5 SEQUENCE INSTRUCTIONS
5.3 Output Instructions
179
5
• These instructions start time measurement, triggered by the coil specified by (d) (in SD language or FBD/LD, displayed as
Coil), when the operation result up to the OUT instruction is on. When time is up (current value set value), the normally
open contact turns on (continuity state) and the normally closed contact turns off (non-continuity state).
• When the operation result up to the OUT instruction turns off, the contact responds as shown below.
• To clear the current value of the retentive timer and turn off the contact after time is up, use the RST instruction.
• When the timer set value is 0, the time will be up at execution of the OUT instruction.
• The following operations are performed at execution of the OUT instruction.
• If the OUT T instruction is skipped by using such as the JMP instruction while the OUT T, OUTH T, OUT ST, or OUTH ST
instruction is on, the current value is not updated or the contact is not turned on or off.
• If the same OUT T, OUTH T, OUT ST, or OUTH ST instruction is executed two times or more in a single scan, the current
value is updated by the number of times the instruction is executed.
• The timer limit value is set in parameter using the engineering tool.
Low-speed timer/low-speed retentive timer: 1 to 1000ms (in increments of 1ms) (Default: 100ms)
High-speed timer/high-speed retentive timer: 0.01 to 100.0ms (in increments of 0.01ms) (Default: 10.0ms)
• For the counting method, refer to the following.
MELSEC iQ-R CPU Module User's Manual (Application)
To create a program in which the operation of a timer contact triggers the operation of another timer, program the timers in
order from the one that operates last.
In the following cases, if a program is created in order of timer measurements, all timers turn on in the same scan.
• The set value is smaller than the scan time.
• The set value is 1.
When timers T0 to T2 are programmed in order from the one that measures last
Type Timer coil Current value Before time is up After time is up
Normally open
contact
Normally closed
contact
Normally open
contact
Normally closed
contact
Low-speed timer Off 0 Non-continuity Continuity Non-continuity Continuity
High-speed timer
Low-speed retentive
timer
Off Current value
retained
Non-continuity Continuity Continuity Non-continuity
High-speed
retentive timer
• The coil used as a trigger of the OUT T, OUTH T, OUT ST, or OUTH ST instruction turns on or off.
• The contact used as a trigger of the OUT T, OUTH T, OUT ST, or OUTH ST instruction turns on or off.
• The current value of the OUT T, OUTH T, OUT ST, or OUTH ST instruction is changed.
(1) Timer T2 starts measurement from the next scan after the contact of timer
T1 turns on.
(2) Timer T1 starts measurement from the next scan after the contact of timer
T0 turns on.
(3) Timer T0 starts measurement when X0 turns on.
T1
T0
X0
(1)
(2)
(3)
T2OUT
K1
T1OUT
K1
T0OUT
K1
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