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Chapter 4. Basic instructions
4-28
4.9
Timer instructions
4.9.1
TON
TON
On-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
TON
O
O
3
1) Functions
-
A timer consists of timer contact, current value, and setting value.
-
The current value will start to increase when the input condition turns on. It will increase by 1 at
every 0.1 or 0.01 sec until it reaches to the setting value or input condition turns off.
-
The timer contact will be switched on when the current value reaches to the setting value.
-
The timer contact and current value is cleared when the input condition turns off or RST instruction
is executed.
2) Program example
The T097 (0.01 sec timer) will turn on 20 seconds later until the P020 is switched on.
V
TON
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 = 20sec
( Increase )
P020
T097
(
P065
)
P020
T097
[
TON T097 00200
]
[
RST T097
]
P021
[Time chart]
[Program]