Mitsubishi Electric MELSEC-Q Series User Manual page 178

10 DEVICES
[Ladder example]
[Time chart]
10 - 20
High-speed timers
(1) Definition
(a) High-speed timers are timers which are only operative 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 present value becomes "0", and the contact switches OFF.
X0
X0 OFF
T200 coil OFF
T200 contact OFF
(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 in the PLC system settings in the PLC parameter
setting.
High-speed timer display
When X0 switches ON, the T200 coil switches ON, and
H K200
the contact switches ON 2 second later. (The high-speed
T200
timer measures time in 10 ms units.)
ON
ON
2 Sec.
ON
MELSEC-Q
10 - 20