Omron H3CR-A Manual page 198

H5AN
Precautions
Setting of Operating Time
Time Setting Range
Rated time
99.99 s
999.9 s
9999 s
99 min 59 s
999.9 min
99 hrs 59 min
999.9 hrs
9999 hrs
Note: The decimal point is not shown in the digital display.
1. Since the H5AN Timer is capable of reading the input data at
any time during normal operation, the set time can be
changed during power application. This feature sets back the
output from the timer by temporarily setting the longer time or
quickens the output by setting the shorter time. During normal
operation, the set time may be accidentally changed by
touching a thumbwheel switch, causing the timer to operate
with a different set time. To prevent this possibility, keep the
front cover closed except when changing the set time.
2. When the set time is all zeroes (e.g., 000.0 s or 00 hrs 00 min),
there will be a momentary control output upon power
application which can be used to check normal output. When
changing the set time during normal operation, pay special
attention not to alter the set value to this state.
3. Since the sexagesimal system is adopted, when a rated time
of 99 min 59 s or 99 hrs 59 min is selected, any value set to 6
or more (i.e. 6-9) in the order of x 10 s or x 10 min respectively
will be rated as 5. Some erroneous setting examples are
shown below.
Examples of Setting/Actual Operating Time
198
Setting range
0.01 to 99.99 s (see note)
0.1 to 999.9 s (see note)
1 to 9999 s
1 s to 99 min 59 s
0.1 to 999.9 min (see note)
1 min to 99 hrs 59 min
0.1 to 999.9 hrs (see note)
1 to 9999 hrs
4. When changing the set time while power is being supplied, an
inadequate push of the thumbwheel switches will display two
numbers in one digital display window, causing the operating
time to drift widely. Therefore, press the thumb-wheel
switches surely. Take particular care in the case when the
other three digits are all zero, since the improper setting of the
fourth switch to create four zeroes will cause a momentary
output.
(Undesirable Setting)
5. When operating the built-in selector switches of the
H5AN-4DM Timer with a backup power supply function for
memory protection, it is necessary to reset (either
externally or manually) the timer at the time the power is
applied.
Also when this type of timer is connected to a device (or
manually) this must also be done when power is applied for
the first time.
Note: If the timer is not reset, it operates in accordance with the
previous specifications or with the factory set specifica-
tions.
H5AN
(Possible Operating Time)
5 min 30 s
59 s
99 min
00 h 00 min
(momentary
output)
59 min
99 hrs