Omron H3DS Manual page 19

Operation
■ Basic Operation
Setting of Selector
The selectors can be turned clockwise and counterclockwise to
select the desired time scale, or operating mode.
Each selector has a snap mechanism that secures the selector at a
given position. Set the selector at a position at which it is secured. Do
not set it midway between two securing positions or a malfunction
could result from improper setting.
Settings for ON/OFF Start
If voltage is applied to terminal B1, or if terminals A1 and B1 are
shorted, the operating mode is switched to flicker-ON start mode. If
these terminals are disconnected, the mode switches to flicker-OFF
start mode. The operating mode will not change if the state of the
applied voltage changes during timer operation.
Selection of Time Scale
The time scale is selected by turning the ON-time scale selector and
OFF-time scale selector. The time scales will appear in the following
order in each time scale display window on the left of the selector:
0.1 s, 1 h, 0.1 h, 1 m, 1 s, 0.1 h, 0.1 m, 1 s.
Note: The time scales "1 s" and "0.1 h" appear twice. Both instances
indicate exactly the same time scale.
ON-time scale
display window
and selector
OFF-time scale display
window and selector
■ Timing Charts
Operating
mode
Flicker-OFF
start
Power (A
(See note 1.)
Output relay: NO
15 and 18
(ON indicator)
Output relay: NC
15 and 16
OFF indicator
Flicker-ON
start
(See note 1.)
Note: 1. If voltage is applied to terminal B1, or if terminals A1 and B1 are shorted, the operating mode is switched to flicker-ON start mode. If these
terminals are disconnected, the mode switches to flicker-OFF start mode.
2. The reset time requires a minimum of 0.1 s.
3. When power is supplied in flicker-ON start mode, the OFF indicator lights momentarily. This, however, has no effect on the performance
of the Timer.
ON
and A )
1 2
OFF
ON
OFF
ON
OFF
ON
OFF
ON
Power (A and A )
1 2
OFF
ON
Signal (B and A )
1 2
OFF
Output relay: NO
ON
15 and 18
OFF
(ON indicator)
ON
Output relay: NC
OFF
15 and 16
ON
OFF indicator
OFF
Time Setting
Use the ON/OFF-time setting dials to set the ON/OFF time.
Locking/Unlocking of Selectors and
Time Setting Dial
The ON/OFF-time setting dials and time scale selectors can be
locked using the Y92S-38 Lock Key, a special pen type tool that is
sold separately. To lock the dials or selectors, insert the Lock Key in
the keyhole to the lower right of the dial or selector and turn it clock-
wise until the dial or selector is completely covered with the red
cover. To unlock, turn the Lock Key in the opposite direction.
Timing chart
0.1 s min.
0.1 s min.
Solid-state Twin Timer
Key hole
t : ON set time
ON
t : OFF set time
OFF
t : ON set time
ON
t : OFF set time
OFF
H3DS-F
B-27