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5 Basic Instruction
5.4 Operating Timer
66
FXCPU Structured Programming Manual
[Basic & Applied Instruction]
Function and operation explanation
1. OUT_T operation
1) When the operation result up to the OUT_T instruction operation is ON, the timer coils is ON and counts
until the set value is reached. When the set time expires (or reaches the set count), the contacts become
as follows:
2) When the operation result up to the OUT_T instruction operation turns OFF from ON, the timer
parameters become as follows.
*1. Not supported by the FX
0S, FX0, FX1N, FX1NC, FXU, FX2C, FX2N or FX2NC PLC.
*2. Not supported by the FX
0S, FX0, FX0N or FX1S PLC.
2. Clearing integrating timer
After the set time expires, the current value of the integrating timer is cleared and the contacts are turned OFF
by the RST.
3. Timer set value
The set value can be specified directly by a decimal number (K) or indirectly using a data register (D) or
extension register (R).
Indirect setting by the extension register (R) is applicable only to the FX
3U and FX3UC PLCs.
No negative numbers (-32768 to -1) can be set.
If the timer value is set to "0", the time expires at the same time as the OUT_T instruction activates.
4. OUT_T operation
The following processes take place when the OUT_T instruction activates.
1) The OUT_T instruction TC coil turns ON or OFF.
2) The OUT_T instruction TS contacts turn ON or OFF.
3) The OUT_T instruction TN current value is changed.
If the OUT_T instruction is skipped by an instruction such as JMP while the OUT_T instruction is ON, neither
the current value is updated nor contacts are turned ON or OFF.
When one particular OUT_T instruction operates more than once within the same scan, the current value is
updated as many times as the timer operates.
NO (normally open) contact Timer is conductive.
NC (normally closed) contact Timer is not conductive.
Timer type Timer coil
Current timer
value
Before time-up After time-up
NO (normally
open) contact
NC (normally
closed)
contact
NO (normally
open) contact
NC (normally
closed)
contact
100 ms timer
0.1 to 3276.7 seconds
OFF 0 Nonconductive Conductive Nonconductive Conductive
10 ms timer
0.01 to 327.67 seconds
1 ms timer
*1
0.001 to 32.767 seconds
100 ms integrating timer
*2
0.1 to 3276.7 seconds
OFF
Holding current
value
Nonconductive Conductive Nonconductive Conductive
1 ms integrating timer
*2
0.001 to 32.767 seconds