Mitsubishi MELSEC QCPU Programming Manual page 117

5 SEQUENCE INSTRUCTIONS
[Set Data]
Set Data
D
Set value
POINT
3: The value setting for the timer cannot be designated indirectly.
See Section 3.4 for further information on indirect designations.
[Functions]
(1) When the operation results up to the OUT instruction are ON, the timer coil goes ON and the
timer counts up to the value that has been set; when the time up status (total numeric value is
equal to or greater than the setting value), the contact responds as follows:
(2) The contact responds as follows when the operation result up to the OUT instruction is a
change from ON to OFF:
Type of Timer
Low speed timer
High speed timer
Low speed retentive timer
High speed retentive timer
The present value is cleared from low speed retentive timers and high speed retentive timers, and the
contact is reset, by use of the RST instruction.
(3) To clear the present value of a retentive timer and turn the contact OFF after time up, use the
RST instruction.
(4) A negative number (-32768 to -1) cannot be set as the setting value for the timer.
If the setting value is 0, the timer will time out when the time the OUT instruction is executed.
(5) The following processing is conducted when the OUT instruction is executed:
• OUT T
• OUT T
• OUT T
In cases where a JMP instruction or the like is used to jump to an OUT T
the OUT T
conducted. Also, if the same OUT T
same scan, the present value of the number of repetitions executed will be updated.
(6) Index modification for timer coils or contacts can be conducted only by Z0 or Z1.
Index modification cannot be conducted for the set value for the timer.
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Timer number
Value set for timer
A contact
B contact Non-continuity
Present
Timer Coil Value of
OFF
Maintains
OFF the present
coil turned ON or OFF
contact turned ON or OFF
present value updated
instruction is ON, no present value update or contact ON/OFF operation is
Meaning
Indirect designation not possible
@ D0
T0
Continuity
Prior to Time Up
A Contact B Contact
Timer
Non-
0 Continuity
continuity
Non-
Continuity
continuity
value
instruction is conducted two or more times during the
MELSEC-Q/QnA
Data Type
Bit
BIN 16 bits
3
After Time Up
A Contact B Contact
Non-
Continuity
continuity
Non-
Continuity
continuity
instruction while
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