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CHAPTER9 DEVICES
9
2
3
4
5
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8
9.2 Internal User Device
9.2.10 Timer (T)
9 - 21
(4) Low-speed timer
(a) Definition
This type of timer measures time in increments of 1 to 1000ms.
The timer starts time measurement when its coil is turned on, and when it times out, the contact is
turned on. If the timer's coil is turned off, the current value is changed to "0" and the contact is
turned off.
(b) time increment setting
The time increment is set in the PLC system tab of the PLC parameter dialog box.
The default is 100ms, and it can be changed in increments of 1ms.
(5) High-speed timer
(a) Definition
This type of timer measures time in increments of 0.01 to 100ms.
The timer starts time measurement when its coil is turned on, and when it times out, the contact is
turned on. If the timer's coil is turned off, the current value is changed to "0" and the contact is
turned off.
(b) Time increment setting
The time increment is set in the PLC system tab of the PLC parameter dialog box.
The default is 10.0ms, and it can be changed in increments of 0.01ms.
Figure 9.22 Ladder example and timing chart of a low-speed timer
Figure 9.23 Ladder example and timing chart of a high-speed timer
X0
T0
K10
OFF
OFF
OFF
ON
ON
ON
X
0
[Ladder example]
[Timing chart]
When X0 is turned on, coil of T0 is turned on, and the
contact turns on after 1s. (when unit of the timer is set
to 100ms)
1s
T0 coil
T0 contact
X0
H K50
T200
High-speed timer indication
OFF
OFF
OFF
ON
ON
ON
X0
[Ladder example]
When X0 is turned on, coil of T200 is turned on, and the
contact turns on after 0.5s. (when unit of the timer is set
to 10ms)
[Timing chart]
0.5s
T200 coil
T200 contact