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Chapter 4. Basic instructions
4-30
4.9.2
TOFF
TOFF
Off-delay timer
Available Device
Flag
Instructions
M
P
K
L
F
T
C
S
D
#
D Integer
Steps
Error
(F110)
Zero
(F111)
Carry
(F112)
Txxx
O
TOFF
O
O
3
1) Functions
-
A timer consists of timer contact, current value, and setting value.
-
When the input condition turns on, the current value will be set as the setting value and the timer
contact will turn on.
-
When the input condition turns off, the current value will decrease by 1 at every 0.1 or 0.01 sec
until it reaches to 0 or input condition turns off.
-
The timer contact will be switched off when the current value reaches to 0.
-
When the input condition turns off or RST instruction is executed, the timer contact will turn off and
the current value will be cleared as 0.
2) Program example
The T000 (0.1 sec timer) will turn off 5 seconds later until the P020 is switched off.
V
TOFF
Input condition
Timer setting value
Timer contact number
∴
Setting time ( t ) = Unit period (0.1 or 0.01 sec) x Setting value
Txxx
V
←
→
t = 5sec
( Decrease )
P020
T000
(
P065
)
P020
T000
[
TOFF T097 00200
]
[
RST T000
]
P022
[Time chart]
[Program]