Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 181

Processing details
• 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.
Type Timer coil
Low-speed timer Off
High-speed timer
Low-speed retentive Off
timer
High-speed
retentive timer
• 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.
• 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.
• 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)
Precautions
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.
Ex.
When timers T0 to T2 are programmed in order from the one that measures last
T1
OUT T2 K1
T0
OUT T1 K1
X0
OUT T0
K1
Current value Before time is up
Normally open
contact
0 Non-continuity
Current value Non-continuity
retained
(1)
(2)
(3)
After time is up
Normally closed Normally open
contact contact
Continuity Non-continuity
Continuity Continuity
(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.
5 SEQUENCE INSTRUCTIONS
Normally closed
contact
Continuity
Non-continuity
179
5.3 Output Instructions
5