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MELSEC-Q
10 DEVICES
High-speed timers
(1) Definition
(a) High speed timers are valid only while the coil is ON. A high speed timer is
marked with a symbol "H".
(b) The time measurement begins when the timer's coil switches ON, and the
contact switches ON when the time elapses. When the timer's coil switches
OFF, the current value becomes "0", and the contact switches OFF.
X0
H
[Ladder example]
When X0 switches ON, the T200 coil switches ON, and
the contact switches ON 2 second later. (The high-speed
timer measures time in 10 ms units.)
K200
T200
High-speed timer display
T200 coil
OFF
OFF
OFF
ON
ON
ON
2s
[Time chart]
X0
T200 contact
(2) Measurement units
(a) The default time measurement units setting for high speed timers is
10 ms.
(b) The time measurement units setting can be designated in 0.1ms units within
a 0.1 ms to 100 ms range.
This setting is designated at the "PLC system" tab screen in the “(PLC)
Parameter"dialog box.
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