Timer - Mitsubishi Electric MELSEC-A0J2H Series Handbook

7
PROGRAMS REPLACEMENT

7.7.4 Timer

Function
Measure-
ment units
Low-speed
timer
Specifying
method
Measure-
ment units
High-speed
timer
Specifying
method
Measure-
ment units
Retentive
timer Specifying
method
Measure-
ment units
High-speed
retentive timer Specifying
method
Setting range of set value
Processing set value 0
Updating current value
Turning contacts ON/OFF
(1) Precautions for using the timer
For details on precautions for using the timer, refer to the QCPU User's manual (Function Explanation,
Program Fundamentals).
(a) Programming method of the timer ladder on QCPU
Specify the number of points of the timer and retentive timer in the device settings of the parameter.
The appropriate uses of the low-speed timer, high-speed timer, retentive timer, and high-speed
retentive timer are programmed by adding an "H" or "S" to the OUT instructions.
Example Low-speed timer :
High-speed timer :
Low-speed retentive timer :
High-speed retentive timer :
(b) Programming method of the timer ladder on the A0J2HCPU
In the device settings of the parameter, specify the total number of timer points and the head device
numbers of the low-speed timer, high-speed timer, and retentive timer.
The default values are; number of points: 256 points (fixed); low-speed timer head: 0 (T0 to T199);
high-speed timer head: 200 (T200 to T255); and retentive timer: 0 points.
When using retentive timers, change the settings to secure the necessary number of points.
QnUCPU
• 100ms(Default value)
Can be changed within a range of 1 to
1000ms (parameter)
K100
T0
• 10ms(Default value)
Can be changed within a range of 0.1 to
100ms (parameter).
Specifying the
high speed timer
H K100
T0
• Same measurement units as the low-speed
timer.
K100
ST0
• Same measurement units as the high-speed
timer.
Specifying the
high speed timer
H K100
ST0
• 1 to 32767
• Momentarily ON
• At execution of OUT Tn instruction
OUT T0
OUTH T0
OUT ST0
OUTH ST0
A0J2HCPU
• Fixed at 100ms
• Fixed at 10ms
• Fixed at 100ms
• None
• 1 to 32767
• Infinite (No times out)
• At END processing
Kn
Kn
Kn
Kn
K100
T0
K100
T200
K100
T0
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