Toshiba LF620 B Series Instruction Manual page 131

 Preset count output performance
(1) The following is an example for totalizer flow counts output in which the totalizer is reset with an
external signal (when preset output status level hold mode is set (contact ON)).
Counter Reset/Start signal
(DI detective level is H)
Totalizer flow counts
Preset point output
* When the Reset/Start signal is in H level (DI counter control signal level: H), the totalizer is reset to
zero and stops counting. When the Reset/Start signal goes to L level, the totalizer starts counting.
The preset point output goes ON when the totalizer counts reaches the preset point, and the output
goes OFF when the totalizer is reset to zero.
(2) The following is an example for totalizer flow counts output in which the totalizer is reset with an
external signal (when one-shot pulse output mode is set).
Counter Reset/Start signal
(DI detective level is L)
Totalizer flow counts
Preset point output
* When the Reset/Start signal is in L level (DI counter control signal level: L), the totalizer is reset to
zero and stops counting. When the Reset/Start signal goes to H level, the totalizer starts counting.
The preset point output goes ON when the totalizer counts reaches the preset point. The output
goes OFF when the totalizer is reset to zero or when it takes the time set pulse width from the
output goes ON.
Counter reset Counter start
Input/Output signal time chart
Counter start
Counter reset
For the toralizer is reset to zero,
the preset output goes OFF.
Input/Output signal time chart
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H level input
L level input
Preset point
0
Counter reset
ON
OFF
H level input
L level input
Preset point
0
Counter reset
ON
50ms
OFF
For it takes the time set pulse width
from the output goes OFF.
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