.(
Section 3.3.3)Note8
Diagram 9.26 When the same timer is used
Note7
Note8
END
END
OUT
T
OUT OUT OUT OUT
Current value
is updated.
Sequence
program
1 scan
T
T T T
Basic
Note9.7
The Basic model QCPU cannot use fixed scan execution type programs.
Basic
Note9.7
The Basic model QCPU and Redundant CPU cannot use low speed execution type programs.
Basic
Note9.8
Redundant
Basic
Redundant
Note9.8